Project Summary

The NSF is planning for a High-performance Instrumented Airborne Platform for Environmental Research (HIAPER), an advanced airborne research platform to serve NSF's scientific research needs over the next several decades. NSF requested that NCAR, consistent with its role as a Federally-Funded Research and Development Center, propose a Systems Integration Plan to cover acquisition, modification, instrumentation, and eventual operation of the new aircraft. This plan, submitted through UCAR, parent corporation for NCAR, proposes management of the overall HIAPER acquisition.

This proposed plan presents scientific needs for HIAPER consistent with the overall NSF emphasis on understanding and predicting the earth system. Proposed HIAPER capabilities, especially altitude capabilities to 50,000 feet and range capabilities of greater than 6000 nautical miles, match many of the observational challenges inherent in an emphasis on atmosphere, ocean, land, and ice interactions. The plan describes five specific tasks: Specifications, Aircraft Acquisition and Modification, Installation of Research Infrastructure, Instrumentation, and Preparation for Operations. ATD proposes extensive community review and oversight throughout the acquisition. In particular, ATD proposes to establish a new HIAPER Advisory Committee with majority membership from the university research community.

ATD will lead and provide most of the staff for the HIAPER effort. ATD will manage this project through a HIAPER team composed of ATD, NCAR and UCAR staff. The team will also include staff from NCAR science divisions such as the Atmospheric Chemistry Division and the Mesoscale and Microscale Meteorology Division and from UCAR units, including Corporate Affairs and Finance and Administration. ATD will hire a full-time project manager for the term of the overall acquisition. ATD will contract additional assistance from the USAF Commercial Aircraft Integrated Project Team, a group at Wright-Patterson Air Force Base with extensive experience in acquiring and overseeing the modification of commercial aircraft for Department of Defense and other federal aviation needs.

The overall process, from development of specifications through flight testing to research operations, will take approximately five years. Manufacture and modification of the airframe and development of advanced research instrumentation constitute the largest portions of that schedule. Sufficient definition of the research missions and payloads will occur early in the process to help specify structural modifications. Instrument development will begin early in the schedule to allow completion in phase with the availability of the modified, outfitted aircraft.


HIAPER* System Acquisition and Integration

(*High-performance Instrumented Airborne Platform for Environmental Research)

1. OVERVIEW AND RELATION TO NSF REVIEW CRITERIA

2. SCIENTIFIC NEEDS AND REQUIREMENTS FOR HIAPER 3. PLANNING ENVIRONMENT 4. PROJECT ORGANIZATION AND MANAGEMENT
5. DESCRIPTION OF WORK
6. QUALIFICATIONS OF UCAR AND NCAR
7. QUALIFICATIONS OF USAF COMMERCIAL AIRCRAFT INTEGRATED PRODUCT TEAM

8. ESTIMATED COSTS AND BUDGETS

9. CONCLUSION


1. Overview and Relation to NSF Review Criteria

1.1 Response to the NSF Review Criteria

UCAR submits this plan on behalf of the scientific research community for review by NSF. We understand that the review of this proposal will adhere to
NSF merit review criteria applicable to all proposals, with additional factors pertinent to the unique aspects of a major facility acquisition. The NSF merit review criteria are:

Section 2, Scientific Needs and Requirements for the High-performance Instrumented Airborne Platform for Environmental Research (HIAPER), addresses both review criteria. As described in that section and elsewhere throughout the document, we believe that the HIAPER acquisition responds to clear and substantial scientific needs and will enable a broad range of new scientific research.

Subsequent sections describe ATD's plans for managing the overall procurement and instrumentation processes. Efforts described in those sections also relate directly to the review criteria, especially to the broad impact of the overall HIAPER acquisition process. Sections 4.5 and 5.4 detail plans for instrumentation for HIAPER. A large portion of the instrument development effort will occur at universities with HIAPER funding. This burst of instrument development, coupled with challenging new design criteria, will invigorate development activities at universities and inject new technologies into these university laboratories as well as research aviation. In less than two years, 15 aircraft from other agencies and other countries have added the new NCAR Global Positioning System (GPS) dropsonde, with spectacular results. We project similar impacts from HIAPER-related instrument developments.

Section 3.2.1 describes communication capabilities of the new aircraft related to educational opportunities. We project that capabilities available as HIAPER comes on line will allow wide bandwidth connections to and from the aircraft during operations. The aircraft will function as another node on the next-generation internet, making operational information and instrument data available in classrooms and laboratories. Many students have monitored submarine and even Mars operations in real-time. HIAPER will bring airborne information and imagery to students at a variety of levels.

1.2 Task and Cost Summary

Table 1 presents a summary of major tasks and proposed completion dates. Total estimated costs for the project are shown in Table 2.

Table 1. Summary of Major Tasks and Proposed Completion Dates

Major HIAPER Milestones Completion Goal
Award aircraft contract October 1999
Accept modified aircraft October 2001
Complete research infrastructure October 2002
Complete instrumentation January 2003
Accept HIAPER system; begin operations October 2003

 

Table 2. Total Estimated Costs for HIAPER Project

Summary (67.50 FTE) FY 1999 FY 2000 FY 2001 FY 2002 FY 2003 Total
Task 1: Specifications 751,000 0 0 0 0 751,000
Task 2: Acquisition 147,000 45,535,000 184,000 88,000 0 45,954,000
Task 3: Infrastructure 0 99,000 4,308,000 300,000 110,000 4,817,000
Task 4: Instrumentation 0 5,700,000 534,000 4,806,000 556,000 11,596,000
Task 5: Prep. for Ops. 0 0 118,000 244,000 2,520,000 2,882,000
Total: HIAPER Costs 898,000 51,334,000 5,144,000 5,438,000 3,186,000 66,000,000
Inflation-adjusted Total 916,000 53,473,000 5,476,000 5,922,000 3,536,000 69,323,000
 

2. Scientific Needs and Requirements for HIAPER

A platform like HIAPER will enable and serve scientists for several decades. In particular, the altitude, range, and endurance capabilities of HIAPER match well with an overall NSF focus on understanding and predicting the earth system. Earth system research includes a broad range of studies on all aspects of the earth and coupled earth-sun system. For the foreseeable future, research will focus on climate and weather, principally through national programs like the U.S. Global Change Research Program (USGCRP) and the U.S. Weather Research Program (USWRP). These investigations will explore: the dynamics and physics of weather systems at all scales; the rates, controlling processes, and possible changes in energy, water, and carbon cycles; the production, evolution, transport, and radiative properties of trace chemical species, aerosols and cloud particles; the interactions and feedback between the atmosphere and underlying oceans, land surface, and sea ice; and the interactions between lower (tropospheric) and upper (stratospheric, even mesospheric) regions of the atmosphere.

Other important scientific challenges, evolving from research in polar, biological, and ecological programs, also require measurements of atmospheric processes and use of airborne remote sensing tools. A research aircraft that can cover a quarter of the earth's circumference in a single flight, that can carry modern instruments to remote regions, and that can reach stratospheric altitudes over much of the planet, will enable progress on an enormous range of long-standing, recent, and future scientific questions.

In the discussion that follows, we describe some research areas that will have (or seem likely to attain) high priority over the next several years and that HIAPER will serve. Common issues cut across these research areas: the need to reach the upper troposphere and remote oceanic and polar regions; the need to understand interactions between the upper troposphere and lower stratosphere; the need to understand clouds, chemistry and dynamics simultaneously; and the need to understand all aspects of the hydrological cycle. The topics discussed also share a direct relevance to life on this planet, through their connections to weather prediction, air quality and climate change.

2.1 Weather

2.1.1 Atmospheric Dynamics

Physical dynamics in the upper troposphere play a large role in the formation and evolution of large-scale circulation and storm systems. Observations in this region will support research on tropopause folds, on stratospheric intrusions, on dry-slot formation in mid-latitude storm systems, and on a wide range of interacting and related gravity-wave processes. These observations require measurements over very large (1,000 km) scales, at altitudes well within the lower stratosphere at mid-latitudes.

On smaller scales, the upper portions of tropical and mid-latitude storm systems often go largely unmeasured. Ground and airborne Doppler radars provide some tracking of storm motions, but significant aspects remain largely unexplored. These include: the dynamics and microphysics of the upper parts of large storms; the influences of these storms on high-level regional cloud systems, on upper tropospheric water vapor distributions and on chemical processes; and the regional and large scale environmental controls on these storms by upper tropospheric conditions and processes. A modern mid-sized jet, equipped with appropriate cloud physics instruments and with remote sensors to detect in-cloud and clear air dynamics, will enable a substantial step forward in understanding atmospheric dynamics.

2.1.2 Precipitation Physics

Many uncertainties remain in fundamental microphysical processes involved in atmospheric precipitation. Particularly significant among these uncertainties are understanding how precipitation grows through warm rain processes and how ice forms and grows into precipitation. Observationalists and modelers recognize an urgent need to improve parameterizations of both precipitation processes in forecast and climate models. Improved short-term precipitation forecasts and better understanding of possible "acceleration" of the global hydrological cycle leading to an increasing frequency of intense precipitation events will have a major impact on human activities, particularly on food production.

At the most recent American Meteorological Society Cloud Physics Conference, scientists discussed plans for a community research initiative on ice microphysics. The initiative, yet to be named, will focus on ice initiation and evolution, ice structure, crystal growth, and precipitation development. Ice particles very likely play a large role in heterogeneous chemistry in the upper troposphere. Current NSF-supported aircraft provide no access to altitudes above 35,000 ft. Current special-purpose aircraft, such as ER-2s or WB-57Fs operated by National Aeronautics and Space Administration (NASA), cross through the upper troposphere, but rarely operate within that region, and even more rarely operate within clouds in that region. HIAPER, with capability to reach at least 50,000 ft, will thus provide unique access to ice-cloud regions throughout the global troposphere, excepting only perhaps the uppermost regions during the summer in the tropics.

2.1.3 Predictions On Short Time and Space Scales

Improvements in models and corresponding advances in computing raise the possibility of high-quality, high-resolution forecasts of, for example, extreme precipitation events. An important part of planning for the USWRP has been consideration of the value of improved forecasts of intense precipitation events. Such events annually cost the U.S. 150 lives and an estimated $3.4 billion. High-quality forecasts drive a need for high-quality observations. USWRP observational priorities include targeted observations and improved 3-D and 4-D water vapor fields.

Targeting strategies identify areas several thousand kilometers upstream of a given region that need enhanced observations 24-to-72 hours ahead of a forecast storm arrival. For Europe and North America, these sensitive regions occur far westward, in largely unobserved regions of the oceans. With the range to cross ocean basins at many latitudes, and with an automated GPS dropsonde capability, HIAPER will serve as an ideal platform for testing and evaluating these flexible targeted observational strategies. Eventually, targeted observations could improve forecasts of major winter storm systems.

Improved water vapor fields require a mix of satellite, aircraft, and ground-based measurement systems. Aircraft should provide accurate in-situ validation sensors for the space and ground systems and carry high-resolution remote sensing capabilities covering the full troposphere. With new lidar-based in-situ and remote water vapor sensing systems, HIAPER could provide synoptic-scale maps of water vapor over land or ocean, high-resolution profiles covering full daytime or nighttime cycles, and full tropospheric water vapor profiles across all of North America or an equally large remote region. No research aircraft today provides such capabilities.

Winter 1996-97 flooding events on the U.S. west coast underscore the need for improved medium-range forecasting of amount and timing of heavy precipitation associated with extratropical cyclones, particularly for storm systems on the eastern edge of large oceans. Improved short-term forecasts require improved understanding of details of these storm systems, including frontogenesis, frontal storm structure, storm-to-storm interactions, and storm momentum, heat, and moisture transports. Observations of these storm systems require aircraft with the capabilities envisioned for HIAPER: the range to fly to distant weather; the capability to measure properties of the storm system at many altitudes in the troposphere and lower stratosphere; and the payload to carry a comprehensive instrumentation package.

2.2 Atmospheric Chemistry

2.2.1 Atmospheric Kinetics And Photochemistry

Understanding the current atmospheric chemical composition, and especially how the future atmospheric composition will evolve due to changing concentrations of several important trace components, requires a fundamental, quantitative understanding of individual photochemical processes involving hundreds of short- and long-lived components. For example, many quantitative details of OH-related processes, especially of the production of OH by ozone photolysis, remain undetermined, even though OH represents the primary "cleansing" (oxidizing) agent for many sulfur, nitrogen, hydrocarbon, and halogen emissions. Likewise, trends in global tropospheric ozone remain unpredictable without better understanding of the kinetics and mechanisms of photo-oxidation of primary biogenic hydrocarbons. All these compounds and reactions occur throughout the troposphere, interact with aerosols and ice particles in the upper troposphere, and depend strongly on stratosphere-troposphere exchange of ozone and water vapor. Understanding these processes requires a capability to lift complex payloads to upper tropospheric altitudes over continental as well as remote polar and oceanic regions.

2.2.2 Chemical Processes, Aerosols, and Air Quality

The complex chemical system of the atmosphere interacts internally, especially within the troposphere and stratosphere, and externally with other significant components of the earth system: the ocean and oceanic biota, the land and terrestrial vegetation and populations. Predicting changes to the chemical composition of the atmosphere, and consequent effects on health and climate, requires improved representation of chemical processes in climate and forecast models and improved observations and quantification of major chemical processes.

These processes include: the full production and destruction terms for tropospheric and stratospheric ozone; the emissions of reactive and in some cases noxious materials by natural terrestrial vegetation or oceanic microorganisms, biomass burning, and human activities; and rates, reactions, and feedbacks involved in global carbon, nitrogen, and sulfur cycles. In almost all cases, these chemical processes involve scale interactions between local sources and regional weather and hydrological conditions. They often involve important reactions on regional scales, in topographic basins or within coastal circulation systems, with transport of products to larger, even global scales. Increasingly, large urban population centers produce not only local but regional and continental air-quality problems. These processes involve significant daily variations due to photochemical cycles and to daily changes in circulation patterns. All the processes interact significantly with other chemical, biological and hydrological processes. Terrestrial emissions affect ozone, while ozone effects plant growth, nutrient uptake, and subsequent emissions. Nitrogen abundance affects carbon processing in terrestrial and marine ecosystems. Storms modify the chemistry of boundary layer air and transport products to higher altitudes. Precipitation processes move atmospheric components to land or ocean. Understanding these interactive processes across the planet requires an aircraft with great range and wide payload flexibility.

Aerosols significantly impact the chemical properties of the atmosphere. Like many chemical components, aerosols can evolve from local oceanic or terrestrial sources and develop as a result of reactions that occur on hourly or daily time scales. In the atmosphere, aerosols continue to evolve and can disperse over global scales in days to weeks. In the stratosphere, heterogeneous reactions are a dominant mechanism for ozone destruction. In the troposphere, aerosols play a significant role in acid rain production, and large but unquantified roles in tropospheric heterogeneous chemistry, in cloud production and modification, and in general precipitation. Researchers have very little information about the transport of aerosols from the troposphere to the stratosphere, especially in tropical regions that may represent important sources of stratospheric aerosols. Changing aerosol loads in the stratosphere, from human activities or volcanic eruptions, may exert strong influence on the heterogeneous chemical processes controlling stratospheric ozone depletion.

Quantifying these enormously complex chemical processes requires relatively "fast" yet highly specific instruments deployed over a full range of local, regional, and global scales and over full diurnal or nocturnal cycles. An aircraft with the range, endurance, altitude, and payload capabilities of HIAPER will provide a significant increase in capability for atmospheric chemistry and air quality research. Ironically, aircraft themselves, particularly emissions from commercial air traffic, represent a growing concern in air quality, chemistry and climate change; accordingly we require observations within and above air traffic lanes.

Regional deterioration in air quality already produces large health and financial consequences. These effects occasionally spread to continental and even hemispheric scales. For much of the world's population, changes in air quality may represent the most immediate and most negative aspect of climate change. The performance capabilities envisioned for HIAPER and the advanced chemistry instrumentation that will accompany it represent a unique and important resource for regional and global atmospheric chemistry research.

2.3 Climate

2.3.1 Cloud Systems

The distribution, evolution, and properties of clouds play very large roles in the earth's energy budget and hydrological cycle. Cloud particles and the dynamics of cloud systems may also play large roles in atmospheric chemistry. Clouds themselves couple closely with local, regional, and large-scale atmospheric dynamics and in many regions play an important role in air-sea interactions. Many U.S. and international research programs focus on various aspects of clouds and cloud distribution. Cloud research, and the need to model clouds correctly, extends throughout the troposphere, from marine stratus to high cirrus. The Cirrus Regional Study of Tropical Anvils and Layers (CRYSTAL) draft science plan presents an urgent need to focus on upper tropospheric cloud generation, regeneration and dissipation. Other cloud research focuses on precipitating clouds in convective storms and on non-precipitating layer clouds over a variety of coastal regions. The study of all these aspects of clouds, in all these important regions, across the full lifecycles of various cloud systems, requires an aircraft with enormous range, great endurance, the ability to explore the full troposphere and the flexibility to carry a variety of in-situ and remote sensing instruments.

2.3.2 Radiation and Aerosols

Understanding the radiative energy balance of the earth system requires a quantitative understanding of radiation transmission and absorption within the atmosphere and of reflection or re-radiation from the underlying land, ocean or ice surfaces. In the atmosphere, temperature and three principal atmospheric constituents - clouds, water vapor, and aerosols - have direct and substantial impact on radiative transfers. Quantifying the influence of each of these factors requires direct measurements throughout the troposphere in all regions of the planet. Tropical regions (with moist boundary layers, dry middle layers, periodic large storm systems and persistent upper-tropospheric cirrus clouds) and polar regions (with complex surface properties and cloud systems) present particular challenges. Questions about ice microphysics and tropical cirrus clouds loom especially large in attempts to understand and quantify cloud effects on radiation budgets.

Currently, the direct roles of aerosols in absorbing and scattering radiation and their indirect roles in cloud formation represent some of the most challenging questions in cloud and particle microphysics, in chemistry and in climate. With their wide altitude (surface to stratosphere) and geographic (regional to global) distributions, their wide variations in size, abundance and composition, and their intimate dependence on atmospheric dynamics and atmospheric properties, aerosols present one of the most difficult observational challenges in atmospheric research. HIAPER with accurate radiation and water vapor sensors, advanced particle probes and efficient aerosol inlets, lidar remote sensing of backscatter and extinction, full tropospheric altitude coverage, and wide geographic range, will provide an ideal, literally unmatched, capability for aerosol and radiation research.

2.3.3 Ocean-Atmosphere Interactions

Understanding climate and weather requires an understanding of air-sea interactions in a variety of regions: in the tropical Western Pacific; in the deep-water formation regions of the North Atlantic; in the monsoonal regions of the Indian Ocean; along northern hemisphere storm tracks; in the leads and ponds of the Arctic; and in the circumpolar currents of the Antarctic. Moored and drifting instruments and ships provide the backbone of observations, supplemented importantly by satellites. Aircraft traditionally play a remote sensing role, dropping atmospheric and ocean sensors and sensing sea surface temperature. HIAPER's ability to cross ocean basins in a single flight, its advanced infrared sensors and automated launching system for next generation dropsondes and expendable bathythermographs, will enable a broad range of oceanic observations.

Increasingly, however, ocean-atmosphere research requires more than just sea-surface temperatures and surface wind stresses. For example, regions of extensive marine stratus clouds, often with distinct diurnal variations in coverage and optical thickness, present a challenge to climate and forecast models. A platform like HIAPER, with the ability to reach and cover remote marine stratus regions, and to measure fluxes and sea surface temperatures below, microphysics within, and backscatter above these clouds, offers an important opportunity for understanding the development and evolution of these systems.

Ocean-atmosphere interactions also include significant trace-gas fluxes between air and sea. Fluxes of some tracers, such as of dimethylsulfide (DMS), represent an important source for the formation of marine sulfate aerosols. Measuring DMS fluxes in the atmosphere also provides information about the distribution, abundance and nutritive status of microorganisms in the underlying ocean. The net fluxes of other biologically-mediated compounds with important greenhouse or ozone depletion effects, such as of methyl bromide, remain largely unknown over large areas of the ocean. HIAPER, with fast, sensitive detectors for CO2, DMS, and other important tracers, and active and passive remote sensors for ocean color and ocean biota, will provide an important supplement to ship-based measurements.

The use of automated sensor systems in ocean research grows rapidly. Various types of these sensor systems follow water masses at preselected or adjustable depths, profile over hundreds to several thousands of meters on predetermined or downloaded schedules, and measure currents within a fixed navigation array regularly or in response to specific velocity changes. Increasingly, the systems include sensors for biological and chemical components as well as for temperature, salinity or velocity. All of the sensor systems communicate to ship or shore, generally through satellite links when the system resides at the surface. For specific research applications, however, and especially during the development and testing phases of many of these systems, having an aircraft to provide communications links offers significant advantages. An aircraft such as HIAPER, with range sufficient to fly over most ocean basins, would provide increased bandwidth due to line-of-site links and offer the ability to interrogate and redirect an array of sensor systems within a few hour's time.

2.4 Other Scientific Opportunities

2.4.1 Polar Research

As described earlier in this section, improved understanding of climate requires improved understanding of energy budgets and hydrological processes in polar regions. The range of an aircraft like HIAPER enables a large increase in atmospheric research capabilities over polar regions, particularly suited to studies of polar ozone. With appropriate remote sensing instruments, HIAPER could also provide important information about other polar processes. Advanced remote sensing techniques could allow determinations of ice and snow properties, ice volume, and ice dynamics in the Arctic and Antarctica. Remote sensors of ocean properties could allow investigation of biological productivity in Arctic seas or Antarctic margins; biological processes in these regions can have important influences on global nutrient and carbon budgets. HIAPER measurements could provide high-resolution maps of ozone distribution and UV irradiance in polar regions, to aid in the understanding and prediction of UV exposure for high-latitude marine and terrestrial ecosystems and for human populations.

2.4.2 Biological and Ecological Research

Large-scale atmospheric factors (visible and UV radiation, precipitation and humidity, lower tropospheric air quality) play important roles in controlling the productivity of natural and managed biological systems. Moisture and chemical emissions from these systems in turn influence atmospheric processes. HIAPER should support a wide range of regional and continental-scale measurements of atmospheric properties and of fluxes between the surface and the atmosphere. With appropriate remote sensing systems, HIAPER could also provide mapping and surveying capabilities for a variety of other large-scale biological and ecological factors: habitat extent or loss; vegetation distributions; and ecosystem productivity, quality or stress. HIAPER range and endurance should prove especially useful for surveys and assessments of remote marine ecosystems.

2.4.3 Upper Atmosphere Observations

Ground-based observations of mesospheric elements such as Na, K, Li, Fe, and Ca suggest that densities of these constituents exhibit considerable variabilities related to seasonal and latitudinal variations of the mesopause thermal structure. These upper regions of the atmosphere may offer sensitive and early indications of global climate change. Up-looking airborne lidars, deployed on HIAPER above most of the tropospheric water vapor and clouds, could provide information on the altitude and geographic extent of polar mesospheric clouds as well as on the geographic variability of many mesospheric constituents.

2.4.4 Satellite Calibration And Validations

Within the next five years, NASA will launch satellites and remote sensors of the Earth Observing System
(EOS). The EOS program depends on a broad spectrum of research and validation from investigators around the world. NSF-funded researchers will incorporate new satellite measurements into their studies of climate, atmospheric chemistry and atmospheric dynamics. All these space-based sensors incorporate significant but largely unvalidated assumptions about trace chemical constituents and aerosol abundance, distributions and scattering properties. Extensive and reliable calibration and validation requires aircraft underflights of satellite orbits, with instruments traceable to absolute calibration standards. HIAPER's altitude capability, payload flexibility and extended range will make it an ideal platform for these missions. For example, HIAPER will be able to fly long flight segments that coincide with a single satellite ground track or that cross multiple tracks, enabling maximum intercomparison between aircraft and satellite measurements.

3. Planning Environment

This section provides:

  • An overview of current and projected capabilities in research aviation;
  • Discussion of relevant technological developments outside of aviation; and
  • A summary of community planning leading to this proposed HIAPER plan.

3.1 U.S. and International Research Fleets

In general and with few exceptions, funding limitations in recent years have made it difficult for U.S. and international research aircraft fleets to modernize in response to advancing scientific needs. NASA operates the DC-8, two ER-2s and two WB-57Fs. The DC-8 remains a workhorse for atmospheric chemistry and a wide variety of remote sensing missions, but does not have the altitude capabilities needed for upper troposphere/lower stratosphere (UT/LS) research. The ER-2s have new engines and other upgrades, but still carry relatively limited payloads and work primarily at altitudes above 60,000 ft. The WB-57Fs have payload and operational limitations similar to the ER-2s and will probably become increasingly expensive to operate over the next decade.

The National Oceanic and Atmospheric Administration (NOAA) continues to operate two P-3 aircraft for hurricane reconnaissance and general research. Those aircraft generally do not operate above 30,000 ft. NOAA has one of the rare new aircraft in the U.S. research fleet in their Gulfstream-IV, which plays a substantial role in NOAA's hurricane and winter storm missions. The NOAA G-IV requires additional infrastructure to expand its research capabilities.

Many European countries operate small turboprop or jet aircraft, with very limited range, payload and altitude capabilities. The United Kingdom has a C-130 with range and payload capabilities similar to NOAA's P-3s and the C-130 at NCAR. French plans for aircraft modernization seem likely to continue to focus on small turboprops. The Germans have discontinued work on their Strato-2C. Several European research groups lease time on a Russian aircraft to obtain very high altitude capability similar to that of an ER-2 or a WB-57F.

In summary, the U.S. fleet has several highly capable general-purpose aircraft and a few specialty, very-high altitude platforms, but nothing that provides the range, altitude and payload capabilities envisioned for HIAPER. In general, the U.S. agencies have had very few opportunities for serious modernization plans other than those provided by the NOAA Gulfstream-IV and by HIAPER. International aviation groups would have to consolidate their current efforts to develop a plan for an aircraft of the magnitude of HIAPER. Thus, HIAPER represents a significant and much-needed step forward domestically and internationally.

3.1.1 NSF Aircraft

NSF currently supports two large research aircraft at NCAR: an aging Electra and a relatively modern refurbished C-130. Figure 1 shows the altitude and payload capabilities of these and other NSF aircraft along with projected capabilities for HIAPER.

3.1.1.1 NSF's Electra at NCAR

The Electra has a modern data system and will soon have satellite communication systems. With parts from a spare Electra acquired by NSF from NASA, ATD can continue to operate the Electra for several years. Soon, however, we must replace the Electra and transfer the Electra Doppler Radar (ELDORA) to another platform. For engineering, scientific, and operational reasons, ELDORA should go on a P-3, operated by NCAR or by another agency. All planning in this document assumes that we will cease operating the Electra as HIAPER comes into service.

3.1.1.2 NSF's C-130 at NCAR

The C-130 will provide reliable support for a wide variety of payloads and a broad range of missions up to altitudes of 28,000 ft for at least the next two decades. It will carry large payloads and provide unique infrastructure to atmospheric chemistry, cloud physics and radiation, large-scale surface flux and various remote-sensing missions. ATD will implement specific upgrades to further improve the infrastructure of this highly capable aircraft. At a minimum these upgrades will include:

3.1.1.3 Other NSF-supported Aircraft

The University of Wyoming King Air, partially supported by NSF, provides a good payload capability for boundary layer, atmospheric chemistry and other missions. The King Air should provide at least another decade of very useful service. A T-28 storm penetration aircraft, operated by the South Dakota School of Mines and Technology with NSF support, has a limited lifetime. NSF will determine the need for a replacement penetration aircraft over the next several years.

Figure 1. NSF-Supported Aircraft

3.2 Technological Developments for Modern Research Aircraft

3.2.1 Miniaturization and Digital Technologies

The growth in personal digital devices, from cell phones to digital cameras to GPS receivers, drives important trends in cost, size and capabilities of small signal processing and data storage capabilities. Reductions in size, weight and power consumption feed directly into the design and implementation of HIAPER instrumentation. For example, new GPS chips that incorporate full signal processing into the sonde itself will allow fully automated operation of
GPS dropsondes from HIAPER, thereby reducing the need for on-board electronics and operator. The HIAPER data system will use small flash card or miniature hard drive memory technologies derived from digital cameras to replace central tape drives, again saving space while reducing power consumption and weight. Commercial needs and developments will produce lower-cost, higher-powered laser sources over a wide range of wavelengths. Tunable diode laser technology will enable precise measurements at water vapor and atmospheric trace gas wavelengths. Sensitive arrays of charge-coupled devices may supplant conventional optical detectors.

NCAR, other national laboratories, and many university groups already explore these new technologies. The entire HIAPER infrastructure will incorporate these emerging technologies at the onset and through flexible upgrade planning. The HIAPER development occurs at an opportune time to stimulate inclusion of these new technologies into research instrumentation.

3.2.2 Communications

A modern research aircraft in flight should "look" and perform like any other node in the global communications system. It should have a phone number, an internet address and a real-time web page. It should provide easy and rapid voice, data and imagery transmission over all networks. Today, many aircraft provide air-to-ground and ground-to-air phone services. Anybody can follow the instantaneous progress of any domestic commercial flight via the web. By the time, or shortly after, HIAPER enters service, students will have the ability to monitor a flight and view data from their classrooms and laboratories. Automated instruments will communicate with ground-based controllers. All modern communications technologies push in these directions. Growth in NCAR and UCAR capabilities in data processing, data distribution, and information management and technology, through ATD, UCAR's UNIDATA program, and other groups, will match the growth in commercial technologies and services and allow HIAPER to take full advantage of new and expanded communication systems.

3.3 Community Planning for a Mid-Sized Jet Aircraft

Together, NCAR and the university research community have engaged in a long and thorough discussion of needs and options for next-generation aircraft. From as early as 1982, a series of community reports on research aircraft have consistently and unanimously identified compelling scientific need for a platform with the altitude and range capabilities of a modern mid-sized jet aircraft. Two NCAR Technical Notes, published in 19891 and 19922, reported community discussion of aircraft options and community consensus on capabilities needed in a mid-sized jet. Twice, NCAR convened independent panels of university researchers to review the plans reported in these Technical Notes. In 1989 and again in 1992, those review panels urged NCAR and NSF to acquire a mid-sized jet.

NSF designated a modern jet aircraft as a high priority acquisition in various planning documents. A strategic plan for atmospheric sciences, produced jointly in 1994 by the Division of Atmospheric Sciences (ATM) and UCAR, described scientific justification for a mid-sized jet and listed a new jet, new supercomputing and a new incoherent scattering radar for a polar cap observatory as highest priorities for geoscience facility upgrades. Three recent long-range plans for NSF's Geosciences Directorate (1995 to 1999, 1997 to 2001 and 1998 to 2002) call for upgrades to atmospheric observing facilities; the most recent plan explicitly identifies the need for a mid-sized jet. The NSF decision to request funding for HIAPER thus derives from and responds to long-recognized needs among a wide range of atmospheric science researchers. NCAR has played a central, catalytic role in developing community consensus.

On behalf of the scientific community, ATM, working with ATD, produced a Project Development Plan (PDP) for a modern, mid-sized, high-altitude jet. The National Science Board (NSB) endorsed that plan in August 1997. Now, NSF has requested that NCAR, in its capacity as a Federally Funded Research and Development Center, undertake the overall acquisition of that aircraft.

4. Project Organization and Management

Readers will find the following in this chapter:

  • ATD's staffing, management, and oversight plans;
  • Our vision of community involvement in HIAPER, including results of the recent community survey; and
  • Plans for community involvement in instrumentation.

We use "community" in the broadest sense, starting with university and NCAR researchers and including sponsors and managers.

NCAR plans the overall HIAPER effort to meet community needs. Meeting those needs requires extensive community involvement. The university community interacts with NCAR at all levels, from the UCAR Board of Trustees and various UCAR committees to day-to-day scientific collaboration among university and NCAR scientists. The 1996 NSF panel that reviewed NCAR found that

This pattern of broad community oversight and specific community interaction will guide all aspects of the HIAPER procurement from acquisition through instrumentation to operation.

4.1 Project Organization and Staffing

A HIAPER Integrated Project Team (HIPT) will undertake the actual work of acquiring HIAPER. Primary members of HIPT will include the Project Leader, Project Manager, Scientific Coordinator, technical and scientific project staff from ATD, NCAR, UCAR, and advisors from the U.S. Air Force (USAF) Commercial Aircraft Integrated Product Team (CAIPT). HIPT will interact with community advisory and oversight groups including a newly-commissioned NSF Oversight Committee (NOC) focused on fiscal, contractual and business-related matters and a new NCAR HIAPER Advisory Committee (HAC) focused on scientific and technical matters. The exact composition of HIPT and its interactions with oversight groups and the community will evolve according to task and need, but HIPT will remain under the direct leadership and guidance of the Director of ATD, David Carlson, who reports to the Director of NCAR, Robert Serafin. Final responsibility for decisions on selection of an aircraft source and on award of instrumentation contracts lies with the NCAR Director. Key positions thus include the NCAR Director, ATD Director, HIAPER Project Manager, HIAPER Scientific Coordinator, UCAR Associate Vice President for Business Services, and USAF CAIPT leader Jim Warren. The Supplementary section provides biographical information for Serafin, Carlson, Reaves, and Warren. Figure 2 provides a schematic summary of these groups.

4.2 HIAPER Integrated Project Team

The HIPT will reside within ATD at NCAR. ATD includes a Research Aviation Facility
(RAF), a Remote Sensing Facility, a Surface and Soundings System Facility, and Research Data and Design and Fabrication (DFS) services. Staff from all of these groups will contribute to the HIAPER effort.

The HIPT will include eleven permanent members (Figure 3). A full-time project manager will oversee and coordinate all procurement-related tasks (Tasks 1 and 2, Define Specifications and Aircraft Acquisition, detailed in Sections 5.1 and 5.2). The Project Manager, not yet selected, will have experience in aircraft procurement, modification and operations. She or he will have direct responsibility for interactions with the USAF CAIPT.

The HIPT will include a Scientific Coordinator. That person will have responsibility to plan and lead various workshops (see below) and to ensure effective interaction with technical advisory groups and the HAC. In particular, the Science Coordinator and ATD Director will work to include scientists from outside of traditional atmospheric research areas in various HIAPER planning activities. One person from the UCAR Contracts Office will devote full time to the HIAPER effort, with help from other UCAR contract and procurement staff as needed. The ATD Administrator will oversee budget monitoring and reporting functions. Table 3 lists all permanent HIPT members and their primary responsibilities.

The USAF CAIPT has extensive experience in the acquisition of commercial aircraft for the armed forces, and has assisted other federal agencies in such activities. The CAIPT seeks "to acquire and support commercial aircraft systems in partnership with customers by using innovative and streamlined acquisition practices to provide best-value products to satisfy customer's need." The CAIPT staff includes some of the most expert members of the USAF acquisition community, with extensive experience in federal acquisition processes as well as in USAF and civil domestic and international air operations. CAIPT will provide expertise in acquisition, certification, logistics, operations, contracting, and scheduling to the HIPT. Section 7 describes CAIPT experience and qualifications.

Figure 2. Project Organization

 
Figure 3. HIPT Membership

 

Table 3. HIPT Membership by Name and Primary Responsibility

Position Incumbent Responsibilities & Duties
Leader, ATD Director David Carlson Leadership; Staffing; Reporting; Community involvement; Recommends major acquisitions to HAC and NCAR Director
UCAR Assoc. VP Jeff Reaves Authorizes all UCAR commitments; Oversees overall procurement activities
Project Manager Not yet selected Overall Project Management; Reporting; Interactions with CAIPT
Scientific Coordinator Not yet selected Planning; Source Selection; Community Involvement
RAF Manager Paul Herzegh Planning; Source Selection; Coordinate with RAF activities
RAF Operations Chief Henry Boynton Planning; Source Selection; Training & Safety; Acceptance & Testing
RAF Aeronautical Engineer Not yet selected Planning; Modifications; Instrument integration
CAIPT Team Leader Jim Warren Advise Requirements, Acquisition, and Acceptance Processes
DFS Manager Jack Fox Modifications, Instrumentation Support
UCAR Contracts Administrator Carolyn Simerly RFP, Contracts, Negotiations
ATD Administrator Sandra Nilsson Budget oversight

4.2.1 Other Staffing

To supplement activities of the HIPT, ATD and NCAR staff will provide very substantial additional effort on many aspects of the overall HIAPER effort. The NCAR Advanced Study Program Director, William (Al) Cooper, will continue to play a leading role in the development of community plans for research instrumentation. Scientists from NCAR's Atmospheric Chemistry, Mesoscale and Microscale Meteorology, and Climate and Global Dynamics divisions will participate in community planning for instrumentation. The ATD Assistant Director will support the ATD Director throughout the procurement. Engineers and technicians from ATD will work on HIAPER research infrastructure, instrumentation, and system integration and testing.

Throughout the acquisition, instrumentation, and preparation of HIAPER for operations, the cumulative UCAR/NCAR/ATD effort, including supporting efforts from CAIPT, will exceed 60 full-time equivalent (FTE) over five years. Table 4 summarizes the combined FTE effort of the many individuals involved in HIAPER tasks.

Table 4. Summary of Effort in FTE

4.2.2 Master Schedule

Figure 4 lays out the overall schedule for HIAPER activities. Overall, the acquisition covers five years. We have assumed two years from award of a contract to delivery of a modified aircraft. Changes in that schedule will produce changes in the schedules for all subsequent tasks. Significant effort, especially in community planning, occurs in FY 1999, toward a goal of issuing a contract for an aircraft early in FY 2000.

Figure 4. Master Schedule

4.3 Oversight

4.3.1 NSF Oversight

The NOC, as specified in the HIAPER Memorandum to the NSB (provided separately to reviewers), will review and approve major procurement actions and other HIAPER activities to ensure compliance with the policies and responsibilities specified by the UCAR-NSF Cooperative Agreement and, in particular, by the HIAPER Scientific Program Order (SPO). The NOC will receive and review the various in-progress and final reports of the HIPT. It will include members from several NSF units: Budget Division; Grants and Contracts; Division of Contracts, Policy, and Oversight; Office of General Council; Office of the Assistant Director for Geosciences; and the UCAR and Lower Atmospheric Facilities Oversight Section (ULAFOS) in ATM.

4.3.2 NCAR and UCAR Oversight

The HAC will review the work and recommendations of the HIPT and advise the NCAR Director on actions and responses. In particular, recommendations on aircraft platform, source, and major structural modifications will come from HIPT to the HAC for discussion, review and endorsement. HAC will include three scientists from the university community, two NCAR scientists or directors of NCAR scientific divisions and representatives from NSF and from NSF's Observing Facilities Advisory Panel (OFAP). Members of the HAC will use their broad experience to guide HIAPER development in directions that ensure maximum benefit for a wide group of users. The HAC, reporting through the NCAR Director, will provide an oversight function on behalf of the UCAR President, Richard Anthes, and the UCAR Board of Trustees.

The members of the HAC will participate in workshops and other advisory group processes developed by the HIPT. In particular, the HAC will work with the HIPT Scientific Coordinator to ensure effective community involvement in key aspects of HIAPER planning.

The HAC will endorse guidelines for instrument development, covering desired capabilities and size, weight, and power constraints. Working from recommendations provided by technical advisory groups and review panels, the HAC will recommend highest priority instrument developments.

4.3.2.1 Financial Oversight

Funding for HIAPER will occur through a special SPO as part of the NSF-UCAR Cooperative Agreement. To ensure regulatory compliance, enhance current administrative policies and procedures and provide a consistent methodology for applying existing rules to various aspects of the HIAPER acquisition, UCAR may issue special guidelines to cover certain HIAPER procedures or clarify information already in the Cooperative Agreement. These HIAPER guidelines will derive from and be consistent with specifications in the SPO and other provisions of the Cooperative Agreement. UCAR will set up special accounts to cover HIAPER activities.

UCAR provides a modern on-line cost accounting system with full information access. ATD processes the UCAR information through a web-based access and monitoring system. HIAPER managers, administrators, project leaders and oversight groups can each take advantage of fast electronic access to HIAPER financial information: expenditures to date, projected expenditures, cost to completion, and breakdowns of all expenditures and estimates by cost category (salary, travel, equipment, etc.) and by task and sub-task.

4.4 Community Involvement

Members of the research community, including researchers from disciplines outside atmospheric sciences, will have multiple opportunities to advise and otherwise participate in the development of HIAPER plans and the development of HIAPER instrumentation. The HAC, described above, represents one primary mechanism for community involvement and oversight. Other mechanisms include participation in various technical advisory groups organized during specific aspects of the acquisition process, information exchange with the OFAP, participation in various surveys and workshops and development of HIAPER instrumentation (Section 4.5).

4.4.1 Technical Advisory Groups

These groups will provide technical advice on desired capabilities, desired structural modifications, and on desired primary and specialized instrumentation. Some groups will consist of experts gathered for specific discussions, such as, for example, the workshop summary groups for modifications and instrumentation, discussed in the next section. OFAP, a group of community researchers which meets regularly to evaluate requests for use of NSF's observing facilities, will hear regular reports on HIAPER activities from the ATD Director, Project Manager or Scientific Coordinator. Because OFAP will eventually evaluate requests for HIAPER usage, the OFAP members can serve as valuable mechanisms for advice and for informing the larger community about HIAPER plans, progress and schedules.

4.4.2 Surveys and Workshops

ATD conducted a survey of community needs and priorities for HIAPER in the summer of 1998. That survey went to approximately 150 potential users across a wide range of research specialties covering geo- and environmental sciences. More than one third of those contacted responded. Responses came from: university researchers (66%); NCAR researchers (17%); and other national laboratories (17%). We discuss results from this survey in Section 5.1 under Task 1, Defining Specifications. ATD will request additional information from this list of potential users as needed during the course of HIAPER acquisition. As HIAPER plans and schedules become better known, ATD will work with NSF program managers within and outside the Geosciences Directorate to develop a broader list of potential users for additional survey and information purposes.

Early in 1999, ATD will convene an airborne instrumentation workshop to develop community priorities for measurement capabilities related to primary scientific missions of the aircraft. A subset of attendees from that workshop will develop: a composite set of needs for primary (always on the aircraft) instrumentation; preliminary needs for specialized instruments; and desirable airframe modifications. Recommendations from this workshop summary group, particularly for desirable structural modifications driven by instrument needs, will go to the HAC for review and endorsement in time to play a useful role in the preparation of a draft Request for Proposal (RFP).

After awarding a contract and setting final specifications for structural modifications, ATD will convene a second instrumentation workshop to discuss guidelines, needs, and opportunities for special research instruments, HIAPER-compatible instruments deployed according to project needs. The research instrument guidelines will include space, weight, and power requirements, as well as requisite data format, processing and transmission capabilities. The HAC will review these instrumentation guidelines. These guidelines will feed into the instrumentation RFP process. Late in the acquisition process, as instrument capabilities and operational schedules become clear, ATD and OFAP will host a HIAPER users' conference, to discuss all aspects of operations, payload, instrumentation, communications, mission planning and data quality. A web-based report from this workshop will guide a wider audience of potential users in their planning for future HIAPER research missions.

4.5 Instrumentation

ATD, working with the HAC, will undertake extensive community involvement in developing instrumentation plans for HIAPER, primarily through the two community workshops described above. The community, working independently or with ATD, will carry out a large fraction of the specific instrument developments. Section 5.4 provides extensive descriptions of desirable primary instruments and of options and opportunities for special instruments. Section 5.4 also discusses specific mechanisms by which ATD, NCAR, and university investigators can cooperate on all aspects of instrument planning and development. Here we discuss the community-based process for selecting primary and specialty instruments for HIAPER.

4.5.1 Identifying and Selecting Candidate Instruments

The first community workshop will focus on primary instruments and essential modifications, and the second on specialty instruments. We intend that the HIAPER-specific funding for instrumentation requested in this plan will support primarily those instruments designed specifically for easy installation on and integration with HIAPER research infrastructure. However, we recognize that a flexible research infrastructure on HIAPER must allow deployment of highly specific user-produced research instruments that do not fit a 'plug-and-play' model. HIAPER funding could also support the modification of existing instruments or the combination of existing instruments with an intermediate infrastructure to allow integration with HIAPER. We propose the following steps to select and manage instrument development projects. Please note that the solicitation, evaluation and selection processes would occur once or perhaps twice during the first and second years of the overall HIAPER acquisition.

Solicitation of Proposals: Using instrument guidelines endorsed by the HAC, UCAR will solicit proposals from the community. The solicitation will explicitly allow preliminary funding for potential instrumentation that requires further design and evaluation. The solicitation will invite proposals from universities, NCAR, universities in partnership with ATD, each other, or industry and from other national and international laboratories. ATD's design and fabrication group will provide design assistance and fabrication cost estimates to instrument developers who desire such assistance. We will require each instrument proposal to specify long-term arrangements for instrument and data support.

Review and Evaluation: ATM Program Managers will conduct a standard NSF merit review of all proposals. The Program Managers will present results of those reviews with their recommendations to a special review panel focused on HIAPER instrumentation. Panel recommendations will then go to the HAC for final review and recommendation. The HAC at this point should include participation from ATM Program Managers.

Contract Award: UCAR, in consultation with NSF, will issue contracts for each instrument development, consistent with the recommendations of the HAC. These contracts will include specific performance expectations and schedules and will specify design guidelines and restrictions, acceptance testing, long-term operations and calibration support, ownership and intellectual property rights, and data rights and responsibilities. These contracts will cover instrument development through an initial testing and deployment period; they will not pay for on-going operations or future research. Where appropriate, instrument contracts may set specific standards and procedures for accepting the instrument for flight testing.

Project Monitoring: The HIPT and appropriate technical advisory groups will monitor designs and progress and report all such information to the HAC and the NOC. ATD's aviation group, RAF, will provide appropriate assistance regarding airworthiness requirements, options for minimizing weight and power, and integration with the HIAPER data system. Most projects will include a specific design review by ATD, HIPT, and other experts. Subsequent performance milestones may include demonstration of measurement accuracy on the ground, certification of airworthiness and safety, and definition of calibration and operational procedures.

4.5.2 Testing, Evaluation, and Deployment

RAF will collaborate with instrument developers on testing as specified in each contract. Where possible, such tests should include intercomparisons and traceable calibrations. Each instrument development should include an explicit characterization of measurement uncertainty, preferably following uncertainty analysis methods adopted by engineering societies such as the American Society of Mechanical Engineers.

Deployment and ownership of primary instruments will become the responsibility of ATD and should require only occasional interactions with the developers for troubleshooting or for issues related to calibration. For specialized instruments, initial deployments may require assistance and participation from the developers, who may also assume initial data processing and distribution responsibilities. Eventually, each special research instrument must revert to long-term support arrangements as specified in the development contract. Instruments developed with HIAPER funding must provide a plan for data validation and for timely provision of data to ATD.

4.6 Reporting

The HIPT will report monthly to the NOC. During certain stages of the acquisition process, leaders of HIPT will hold quarterly face-to-face meetings with the NOC. Members of the HAC will join the quarterly meetings as appropriate and necessary. Whenever practical and allowable, all formal reports, all meeting presentations and notes or minutes of all meetings will reside in a web-based HIAPER internet information system, with full community access or partitioned access for specific groups by specific permission as appropriate.3 This internet information system will provide overview and summary documents and searchable contents and index capabilities to guide the viewer through levels of increasing detail.

HIPT monthly electronic reports will also reach the HAC. The ATD Director will also provide summary and look-ahead reports to the HAC every six months, ideally in cycle with UCAR Board of Trustees meetings so that recommendations or concerns of the Advisory Group can go through the NCAR Director or UCAR President to Board members as appropriate.

Other specific reporting functions and responsibilities lie within specific tasks and especially within specific contracts. The discussion of processes for selecting and funding instrumentation above suggested possible reporting mechanisms for inclusion in any instrumentation development contract. The detailed discussion of the airframe procurement (Task 2, Section 5.2) describes reporting and other oversight functions desirable in any airframe contract. In addition to these contractual responsibilities and to the periodic reports listed above, and to supplement community advisory and oversight functions already described, the ATD Director and/or HIAPER Project Manager will make regular reports to annual UCAR members meetings, to the UCAR University Relations Committee and at national geosciences meetings.

5. Description of Work

5.1 Task 1: Define Specifications

In this section we describe:

  • Preferences expressed in a community survey;
  • Performance and capability requirements; and
  • Some aspects of the procurement process.

The total estimated costs for Task 1, in 1998 dollars, are summarized below:

Task 1: Requirements FY 1999 FY 2000 FY 2001 FY 2002 FY 2003 Total
(8.75 FTE) Total 751,000 0 0 0 0 751,000

5.1.1 Community Priorities

As mentioned in Section 4.4.2, ATD conducted a survey of community intentions for HIAPER use and preferences for HIAPER capabilities. This survey was sent to scientists covering a broad range of sub-disciplines in lower atmospheric, upper atmospheric, oceanic, earth, and biological science. Overall, the research planned by the respondents largely echoes the scientific needs described in the previous chapter. Respondents most frequently listed: cloud-aerosol-radiation interaction studies; cloud microphysical studies related to precipitation and electrification; gas-phase and heterogeneous upper tropospheric chemistry; convective storm dynamics and convective influences on chemical and water vapor distributions; and air-sea interaction and evolution of marine cloud systems. In a majority of cases, users wanted access to remote oceanic and to tropical regions.

Respondents listed altitude as the most important capability for HIAPER, ahead of endurance, payload, and floor space. Figure 5 presents these overall preferences while Figure 6 gives details of preferred capabilities in each of the above categories: altitude, endurance, range, payload, and floor space. The survey recipients were given probable HIAPER characteristics as guidance, as well as details of the capabilities of current NCAR aircraft for comparison. Based on this information, the respondents clearly feel that their scientific intentions require high-altitude, long-range capabilities.

This initial survey represents the first phase of our outreach for broad-based scientific community input on HIAPER capabilities.

Figure 5. Community Priorities for HIAPER Capabilities, from HIAPER Survey

5.1.2 Defining Minimum Requirements and Desirable Capabilities

Known capabilities of modern high-altitude commercial jets provide range, altitude, and payload capabilities to meet a large majority of needs as expressed in the survey. Moreover, such aircraft will provide vastly more capability than any current NSF aircraft, and perhaps more overall versatility than any current or planned U.S. or international research aircraft. The acquisition process and particularly the setting of minimum requirements and desirable operational capabilities must result in a platform that can serve the maximum number of important scientific needs.

We start defining requirements by using the community survey results. These depart only slightly from preliminary NSF and NCAR descriptions of HIAPER as contained in early planning documents. In summary, they are:

Figure 6. Detailed Community Preferences, from HIAPER Survey

Beginning with these data, the HIPT will develop a formal HIAPER Requirements Document (HRD) by early CY 1999, using additional inputs from the first community instrumentation workshop discussed above. The HRD will specify two types of capabilities:

Working from mission specifications developed as part of earlier community mid-sized jet planning efforts, and from mission specifications that guided the recent NOAA procurement of a Gulfstream-IV, the HIPT will develop a draft set of mission scenarios for review at the first community instrumentation workshop. The workshop summary group (Section 4.4.2) will refine these mission scenarios, define a primary instrumentation package for each mission, and develop the resulting minimum requirements, desirable operational capabilities, and primary instrumentation lists. The HIPT will incorporate these recommendations into an initial HRD. After review by the HAC, HIPT will distribute the preliminary HRD to the community and to industry for consideration and comment. Subsequent versions of the HRD incorporating community and industry comments will eventually become part of the preliminary RFP.

5.1.3 Ensuring Competition

Ensuring competition is a goal of practical and ethical importance. We will solicit multiple responses to the HIAPER RFP from industry to provide competition and thus maximum capability in the selected aircraft. For this reason, the minimum requirements for HIAPER must be set at a level that will encourage responses from prospective vendors. Specifically, the minimum requirements must be set so that at least two commercially available aircraft can meet them, and thus ensure that at least two bids are possible. This will require that the HRD specifies realistic minimum requirements consistent with available aircraft. Extended or enhanced capabilities desired for HIAPER will influence the overall selection process through value-added, capability tradeoffs as described below.

5.1.4 Defining Tradeoffs and Analyzing Best Value

Selection of best-value alternatives for HIAPER will require capability tradeoffs up to the point where the marginal cost for a desirable capability that exceeds requirements loses its relative value.

The determination of minimum requirements and desirable capabilities of the aircraft will be the first step in the process of analyzing for best value. A ranked and weighted scale of desirable capabilities will be created to establish a relative value of these attributes. This scale will give vendors insight into the priorities of the desirable capabilities, will enable them to make appropriate business decisions concerning their offers, and will also be used to perform a cost-benefit analysis of priced options.

With the above information, we will conduct a two-phased approach, as described in the next two sections, to finalize the set of minimum requirements and desirable capabilities to be included in the RFP.

5.1.5 Vendors' Conference

This conference will be convened at NCAR's facilities in Boulder and Broomfield, CO. It will be designed to give the offerors a better understanding of NCAR's mission and capabilities through first-hand exposure to NCAR's aircraft operations, aircraft maintenance, engineering design and fabrication, and instrumentation support activities, and will include presentations and facility tours. This conference will also give offerors an opportunity to get answers to questions and to provide comments on the preliminary minimum requirements and desirable capabilities of the aircraft, as well as on HIAPER management and contracting strategies.

5.1.6 Configuration Definition Conferences

These conferences will be held after the draft RFP release at the facilities of each original equipment manufacturer (OEM) and/or offeror. The primary purpose of these meetings will be to give the acquisition team an opportunity to get answers to questions about the suitability of the commercial configuration likely to be offered. The team also will review the OEM's catalog and decide which options are required/desired for each proposed type of aircraft. Demonstration flights of candidate aircraft may be included as part of these conferences. Such flights will give the team members the opportunity to increase their knowledge of the candidate aircraft, as well as to better understand configuration options.

These conferences will also provide offerors an opportunity to provide and discuss their comments on the draft RFP. Further, the site visits will allow the acquisition team to see the offerors' facilities, meet their staff, and gain a better understanding of their manufacturing and modification (completion) capabilities and processes.

5.1.7 Community Involvement

Members of the HAC and of the NOC will attend the Vendors' Conference and the Configuration Definition Conferences as needed. Documents related to the HRD and the preliminary RFP will reside on the internet for community review and comment. The community workshops described earlier will provide primary input to these documents. The HAC will review both documents. OFAP will review the preliminary RFP at its spring 1999 meeting.

5.2 Task 2: Acquire Aircraft

In this section we discuss strategies and processes for the following activities:

  • Acquisition;
  • Program management;
  • Contracting;
  • Proposal Evaluation Plan;
  • Evaluation and decision criteria; and
  • Aircraft certification and acceptance.

The total estimated costs for Task 2, in 1998 dollars, are summarized below:

Task 2: Acquisition FY 1999 FY 2000 FY 2001 FY 2002 FY 2003 Total
(15.50 FTE) Total 147,000 45,535,000 184,000 88,000 0 45,954,000

5.2.1 Candidate Aircraft

Within the last 30 years the class of aircraft generally known as "business aircraft" has evolved to the point that several of these aircraft are prime candidates for applications to demanding research missions such as envisioned for HIAPER. Recognizing this, the USAF has increasingly moved to the acquisition of these and other commercial aircraft for many of its noncombat military missions.

For HIAPER, there are many potential candidates within this business aircraft class. These choices range among the three size classes listed below. (The passenger capacities shown represent what would be possible in an "airline" configuration, rather than what is typical in business use.) A few example aircraft are also listed, in alphabetical order, within each size class. These aircraft are all modern, fast, and jet-powered, but otherwise have a wide range of capabilities and prices.

Some of the aircraft types available in these size classes are not now in production. Although acquiring a used aircraft for HIAPER is not out of the question, we believe a new aircraft is more suitable in that it will maximize performance and longevity, as well as minimize risk.

A few general comments can be made about the characteristics of the aircraft in these size classes relative to what might be suitable for HIAPER. These are presented in Table 5.

Table 5. Relative General Characteristics of Available Business Aircraft

Aircraft Size Class Altitude Range and Endurance Payload Cabin Volume Cost (Purchase and Operations)
Light High Moderate Low Low Low
Mid-Sized High High Moderate Moderate Moderate
Heavy Moderate High Very High Very High High

  In addition to the attributes shown above, other factors will be highly important. For example, one critical factor is the ability of HIAPER to operate in fully loaded configuration from a variety of airports, including the existing RAF base at Jefferson County Airport (Jeffco). This requires examination of the candidate aircrafts' take-off performance, noise-generation characteristics, and maximum gross weight. Maximum gross weights for the light, mid- and heavy-size classes above are in the ranges of 20,000-40,000 lbs, 50,000-100,000 lbs, and 160,000-180,000 lbs, respectively. Because of runway strength limitations at Jeffco, it is unlikely that the latter class could operate there; acquiring any plane in this class would require that RAF either set up a separate operations base for HIAPER or move its entire base to another airport.

Two other examples of the many additional factors to be considered when narrowing down the list of candidate aircraft are design longevity and cabin loading flexibility. At least one of the available mid-sized business aircraft is designed for a minimum life of 20 years and 30,000 flight hours. NCAR routinely operates its research aircraft for over 20 years. At the anticipated usage rate for HIAPER, some 10,000-15,000 flight hours might be flown during that period. Cabin loading flexibility is important for HIAPER because of the diverse nature of typical research payloads. Thus an important attribute for HIAPER will be a wide range in the aircraft's forward-aft center-of-gravity limits.

Preliminary evaluation to date indicates that the most suitable candidates for HIAPER will come from the mid-sized business aircraft class. However, substantial additional interaction with industry will be necessary for the HIPT to develop a better understanding of the many detailed advantages and disadvantages of each candidate aircraft relative to the defined HIAPER requirements.

5.2.2 Acquisition Strategy

5.2.2.1 Program Management Strategy

The primary management objectives are two-fold:

Figure 7 summarizes the aircraft acquisition tasks and their anticipated duration.

Figure 7. Task list and Schedule to Acquire Aircraft

The selected contractor will be encouraged to establish its own Integrated Product Team (IPT), consisting of the personnel from each functional organization that will be involved in the delivery of the aircraft. The selected contractor's IPT, with HIPT membership, will work together to manage the effort defined by the contract. (The use of such working partnerships is a distinctive feature of modern commercial aircraft contracting practice.) The contract, in concert with the selected contractor's existing company processes, will be used to measure program performance and assess progress. The contractor's processes and production tracking procedures will be used to give insight into program performance and risk management. The selected contractor will be encouraged to use, to the extent practical, electronic media for all program management communications.

The IPT process will be used to review program requirements, schedule, current status, technical manuals, logistics support, and design. Weekly conference calls will be held with all IPT members, to conduct business that does not require on-site presence. Management data and formats used by the contractor will be provided to UCAR.

Configuration management will be conducted using standard commercial practices such that the design data for the modified aircraft is traceable to the final (as-built) configuration. The selected contractor will provide all applicable optional Service Bulletins (from airframe manufacturers, vendors, etc.) not automatically incorporated into the aircraft for UCAR to determine desirability for incorporation. A method of maintaining the currency of contractual specifications will also be provided. UCAR and NCAR concurrence on the detailed design of the aircraft modification will be ensured through the IPT process.

5.2.2.2 Contracting Strategy

The HIAPER contracting strategy will be in accordance with all relevant UCAR Policies and Procedures, which are in compliance with the current NSF - UCAR Cooperative Agreement and applicable Office of Management and Budget (OMB) Circulars. The UCAR Contracts Office will, when appropriate, use the acquisition streamlining initiatives outlined in the Federal Acquisition Regulation (FAR) Part 12, "Acquisition of Commercial Items." This will ensure that there is a common baseline of understanding within industry and a framework for contractual clauses and structure. FAR Part 12 provides a guideline for acquisition of commercial items through a limited number of contract clauses. Where appropriate and in compliance with UCAR Policies and Procedures, FAR clauses may be used. Unique aspects of the HIAPER program will be supported by either tailoring existing FAR clauses or by the creation of HIAPER-specific clauses to meet program requirements. Commercial terms and conditions will be used whenever appropriate. Best business practices will be accomplished by early, frequent, and open communication with industry to ensure that industry can provide a business solution that best meets the unique characteristics of the HIAPER program.

Adequate price competition is anticipated, and UCAR will ensure open competition. Initial industry analysis indicates an acceptable number of interested and qualified sources, consisting of OEMs and completion facilities that can meet HIAPER requirements.

A single Firm-Fixed-Price contract will be issued for the purchase of the aircraft and associated contractor modification, training, data, and ten years of Contractor Logistics Support (includes spare parts and maintenance). The contract will provide for the purchase and modification of the HIAPER aircraft as stated in the Statement of Work section of the contract. As part of the acquisition planning process, industry input will be sought to ensure the logistics support concept can be met. The contract will contain the appropriate contractual language to ensure contractor performance throughout the life of the contract. Vendor involvement throughout the pre-award process will be actively sought through Request for Information (RFI) letters and industry conferences. RFIs will be issued to garner industry comments and inputs on the HIAPER requirements and contracting strategy. These will help determine if all requirements can be met through commercial sources and products. The RFIs will assist UCAR in gaining a thorough understanding of commercial business practices. In addition, draft RFPs will be issued, when appropriate, to facilitate industry review and technical input to the final RFP. The draft RFP process will streamline the acquisition procedure by allowing offerors to gain an understanding of the RFP prior to its formal issuance, thus shortening the time needed for proposal preparation. As a result of early and continuous industry involvement in the acquisition process, the proposals submitted will have a much greater probability of meeting requirements and allowing UCAR to make an expeditious award, within budget and schedule.

The contract will provide limited data rights to UCAR for all special data on the basic aircraft and its modifications developed under this effort that would be useful for operations, maintenance, and future modifications to the aircraft. The contract will also provide access to basic aircraft engineering data. Data furnished to other UCAR contractors will be subject to the same limitations and will not be used for reprocurement actions.

5.2.2.3 Proposal Evaluation Plan (PEP)

The PEP will document the proposal evaluation and source selection procedures and the evaluation and decision criteria. This plan will be prepared in accordance with UCAR Policies and Procedures and will be submitted to the NOC for approval.

FAR Part 15.3, "Source Selection" will be used for guidance and a tool when the UCAR Contracts Office deems such use appropriate. FAR 15.3 prescribes policies and procedures for selection of a source in a competitive negotiated acquisition. The procedures outlined in the FAR are designed to:

For the purposes of the HIAPER acquisition, a subset of the HIPT, perhaps with additional expertise, will constitute a Proposal Evaluation Team (PET) consisting of technical evaluators, technical advisors, contracts/business representatives, and appropriate members of the NOC.

All members of the PET will be identified in the Proposal Evaluation Plan. The technical evaluators and advisors will perform the technical evaluation of the proposed HIAPER aircraft, modification, and logistics support. The contracts and business representatives will be responsible for the review and negotiation of the contract and business approach. A training session will be conducted covering the proposal evaluation and decision process prior to the release of the RFP. The Proposal Evaluation Plan will describe in detail the overall proposal evaluation process and the organization and membership of the PET, including: a summary of the acquisition strategy; a description of the evaluation factors and subfactors and their relative importance; a description of the evaluation process, methodology, and techniques to be used; and a schedule of significant milestones.

The proposal evaluation will be conducted in accordance with the approved plan. The evaluation factors, subfactors, and decision criteria will be issued in the solicitation and used as the basis for UCAR's selection of a source to be recommended to the NOC for approval.

5.2.2.4 Development of Evaluation and Decision Criteria

The HIAPER source selection will be a "Best-Value" competition involving evaluation and comparison of price and other factors. "Best-Value Procurement" is a contracting practice that reflects the recognition that it is not always wise to make decisions based on price alone, and that other evaluation criteria such as soundness of approach, technical excellence, product quality, key personnel, past performance, and other such relevant information are used to determine which offeror has tendered the "Best Value" to the contracting organization. Technical criteria may have more significance than price. The strategy for the development of evaluation and decision criteria will be the result of requirements definition, program strategy, and industry input.

The criteria will be identified as factors and subfactors. The factors and subfactors considered in evaluating proposals will be tailored to include only those factors that have an impact on the source selection decision. The factors and subfactors that apply to the HIAPER acquisition and their relative importance will be determined by UCAR as a result of the acquisition strategy discussed above. The technical evaluation and decision criteria will be supplemented by price and past performance of the offeror.

All evaluation factors, subfactors, standards, and decision criteria will be documented in the PEP and released with the RFP. In addition, the plan will document the process for analyzing past performance. The methodology to be used for price analysis, "Most Probable Total Cost" (MPTC), will also be documented in the plan to show offerors how program costs will be evaluated. The MPTC will allow UCAR to analyze the acquisition and support costs, and to factor in the operational costs that might be reasonably experienced. UCAR will use this analysis as part of its recommendation to NSF, based on price and other related factors. The approved PEP will identify the ranking of price related to other factors. Due to the unique technical nature of the HIAPER program, it is anticipated that technical capability could outweigh price.

5.2.2.5 Analysis of Most Probable Total Cost

The MPTC approach will allow UCAR to analyze acquisition and support costs, and to factor in operational costs that might be reasonably experienced. Operational costs will vary depending on the aircraft platform proposed. The MPTC can also include adjustments based on delivery performance, as described later in this section.

As an example, a simple MPTC analysis for the HIAPER program could consist of calculating a total MPTC by adding up the dollar amounts associated with the following five elements: aircraft acquisition price; logistics support price (including spare parts and maintenance); training costs; operations and deployment costs; and delivery adjustment. A slightly more sophisticated analysis could apply weighting factors to each of these elements.

As a component of the operations costs for the MPTC analysis, fuel usage will be evaluated at appropriate cruise altitudes given specific trip or mission profiles. The offeror would provide operational data for the aircraft platform being proposed. ATD will produce deployment cost estimates based on typical deployment scenarios.

A delivery adjustment could be factored into the MPTC to represent the costs associated with any potential late HIAPER delivery. This amount could be some measure of lost monthly "value" associated with the scheduled initiation of community service by HIAPER. This portion of the MPTC analysis would motivate offerors to meet the required need date and importantly, would recognize in the price analysis the lost value to UCAR and the user community for the selected contractor's inability to meet the aircraft need date.

5.2.3 Aircraft Certification and Acceptance

5.2.3.1 Federal Aviation Administration (FAA) Certification Requirements

The aircraft, as delivered from the selected contractor to UCAR, will be certified in accordance with Federal Aviation Regulations (FAvR) Part 25 (airworthiness standards), Part 34 (pollution), and Part 36 (noise). The aircraft will also carry a civil-registered "N" number and a certificate of airworthiness (FAvR Part 21). All modifications, including NCAR-provided research infrastructure, required to make the aircraft "research ready" will also be FAA-certified, as discussed below.

5.2.3.2 Operations Category

NCAR's two current aircraft, the Electra and C-130, are operated as "public aircraft." A public aircraft, as defined in the Federal Aviation Act of 1958, is "an aircraft used exclusively in the service of any government or of any political subdivision thereof including the government of any State, Territory, or possession of the United States, or the District of Columbia." The public aircraft category is useful for operating military surplus aircraft, such as the C-130, that have never carried FAA airworthiness certificates. Earlier NCAR aircraft that were purchased new from commercial sources, such as the King Air and Sabreliner, have been operated as FAA-certified aircraft.

Because of steadily increasing governmental restrictions on the operations of public aircraft, NCAR and UCAR believe it unwise to attempt to operate the HIAPER aircraft in this category. These restrictions cover several areas, including missions that may be performed, crew that may be carried, maintenance required, training and safety documentation required, and cost recovery allowed. For example, if HIAPER were operated as a public aircraft, NCAR could not accept compensation for flight time from any organization except a federal government agency (FAA Advisory Circular 00-1.1, "Government Aircraft Operations").

Non-certified aircraft must display a public aircraft document in lieu of the airworthiness certificate. Public aircraft must be registered in accordance with FAvR Part 47 and must display nationality and registration marks in accordance with FAvR Part 45. Further, all U.S.-registered aircraft engaged in international air navigation are required to have a valid certificate of airworthiness (FAA Advisory Circular 20-132, "Public Aircraft"). Further regulations on public aircraft would be imposed if additional bills currently pending in Congress (HR 1521 and HR1483) are enacted.

Accordingly, NCAR expects to operate HIAPER as an FAvR-Part 21 certified aircraft in either the standard or restricted categories, as appropriate. This will require that all aircraft modifications as well as supplemental aircraft equipment be FAA-certified through such standard mechanisms as Supplemental Type Certificates and/or Form 337s. This is the way NCAR operated the King Air and Sabreliner. If a compelling reason should develop in the future for operating HIAPER either temporarily or indefinitely as a public use aircraft, this can be authorized at that time by the Director, FAA Flight Standards Service.

The major objective of FAA aircraft certification policy is to enhance flight safety. A disadvantage of FAA-certified operation is that the cost of the necessary certifications can be significant. This additional cost can be largely offset by the aircraft's future residual resale value, which will be dramatically enhanced if FAA certifications are maintained. An example of this is the recent sale of the NSF/NCAR King Air, which would have brought a much lower price if it had not been currently FAA-certified.

5.2.3.3 Acceptance Procedure and Requirements

The HIAPER aircraft evaluation and acceptance activities will be carried out in two phases:

Phase 1 - The Aircraft Characteristics Evaluation (ACE): This will be part of the initial suitability evaluation and selection of the candidate aircraft prior to, or during, proposal evaluation and source selection. Each offeror will be required to execute an ACE questionnaire, the results of which may be reflected in final contract language. Each offeror will also be required to arrange an interview with, and elicit cooperative participation from, one of their private-sector domestic operators of like equipment. The responses from the operator to the customer portion of the ACE questionnaire will be incorporated into the final evaluation of the candidate aircraft. This operator input will also provide a benchmark for use in evaluating offeror statements, general industry information, and other operational experience concerning the candidate aircraft. As another feature of the ACE questionnaire, each offeror will be asked to provide sample data points on the performance envelope of their candidate aircraft.

The ACE activity will include a Pilot-Cockpit Evaluation, which will be designed to help UCAR and NCAR fully understand the offeror's product. Each offeror will be required to provide either an operating candidate aircraft, a fully operational simulator of the aircraft, or a reasonable engineering mock-up of the aircraft for a designated NCAR crew to evaluate. The results of this evaluation will be incorporated into the baseline understanding of the qualities and capabilities of the offeror's candidate aircraft.

Phase 2 - The Acceptance Procedure: This phase will be conducted after the contractor has completed all manufacturing and modifications, and notifies UCAR that the completed aircraft is ready for customer evaluation. The UCAR team that conducts this evaluation will use an acceptance checklist as provided in a formal acceptance plan. The aircraft must have a manufacturer's certificate of airworthiness prior to customer acceptance. The acceptance evaluation will include both ground inspection/tests and flight tests.

In the flight-test portion of the acceptance evaluation, the contractor will be required to provide a minimum of four hours of flight time for a selected NCAR crew to fly the aircraft to verify certain aspects of the completion that can only be accomplished while in flight. During this flight, the contractor will retain pilot-in-command authority (for safety and liability reasons) and will provide an instructor pilot or demonstration test pilot who has such authority. All flaws in manufacturing or materials, exceptions to specifications, or deviations from agreed-upon configuration, as revealed in the acceptance evaluation, will be resolved to UCAR's satisfaction prior to the successful completion of this step and subsequent title transfer from the contractor to NSF.

5.2.4 Community Oversight

Documents relevant to this task, including the HRD, the RFI, the RFP, and the PEP, will all be available to the community for scrutiny and comment through the HIAPER internet information system. The HAC and the NOC will oversee all major components of this task through their review and approval of these documents. In addition, status reports on the progress of this task will be presented at the first and second HIAPER community workshops and at appropriate OFAP and national meetings.

5.3 Task 3: Develop and Install NCAR-Provided Research Infrastructure

This section describes:

  • Equipment and tools, including work stations, communcations, data systems, and onboard networks, that will be provided on HIAPER.

The estimated total costs for Task 3, in 1998 dollars, are given below:

Task 3: Infrastructure FY 1999 FY 2000 FY 2001 FY 2002 FY 2003 Total
(12.50 FTE) Total 0 99,000 4,308,000 300,000 110,000 4,817,000

5.3.1 Scientist Work Stations And Intercommunications

5.3.1.1 Objectives Served by Work Station and Communications Tools

Scientific and operational staff in the field will depend upon advanced data handling and communications tools to accomplish tasks critical to successful use of the aircraft and its observing systems. These capabilities are essential for both onboard and ground-based investigators. We also anticipate that because of NCAR and UCAR's commitment to education, we have a unique opportunity to use evolving communications technologies to provide interactive access to the scientific process for students and faculty around the world.

Airborne scientists must have tools to ensure quick understanding of changing environmental conditions encountered during flight. To make the best operational and scientific decisions possible, researchers must have quick access to satellite, airborne, and ground-based data, access to model outputs and guidance, and timely interactions with other people on board and on the ground. They must have tools to ascertain the functional status of observing systems and to assist in changing flight objectives and operations to that status. They must have access to real-time data that are fully calibrated and validated through real-time quality control processes.

5.3.1.2 Functional Tools Required

With the above objectives in mind, we outline a brief model of required functionality of proposed work station and communications tools:

5.3.1.3 Technology Required

The model just described anticipates continued advances in computing, networking and satellite communication technologies. Faster, smaller processors, high-capacity disk drives and archive media, compact high-resolution flat panel displays, and faster serial network interfaces will each play an important role in the next-generation network.

Access to high bandwidth satellite data communications and satellite-based network connectivity are key to many of the concepts we consider here. Current satellite data transmission available through International Mobile Satellite Organization (Inmarsat) aviation services achieves 2.4 Kbps, which is practical only for limited data transfer needs. However, the global market for satellite-based networking now drives rapid development of satellite communication technology, and Inmarsat and other providers work toward launch of next-generation satellites that will yield major increases in bandwidth. Within three to six years, bandwidth available through Inmarsat or other providers is projected to increase by a factor of ten to 50.

The apparent dominance of Inmarsat technology for global data transfer services today portends little with regard to future capabilities. The Iridium constellation of low earth orbit satellites now coming into service, or other systems, may yield more attractive alternatives in the future. We will evaluate the capabilities and costs of all alternatives as HIAPER development proceeds.

5.3.2 Data Systems and Onboard Networks

To achieve the advances in real-time scientific tools and techniques described above, HIAPER must carry the most advanced on-board data transfer, processing and recording network available. This "central nervous system" of an observing platform is critical to nearly every aspect of data collection. The system must provide centralized synchronization, data recording and display for primary instrumentation and other systems that depend on the host aircraft for these functions, and must accommodate synchronized interface to special observing systems that employ self-contained recording systems. The network must have capacity to transmit the very high volumes of data produced by increasingly sophisticated remote sensors, optical imagers and other systems.

We plan a next-generation HIAPER data network that significantly extends the capabilities of NCAR's current airborne data system (ADS-II) which now provides advanced data handling on the NSF C-130 and Electra, and the NOAA G-IV. The ADS-II system uses a high-bandwidth network to link sensor locations throughout fuselage, pods and wingtips. Modular data system processor units using advanced digital signal processor chips can be added to the system as needed to configure it flexibly to accommodate the flow of raw data from a nearly unlimited variety of sensors. Processor units accommodate both digital and analog outputs from observing instruments of all types.

The HIAPER system will likely be modular in design similar to ADS-II, but will incorporate the most advanced technology available. Improvements in high-speed serial interfaces (e.g., 100Base-T, Universal Serial Bus or Firewire) will aid network data transmission. Advances in general purpose processors and digital signal processors will enable more real-time processing for data quality control. Advances in magnetic or optical storage media will speed post-flight data access and distribution.

5.4 Task 4: Develop and Install Instrumentation

This section discusses:

  • The challenges of instrumenting HIAPER to meet reseach needs;
  • Objectives for guiding the HIAPER instrument development task;
  • Mechanisms for community participation in identification and development of instruments;
  • Two categories of research instruments: primary (on all flights) and special (for particular research applications); and
  • The structural modifications to accommodate these instruments.

The total estimated costs for Task 4, in 1998 dollars, are given below:

Task 4: Instrumentation FY 1999 FY 2000 FY 2001 FY 2002 FY 2003 Total
(17.50 FTE) Total 0 5,700,000 534,000 4,806,000 556,000 11,596,000

Instrumenting an aircraft that operates at high altitude and high speed poses special challenges. To realize the full scientific potential of HIAPER, a substantial effort must be directed to instrumentation and particularly to exploitation of current advances in technology; instrumenting HIAPER for modern research will not amount simply to installation of existing sensors. Meeting this challenge will require an extensive collaboration among universities, NCAR and other scientific and technical groups.

Instrumentation requirements derive from the anticipated scientific needs (summarized in Section 2). Climate research requires measurements of radiative fluxes, radiation inside clouds, water vapor, convective structures and circulations, and measurements covering global scales with resolution comparable to that of climate models. Weather research needs dropsonde capability for targeted observations, measurements of precipitable water, characterization of hydrometeors and accurate characterization of air motions and thermodynamic structure. Tropospheric and stratospheric chemistry studies require measurements of the chemical species involved in photochemical cycles and deriving from terrestrial and oceanic sources. Atmospheric chemists also seek characterization of water vapor and chemically active trace gas profiles. Aerosol studies depend on measurements of particle size distributions and optical properties, both in-situ and remotely, and so require particle spectrometers, nephelometers, and active remote sensors such as backscatter lidar and instruments for measuring particle scattering phase functions. Satellite validation studies require spectral radiometers and measurement of the angular distribution of radiation as well as mapping of surface features at various wavelengths and resolutions.

For the most part, identified scientific needs match to existing instrument development or to anticipated technologies. Over the lifetime of HIAPER, however, new scientific questions and new measurement technologies will evolve. We attempt to meet present needs and leave flexibility for future research by first specifying a primary set of advanced instruments, instruments that make fundamental measurements and provide high quality data from every flight. We then discuss a second set of special research instruments, constructed to meet a set of design and infrastructural specifications, that can easily mount on HIAPER and integrate with the HIAPER power and data systems according to the scientific requirements of a specific flight. This dual mode of instrumentation, with a primary and regular set of fundamental capabilities and an interchangeable set of more specialized research capabilities, should provide reliable and flexible support to meet evolving scientific needs.

5.4.1 Challenges

Most measurements become more difficult during operation at high speeds because of compression and dynamic heating of the airflow and distortion of airflow trajectories around the aircraft. Sampling in clouds becomes especially difficult because the evaporation of cloud water can affect measurements such as temperature or humidity. Also, hydrometeor trajectories around the aircraft depart to varying degrees from airflow trajectories, leading to enhancement or depletion of hydrometeor concentrations. Heating and distortion of airflow around the aircraft may also affect remote sensing systems. High flight stresses make instrument mounting more difficult; all exterior mounting systems need to minimize interference with the aircraft's aerodynamically clean profile. The altitude range of the aircraft poses special requirements because of the correspondingly wide concentration ranges of many properties. Humidity or particle concentrations, for example, may vary by a factor of 100,000 or more during a sounding. External instruments must also operate at very low ambient pressure. These factors require careful attention when planning and developing the primary and special instruments for HIAPER.

5.4.2 Objectives

We suggest a set of specific objectives to guide HIAPER instrument developments:

5.4.3 Mechanisms for Community Participation

Developing an advanced suite of primary and special research instruments that meet community research objectives will require extensive collaboration. Collaborators include university scientists and engineers, NCAR scientists and engineers, and scientific and technical staff from national and international laboratories and/or private industry. These collaborations may take several forms:

5.4.4 Primary Instruments

This discussion of primary instruments, those that will operate routinely on every flight, focuses on likely requirements for HIAPER. A broader community discussion of primary instrumentation will occur in a community-wide workshop to be held in early 1999.

5.4.4.1 State Parameters and Other Primary Measurement Capabilities

Temperature: Some standard exposed sensors seem to work well at high speeds as long as the aircraft remains out of cloud. Adequate temperature measurements in cloud and away from the aircraft using remote-sensing techniques present greater challenges. When exposed sensors become wet, associated evaporative cooling causes an error that becomes larger with increasing airspeed, leading to a serious problem for in-cloud measurements. We anticipate assigning a high priority to the development of new in-cloud temperature capabilities.

Humidity: Providing adequate coverage over a wide range of humidities (ranging over partial pressures from above 50 mb to below 10-4 mb) presents a difficult challenge. The high airspeed of the platform introduces possible biases into some measurements, for example of dew-point or vapor density, that depend on absolute humidity, so even standard instruments will require special attention.

The primary in-situ humidity sensors currently in use are either too old for continued support, too slow for flux measurements, or incapable of making accurate measurements at low absolute humidity. Tunable Diode Laser techniques currently being tested have suitable detection limits and response time. Hybrid Lyman-alpha detectors using fluorescence also have the necessary sensitivity. Cryogenically-cooled dewpoint sensors may help achieve measurements at low humidity. Technological developments now underway should provide the basis for improved humidity measurements matched to HIAPER capabilities.

Measurements of humidity must be made in ways that either fully exclude or include the contribution for hydrometeors. Excluding condensed-phase water will require special inlets. Measuring total water content could be accomplished with complete evaporation of the sampled water, perhaps as provided by counterflow virtual impactors.

Wind and Turbulence: HIAPER should measure both mean horizontal winds and turbulent fluctuations in all three components of air velocity. A likely minimum requirement for in-situ measurements of air motion on HIAPER will be either a flush-mounted radome system or a conventional boom-mounted gust probe, the choice to be based on structural considerations and uses of the radome.

Although a high-speed aircraft provides advantages for obtaining measurements quickly over considerable distances, increased speed leads to increased dynamic errors in measuring the air velocity components by pressure differences. A laser air velocity sensor focused about 10 m ahead of the aircraft could resolve all three air-velocity components while measuring in the undisturbed air at that locale. Any HIAPER air motion system should incorporate a state-of-the-art Inertial Reference System with high-rate sampling of all three acceleration components and attitude angles. Essential improvement in long-term accuracy can be achieved through incorporation of an enhanced-accuracy GPS with three-axis capability to measure attitude angle. Accurate high-rate measurements of aircraft position, velocity and orientation are essential not only for air motion measurements but also for many of the remote sensing instruments planned for HIAPER. Higher frequency measurements of small-scale turbulent structure by hot-film sensor technology may represent another important capability for HIAPER.

Dropsondes and Other Sondes: HIAPER should have capability to deploy a variety of sondes. Current users of the NCAR GPS dropsondes on NSF, NOAA and USAF aircraft attest to the high importance of these sensors. HIAPER will need automated launching capabilities for the dropsondes and perhaps for other types of atmospheric and oceanic sondes as well.

Other Primary Measurement Capabilities: Pressure and geometric altitude are key measurements for many applications. Measurements of static pressure to a few tenths of a hPa are essential for calculating true airspeed from dynamic (pitot) pressure and for measuring pressure altitude; a radar altimeter with corresponding accuracy of a few meters should be available. A C-band weather avoidance radar and supporting data system may also represent an important HIAPER capability.

5.4.4.2 Primary Radiation Instruments

Recent trends in climate research have focused attention on the importance of measuring contributions to the global radiation budget. Uncertainty regarding how clouds influence radiation and how that influence might respond to climate change is a major obstacle to climate prediction. Similar uncertainty exists regarding the radiative forcing from anthropogenic aerosols. HIAPER should play a major role in the reduction of these uncertainties, so good measurements of radiation are essential.

The importance of these measurements, and the need for climatological characterization, argue for their routine collection. In addition to focused studies directed at cloud absorption anomalies or links between cloud radiative properties and hydrometeor type, HIAPER will also collect climatologically significant data during long transit legs and during profiling of the vertical structure of the atmosphere. With the simultaneous characterization of aerosol and hydrometeor features, these radiation measurements will provide an important data set for learning more about radiative fluxes in the atmosphere. This aircraft also provides an important opportunity to characterize actinic fluxes that determine photochemical transformations. These measurements, which must be made in-situ, will be valuable inputs to models of tropospheric chemistry.

A radiometric instrumentation suite should be capable of remotely sensing the following: up-welling and down-welling radiative fluxes in the ultraviolet, visible, and infrared portions of the electromagnetic spectrum; total and diffuse radiative fluxes; and remote measurement of surface temperature. RAF has used commercial radiometers to measure radiative fluxes for a long time. Improved measurements can now be obtained from radiometers custom built for use on aircraft. The design and deployment of this instrumentation provides a good opportunity for collaboration with university colleagues.

To acquire the climatological characteristics needed for studies of atmospheric chemistry and atmospheric radiation, a case can be made for including spectral radiometers and actinometers as standard instrumentation. Recent advances make their inclusion as routine instrumentation a possibility.

5.4.4.3 Primary Chemistry Instruments

Standard measurements to be made from HIAPER include chemical tracers of the exchange of air between the UT/LS, ozone and water vapor. Instruments to measure gases such as CO, CO2 and CH4, which can be relatively automatic and compact, should be deployed at every opportunity to construct a climatology of the exchange of air in the UT/LS. Coincident measurements of ozone and water vapor should be made to establish the background of these critical gases as correlated with the transport of air in the UT/LS.

These routine observations, along with the primary aerosol and radiation measurements, would provide a framework to interpret better the more extensive measurements of NOx and HO necessary to understand fundamental photochemical cycles of ozone and other materials in the upper troposphere. These measurements will be made by special research instruments described below.

5.4.4.4 Primary Cloud Physics and Aerosol Instruments

Cloud physicists need to measure the optical properties of hydrometeors and aerosols; total and partitioned-by-phase condensed water content; cloud condensation and ice nuclei; aerosol size distributions in and out of cloud; spectrally resolved radiative fluxes in clouds; the composition and hygroscopic properties of aerosol particles; and the chemical constituents in cloud water or ice. Aerosol physicists need to measure optical properties; chemical composition; and nucleating ability of aerosol particles. None of these measurements are now routinely available on NCAR aircraft, but all are feasible for installation on HIAPER.

Instruments are becoming available to characterize the asymmetry parameter and optical extinction coefficient of hydrometeor populations and the scattering phase function of individual hydrometeors. A newly developed single-particle mass spectrometer has revealed a surprising variety of components in aerosol particles, and a new ice nucleus counter is providing airborne measurements.

Modifications of Hydrometeor Spectrometers: Primary measurements should include the ability to characterize the complete aerosol and hydrometeor size distribution, to measure the condensed-water content of clouds and to partition this measurement between solid and liquid phases.

Particle Measurement System probes are often used to measure hydrometeor size distributions. These pose some problems for HIAPER, mostly because they currently are based on outdated technology with limited time response that compromises their use on a high-speed aircraft. It will be important to upgrade these measurement capabilities (perhaps by redesign of the electronics or by adoption of new probes), and to reduce the drag associated with these probes. There are some exciting new probes that will improve the achievable resolution, but these are in relatively early stages of deployment and need further testing and evaluation. Other groups, notably the Centre National de Recherches en Metéorologie in France, have redesigned the electronics for some of the probes; their designs should be considered for HIAPER.

Aerosol Spectrometers: The challenge here is to measure a complete aerosol size distribution while covering the wide range of concentrations that will be encountered over the altitude range of the aircraft. There are good candidate techniques and instruments, but the current status of these is not well matched to the need for routine unattended operation and compact installation. In addition, the performance of many aerosol instruments degrades at low pressure, so considerable development work is needed to provide suitable aerosol instrumentation. This work can build on the current generation of cloud nuclei counters, mobility analyzers, and optical particle counters.

Many of the instruments required to characterize aerosols must be housed within the aircraft. Historically, inlet losses have been the primary source of sampling errors for these systems. HIAPER would benefit from a community aerosol inlet and other collaborative efforts to provide improved aerosol sampling.

5.4.5 Special Instrumentation

This section provides some examples of special use instrumentation that may be suited to HIAPER. The instruments surveyed here are intended as examples of capabilities that may be possible with suitable development effort. Priorities for these instruments need to be determined by a process involving the full user community, including the workshops mentioned earlier. Ideally, instruments discussed in this section should fit the 'plug-and-play' model for specialized HIAPER research instruments.

5.4.5.1 Remote Sensors

In the extreme, remote sensing instrumentation on HIAPER might provide 3-D fields of winds, temperature, humidity, and hydrometeor type and concentration in regions near the aircraft. Scanning radiometers might provide cross-track mapping of surface emissions at several wavelengths. Future remote sensing techniques might detect a variety of chemical species.

Instruments that might contribute to these goals include:

5.4.5.2 Special Radiation Instruments

The need to resolve the spectral and angular distribution of radiative fluxes at flight level will require specialized radiation measurements on HIAPER. Instruments will be needed that measure the wavelength dependence of radiative fluxes and that scan with high angular resolution. There will also be a need for multichannel radiometers that operate in cloud and that provide full 360( scanning to document the full angular distribution of radiation in clouds. Extensive measurements of actinic flux, valid in and out of cloud, will also be needed to support studies of photochemistry.

A suite of cross-track scanning radiometers could provide mapping capabilities at visible, infrared, and microwave wavelengths. These measurements of the radiative properties of the ground or cloud below the aircraft can be used to determine vegetation types, soil moisture, sea, snow and ice characteristics, etc. Good candidate instruments have been developed and deployed on research aircraft. Important improvements in technology that could support smaller, faster and otherwise improved versions of these instruments are now available.

Scanning radiometers can also support tomographic reconstruction of atmospheric features, as has been demonstrated with microwave radiometers. For such reconstruction, uniform illumination of the feature of interest is essential, so the potential is best realized with upward-scanning radiometers.

5.4.5.3 Chemistry Instruments

HIAPER's payload should include special research instruments to measure in-situ concentrations of NOx, NOy and HOx, together with primary instruments to measure the set of trace constituents listed in Section 2. The selection and development of these and other specialized instruments will depend upon significant community involvement and provide good opportunities for collaboration with universities and other research institutions with expertise in measurement of critical chemical constituents.

A second important role for HIAPER will be to deploy instruments that measure a variety of stratospheric gases, such as a remote sensing Fourier transform spectrometer. The high altitude and long range capabilities of HIAPER are critical to successful deployment of such devices; these measurements are important additions to in-situ process studies and useful for intercomparisons with global satellite-borne observations. It will also be valuable to be able to collect air samples for laboratory detection of species that cannot be measured in flight.

5.4.6 Structural Modifications to Meet Instrumentation Needs

It is not possible to specify the full range of instruments a platform like HIAPER will need to carry over its lifetime. HIAPER should therefore have flexible configuration and infrastructure that can support unanticipated instrumentation. Airframe modifications and aircraft flight capabilities represent two major design aspects that will determine the utility of the aircraft over its projected 25-30 year lifetime. The modifications described here would support the kinds of instrumentation described in this document, and provide good flexibility for the installation of new sensors as they are developed.

HIAPER should have external ports and hardpoints that can be used for future instrumentation. It should provide a series of inlets suitable for gas phase and aerosol sampling. The upcoming community instrumentation workshop will provide an opportunity for thorough discussion of these modification options. We discuss two candidate modifications below.

A series of hardpoint windows, similar to those on the Electra, might be installed on the belly and roof of HIAPER, along the plane's centerline. These hardpoint windows could be used for mounting individual sensors that sample the external airstream, or for pass-throughs to belly and roof 'canoes', faired pods mounted to the fuselage. These belly and roof canoes could support the installation of up- and down-looking instrumentation on the aircraft, including air inlets, in-situ sensors, and remote sensors. The hardpoint windows would provide instrumentation access between the fuselage and canoe interiors. With canoes removed, the aircraft will be able to attain its original flight configuration. The canoe design should allow modular instrument installation on structures the ATD shop can design and fabricate. The height, diameter and shape of the canoes will be such that remote sensors can scan from horizon to horizon from within the canoes (with an appropriate window shielding the antenna from the airstream). HIAPER's canoe structures might match similar features planned for the NOAA G-IV, which would allow exchange of instruments between the two aircraft.

The nose of HIAPER might support a cylindrical extension of the fuselage in place of the standard radome. An alternate hemispherical radome would mount on the front of the extension. The cylindrical section could support remote sensing and in-situ sensing instruments. The concept is similar to that implemented on the NSF/NCAR King Air aircraft. It provides the ability to fly a wide variety of sensors within the cylindrical section while using the radome with a conventional weather avoidance radar.

5.4.7 Community Involvement and Oversight

Section 4.5 described extensive community involvement in planning and developing instrumentation. The majority of instrumentation efforts could well occur in the university community. Two community workshops described in Section 3.3 and 4.4.2 will play major roles in determining the instrumentation capabilities of HIAPER. An NSF peer review process and the HAC will all have important roles in the selection of instrument development efforts and teams.

5.5 Task 5: Prepare for Operations

This section presents UCAR/NCAR's plan for preparing for operations and covers:

  • Staff training;
  • Aircraft maintenance;
  • Instrument installation; and
  • The schedule for these activities.

The total estimated costs for Task 5, in 1998 dollars, are summarized below:

Task 5: Prep. for Operations FY 1999 FY 2000 FY 2001 FY 2002 FY 2003 Total
(13.25 FTE) Total 0 0 118,000 244,000 2,520,000 2,882,000

5.5.1 Staff Training

The successful contractor will provide to RAF staff initial and follow-on training for the period of time specified in the system support portions of the contract. UCAR will specify the types and levels of training needed for each person to attain full operations and maintenance capabilities. To the maximum extent possible, the formal "trained to" standards usual and customary in operations of this nature will be followed. Training levels for operations personnel will aim at formal licenses where applicable. All training will be accomplished by fully qualified commercial vendors who meet industry standards for type, level and detail of training.

5.5.2 Aircraft Maintenance Program

We anticipate a two-level maintenance program for HIAPER: flight line and minor maintenance accomplished in-house and major extensive maintenance accomplished by a support contractor. The support contractor will be the OEM contractor or a third party designated by the contractor, as specified in the successful aircraft proposal.

5.5.3 Technical Manuals

Technical manuals for all systems and functions will be prepared by the contractor to the industry standard level of detail, with tailoring as needed to meet HIAPER requirements. Follow-on technical manual support will also be required by the contract. Changes, updates, and all other usual and customary support provided to the general customer base of the contractor will be provided to UCAR. Specific technical manual issues will be worked out through a special IPT for Technical Manuals comprised of members of UCAR and CAIPT acquisition staff, NCAR operations and maintenance staff and contractor personnel.

5.5.4 Instrument Installation and Testing

All instrumentation and research infrastructure will undergo rigorous ground and airborne testing for safety and proper operation before acceptance for use on HIAPER. While laboratory testing may begin at any time during instrument development, subsequent instrument installation, ground testing on the aircraft, and airborne testing of research instrumentation and data systems and on-board networks will occur in the 24 months following acceptance of the aircraft. Testing of contractor-supplied components of aircraft research infrastructure such as power and signal wiring, and communications systems will occur at the time of acceptance.

Small test teams comprised of scientific, engineering and technician staff will be responsible for guiding and evaluating the test process and verifying receipt of adequate documentation for instruments assigned individually or in groups. For instruments developed under contract, the work of the test team will begin prior to acceptance of the instrument and will be part of the acceptance procedure. The test leader for each team will draw on NCAR, university and other resources as needed to ensure that tests and evaluations adequately cover safety, scientific performance, engineering quality and user/operator documentation.

When appropriate, preliminary ground run-ups of the aircraft will verify instrument operation using research power systems and the data system in the aircraft. A series of dedicated flight tests will use aircraft maneuvers, exposure to a wide range of flight environments, and intercomparisons with other research aircraft or ground-based sensors to evaluate instrument performance under research conditions.

Near the end of the overall HIAPER effort, scientific evaluation flights based at Jeffco will provide opportunities to test the performance of aircraft with various instruments prior to the start of routine operations. A final overall comprehensive test program will evaluate the full operational and measurement capabilities of the complete integrated HIAPER system. The results of these tests will form the basis of a recommendation to the HAC and to NSF on overall acceptance of HIAPER and its components as ready for research operations.

6. Qualifications of UCAR and NCAR

Wherein:

  • UCAR and NCAR's capacity to perform successfully as the HIAPER project integration team is presented;
  • NSF reviews of UCAR and NCAR are citied; and
  • NCAR's long history of providing researchers with aircraft support is summarized.

UCAR, under NSF sponsorship since 1960, has managed NCAR on behalf of the university community, in a unique partnership with that community that serves all parties with excellence. UCAR's mission was confirmed by the UCAR Member Representatives through the publication in 1991 of UCAR's Strategic Plan4. Subsequently an assessment of progress toward that plan5 was published. UCAR'S mission is:

The strategies identified to achieve this mission are:

Of the six goals identified by UCAR the two highest are:

UCAR and NCAR strive to represent the interests of the broad community, rather than those of any single organization or institution. This precept pervades the Corporation's and Center's activities and philosophies. NSF convened multiple review panels throughout 1994-1997 to review all NCAR divisions, NCAR as a national center and UCAR's management capabilities. The following excerpts from the May 1997 review panel report to the NSF exemplify the panel's high assessment:

UCAR submitted a proposal to NSF in September 1997 to serve as the basis for the recently renewed UCAR-NSF Cooperative Agreement6. It provides complete details regarding UCAR and NCAR community leadership, executive and management capabilities, and administrative systems.

6.1 Administrative Support Capabilities

UCAR's administrative services include contracting, risk management, accounting and financial reporting and human resources. Centralized corporate-wide activities in these areas are carried out through the UCAR Finance and Administration (F&A) group, which develops and implements policies and procedures involving all business and human resource management. These activities are monitored and overseen by the UCAR Board of Trustees as well as by NSF. Additionally, regular audits are conducted by Deloitte and Touche, as well as by the Inspector General of NSF.

The NCAR Director's Office provides administrative support in research planning and budgeting to all NCAR divisions, and each division, in turn, has skilled administrators and managers to handle business matters.

During the past 38 years, UCAR and NCAR have initiated, planned, and successfully conducted many major procurements on behalf of the community and sponsors. A few examples are:

In all of these major projects, UCAR and NCAR have successfully performed the administrative and business tasks necessary to satisfy the increasingly more complex requirements for subcontracting, acquisition, reporting, spending and record-keeping. The current administrative systems in UCAR F&A are well suited for conducting the HIAPER project, in concert with the university community and NSF.

The governing principles for UCAR acquisitions are the UCAR Contracts Policies and Procedures, which ensure compliance with the current UCAR-NSF Cooperative Agreement, other federal agency cooperative agreements, prime contracts, grants, subawards and other contractual documents used to transfer funding. Specific terms and conditions which have flow-down applicability, such as FARs, specific OMB Circulars, NASA FAR supplements and the Uniform Commercial Code, are addressed in the UCAR Contracts Policies and Procedures. The UCAR Contracts Office is charged with negotiating and administering the provisions that are included in these various funding agreements and with ensuring proper flow-down to subcontracts.

6.1.1 Authority

Authority to bind UCAR resides in the President of UCAR as delegated by the UCAR Trustees. The President may, in turn, delegate all or part of this responsibility for preparation, execution and administration of UCAR subawards and subcontracts. The President has delegated this responsibility to the Contracts Office through the Vice President for F&A. Purchase orders, subawards, or other arrangements binding UCAR are issued only through the Contracts Office, except in cases of emergency as determined by the Manager of Contracts or by policy.

6.1.2 Policy

It is the policy of UCAR to acquire all goods, services and research from outside sources using open competition, to the maximum practical extent consistent with the objectives and requirements of the NSF-UCAR Cooperative Agreement.

6.1.3 Source Selection

It is UCAR's policy to seek new qualified sources and to monitor the performance of currently qualified vendors. Surveys of vendors' facilities are conducted, when appropriate, to estimate the performance capability of potential and/or actual suppliers. A survey by questionnaire is sometimes used to gather information from potential suppliers to evaluate their financial and productive capabilities. A survey by a UCAR team through a visit to a vendor is used, when appropriate, to evaluate the vendor's performance and technical capabilities.

6.2 NCAR Capabilities in Research Aviation

NCAR's success in research aviation derives from unique expertise and from devotion to the needs of the diverse research community that we serve. We challenge ourselves to repeat and extend our high level of service with each new deployment.

6.2.1 Research Aircraft Development and Modification

NCAR has developed and operated nine research aircraft for the NSF, beginning with a pair of Beech Queen Airs in 1964. A sequence of aircraft including the DeHavilland Buffalo, North American Sabreliner, Schweitzer sailplane, and Beech King Air, matched with successive generations of NCAR research infrastructure, logged thousands of research flights around the world. Responding to need for larger payloads, greater range and greater endurance than these aircraft could provide, today's NSF/NCAR fleet consists of a Lockheed C-130 and a Lockheed Electra. Both are heavy-lift turboprops that bear extensive NCAR-developed airframe modifications and research infrastructure.

6.2.1.1 Lockheed C-130 Hercules

NSF acquired the C-130 via government surplus in FY 1993. An intense NCAR effort transformed the aircraft from a special-purpose military facility to a flexible, cutting-edge flying observatory. Now entering its fifth year in service as a research platform, the C-130 carries NCAR-developed airframe modifications and data/power-handling infrastructure that enable extensive research payloads comprised of NCAR and user-supplied instrumentation. Fuselage apertures of different shapes and sizes accommodate remote sensors looking up, down and scanning. The apertures accept optical windows or structural plates that serve as mounting locations for a variety of gas or aerosol inlets or other sensors. Large, interchangeable instrumentation pods (two at any one time) carry optical particle probes, active and passive remote sensors, and in-situ sensors under each wing. The pods are especially useful for scanning remote sensors that require wide-angle views with minimal blockage by the aircraft. Wingtip pylons each carry two canister-mounted sensors, and structures at fuselage top and bottom provide additional capacity for hemispheric radiometers and other sensors.

6.2.1.2 Lockheed L-188 Electra

In 1974 the Lockheed Electra became the first long-range, high capacity aircraft in the NSF/NCAR fleet. Since that time NCAR has developed aperture, boom, and pylon capabilities on the aircraft to within the practical limits of the airframe. In 1991 the Electra underwent its most radical modification: the replacement of its tail and empennage structure with that of a Lockheed P-3 aircraft. The greater structural strength of the P-3 tail is needed to accommodate the tail-mounted antenna/radome assembly of NCAR's ELDORA airborne Doppler radar.

6.2.1.3 Strengths in Airframe Modification

The apertures, pods, pylons, booms, instrument fairings and fuselage hard points that accommodate the extensive payloads available on the C-130 and Electra are the product of specialized expertise in structural analysis, engineering design, machining and sheet metal fabrication within NCAR in close coordination with the aircraft manufacturer. NCAR staff in aeronautical and mechanical engineering have extensive experience in solving problems posed by aerodynamic and inertial loading, vibration, aerodynamic flutter and other issues specific to aircraft. NCAR design staff have decades of experience in aviation work within NCAR and elsewhere in the industry. State-of-the-art computer-aided engineering design tools are coupled to advanced, numerically-controlled machine tools in NCAR's machine center, allowing highly efficient design and fabrication of the most complex structures and fittings. NCAR staff includes three highly skilled specialists in the fabrication and repair of sheet metal structures, essential in almost any airframe modification.

6.2.1.4 Strengths in Data System Design and Onboard Display

NCAR's expertise in computer engineering, signal processing, and software development forms a very strong foundation for the development of advanced airborne and ground-based systems for high speed networking and the processing, recording, and display of data products.

NCAR's current generation airborne data system, ADS-II, and associated software provides advanced data handling on the C-130 and Electra. The NOAA G-IV aircraft also relies on an ADS-II system built and adapted by NCAR to NOAA's specialized needs. As outlined in Section 5.3, the ADS-II system uses modular design and leading technologies. This system allows for easy integration of the diverse user supplied instrumentation that NCAR incorporates into aircraft payloads. NCAR's WINDS software system provides flexible real-time display of data.

6.2.2 Research Instrumentation Development and Support

NCAR's close collaborations with community observational scientists, strong internal scientific staff and broad strengths in engineering and fabrication yield a unique capability for the development and support of cutting-edge instruments. NCAR developed and supported systems are critical to observational studies in atmospheric chemistry, radiation, cloud/aerosol physics, dynamical meteorology and other areas. NCAR instrument systems span a breadth of technologies covering exposed sensors, active and passive remote sensing and other techniques. Early accomplishments include pioneering work in techniques for measurement of air motions from aircraft. This work subsequently resulted in development of the radome gust probe, a reliable tool that has become the standard for research aircraft. NCAR pioneered the development of dropwinsonde technology for sounding the atmosphere from aircraft, and today leads efforts to incorporate GPS technology in next generation sondes. NCAR GPS dropsonde systems presently fly on both NOAA P-3s, the NOAA G-IV, the NASA DC-8, the Canadian Atmospheric Environment Services' Convair, the German Deutsche Luft- und Raumfahrt (DLR) Falcon and the ten C-130s of the USAF Weather Reconnaissance (Hurricane Hunter) group. NCAR also developed ELDORA, a state-of-the-art, multifrequency, rapid scan airborne Doppler radar whose high resolution probing of tornadoes, severe storms, frontal structures and boundary layer features is leading to dramatic and fundamental insights into the structure of small scale circulations in the troposphere. ELDORA also represents a powerful example of ATD's design and engineering capabilities and of international collaboration in instrument development. NCAR is also well equipped to provide value-added modifications and ongoing support to observational systems developed by other groups. We refurbished the NASA developed Multichannel Cloud Radiometer (MCR) to provide new capabilities for radiation measurements by the NSF community. We will shortly complete lidar system modifications and a scanning mechanism to adapt the Scanning Aerosol Backscatter Lidar (SABL) for use in the difficult environment of a C-130 wing pod.

6.2.3 Flight Operations and Maintenance

NCAR flight crews meet or exceed the highest standards of the aviation industry. Our pilots hold Airline Transport Pilot ratings and average 20 years of experience as pilot-in-command. Pilots and flight engineers undergo frequent proficiency exercises and rigorous simulator training each year. NCAR aircraft are maintained by an experienced crew of FAA licensed mechanics working to a customized maintenance plan developed by the manufacturer to meet the unique needs of research aviation. Ongoing progressive inspection and maintenance of airframes, controls and power systems is supplemented by manufacturer prescribed major airframe inspections at four year intervals on the C-130 and at five year intervals on the Electra.

NCAR maintains proven capability for worldwide deployment, built through experience on six continents in all seasons at both populated and remote locations. Flight crews are highly experienced in all aspects of international operations. Maintenance crews are fully equipped and experienced in the completion of routine and nonroutine maintenance in the field. Logistics staff is proficient in securing the arrangements necessary to ensure proper access to ground services, maintenance support, and medical support.

6.2.4 Field Project Execution

NCAR's integrated team of scientists, flight crew, engineers, and technicians provides in-depth capability for field-project execution. Field project managers and project scientists provide scientific guidance to project design, payload development and design of research flight strategies. Engineers and technicians provide customized configurations for instrumentation and software. During flight operations, project managers and scientists maintain coordination functions, provide ongoing assessments of instrument performance, and often provide value-added scientific guidance to project investigators. Post-project functions include data quality assurance and documentation. Proficiency in all these services is proven and maintained through a continuous record of successful, complex aircraft deployments.

7. Qualifications of USAF Commercial Aircraft Integrated Product Team

The CAIPT was officially formed as an USAF organization in 1994. Current CAIPT personnel, however, have been actively involved in the procurement of many different types of FAA-certified commercial aircraft since 1978. Their combined efforts have resulted in the procurement of a total of over 640 aircraft with a contract value of over $6 billion, as shown below in Table 5.

In anticipation of increased emphasis on the use of commercial aircraft to meet future USAF mission needs, the Commercial Aircraft Acquisition Critical Process Team (CPT) was formed in May 1992 to document and improve the commercial aircraft acquisition process. The CPT included representatives from six government organizations, as well as from seven aircraft manufacturers that do a large portion of their business in the commercial sector. Most of the recommendations from the CPT work have now been incorporated as part of new, streamlined acquisition reforms.

Table 5. Commercial Aircraft Procured by CAIPT Staff Since 1978

Military Derivative Manufacturer Commercial Designation Number Procured Comments
C-12F Beech Super King Air 300 40  
C-20A and B Gulfstream G-III 10  
C-20H Gulfstream G-IV 2  
C-21A and B Lear Lear 35 84  
C-22B Boeing 727-100 4  
C-23A Shorts Sherpa 330 36  
VC-25A Boeing 747-200 2 Air Force One
C-26A and B Fairchild Merlin/Metro 235 67  
C-29A British Aerospace 125-800 Hawker 6  
C-32A Boeing 757-200 4 In progress
C-33A Boeing 747-400F 0 Cancelled at contract award
C-37A Gulfstream G-V 3 In progress;
option for 4 additional
C-38A Israeli Aircraft Astra SPX 2 Option for 2 additional
EC-18A Boeing 707-300 7  
KC-10A Douglas DC10-30CF 60  
T-1A Beech Beech Jet 400 180  
T-3A Slingsby Firefly 113  
T-6A Raytheon Pilatus 700 In progress
J-AWACS Boeing 767-200 4 In progress
AL-1A Boeing 747-400F 1 Airborne Laser (ABL);
in development

8. Estimated Costs and Budgets

We base our budget analyses on projected staffing needs, necessary materials, acquisition subcontracts, development subcontracts with universities, travel for acquisition and other tasks and equipment for aircraft infrastructure. The project extends for five years and requires a total of $66M in 1998 dollars. The major portion of this funding will be allocated to acquisition of the modified aircraft. Some details about our cost estimates are described below.

Salaries and Benefits: All FTE employees' salaries, which include costs for non-work time, are calculated at 85% before benefits and overhead are applied. The benefit rate is calculated at the FY1999 rate proposed by UCAR to NSF of 49.3%; the overhead rate is calculated as proposed at 45.7% during the project years. A chart calculating the total estimated costs in 1998 dollars and with inflation is included in Table 2 (Section 1.2). Overhead is calculated on modified total direct costs, which excludes equipment, non-NCAR participant supplement costs and subcontracts over $25,000.

Project labor costs were determined by identifying the type of personnel and the percentage of staff time needed to complete each task. The total estimated costs have been broken down by task and fiscal year. Cost categories identified by NSF (Form 1030) were used to show funding for each fiscal year during the life of the project. Table 4 (Section 4.2) summarizes our staffing needs. This table includes several FTEs for essential services that will be supported by indirect rather than project funds.

Materials and Supplies: Along with hardware and software needs, we include costs for materials and supplies for instrument design and fabrication.

Contingency Funds: Because of the magnitude of the HIAPER project and the uncertainty of schedules and out year costs, we include a modest contingency of 2.7% to meet unanticipated acquisition and development costs.

Equipment: We anticipate the need for some large equipment purchases related to airframe modifications and instrumentation development. These will include communication and network components, display systems, major maintenance equipment, and instrument and remote sensing components.

9. Conclusion

HIAPER represents an extraordinary opportunity to match new aircraft capabilities with new instrument and communications technologies in support of NSF's present and future research needs. We believe UCAR, NCAR and ATD provide the best combination of skills, experience and community involvement to bring this new capability into users' hands in a cost-effective manner. UCAR, NCAR and ATD feel pleased to propose this activity in partial fulfillment of our mission to extend, support and enhance the research capabilities of the nation's universities toward the betterment of humankind.


Biographical Sketches

Robert Serafin directs NCAR. He oversees an annual budget of approximately $91 million and a staff of approximately 800 and leads the Center's scientific, technical and support programs. NCAR's staff includes 120 Ph.D. scientists and an equivalent number of scientific visitors each year.

Serafin started his engineering career with work on the design and development of high-resolution radar systems. He joined NCAR as Manager of the Field Observing Facility in 1973 and became director of ATD in 1980. Serafin has published numerous technical and scientific papers and established the Journal of Atmospheric and Oceanic Technology.

Serafin was elected to the National Academy of Engineering in 1994. He chaired the NRC's Committee on National Weather Service Modernization. Serafin is a Fellow of the American Meteorological Society and a Senior Member of the Institute of Electrical and Electronic Engineers. He received his B.S., M.S., and Ph.D. Degrees in Electrical Engineering from Notre Dame, Northwestern University, and Illinois Institute of Technology, respectively.

David Carlson directs the Atmospheric Technology Division within the National Center for Atmospheric Research. ATD provides advanced climate and weather observing systems and associated support services to the university and NCAR research community for purposes of climate and weather studies worldwide. The ATD Director manages a staff of 125 engineers, technicians, and scientists, with an annual budget of approximately $15M. The ATD director also shares oversight of the NSF/NCAR observing facility allocation process. Carlson works with members of the scientific community to develop field project plans and to anticipate facility needs.

Carlson served on the graduate faculty in the College of Oceanography at Oregon State University. While at OSU, he authored or co-authored 25 refereed papers and chapters covering marine chemistry, small-scale ocean physics and rheology, oceanic microbiology and intertidal chemical ecology. He designed and produced a highly successful ocean surface sampling system still in use in several oceanographic laboratories, and also developed new techniques for exploring molecular scale rheology and for assaying photorepair enzymes.

Carlson joined UCAR in 1991 to lead the TOGA COARE International Project Office. He and the TCIPO staff worked with scientists from around the world to plan and implement this large air-sea interaction experiment in the tropical western Pacific Ocean. Carlson's responsibilities included: preparing and publishing experimental designs and operational plans; securing observing system resources from atmospheric and oceanographic agencies of six nations; reporting regularly to international and national agencies and science advisory groups; arranging permissions, clearances, waivers and communications systems among and within 13 nations; managing project funds and resources; and directing daily operations and an operations staff of 40 people for 125 consecutive days.

Carlson received his B.A. in Biology from Augustana College and the Ph.D. in Oceanography from the University of Maine. He served as an NRC Post Doctorate Research Associate at the Naval Research Laboratory in Washington, DC.

Jeff Reaves serves as Associate Vice President for Business Services at UCAR. He manages the following functions: Contracts and Risk Management; Information Technology; Intellectual Property and Technology Commercialization; Facilities Engineering and Space Management; Maintenance and Construction; and Telecommunications. Additionally, Reaves serves as the Vice President and Chief Operating Officer of the UCAR Foundation, and Vice President of WITI Corporation, a UCAR affiliate corporation.

Reaves began his career with NCAR in March of 1979 as a senior contracts administrator. In 1986, Reaves accepted the position of Manager of Corporate Administration for UCAR. In 1988, Reaves became director of Industry Relations for UCAR, where he assumed management responsibility for the newly formed UCAR Foundation and for UCAR's Corporate Affiliate Program.

Jim Warren is the Chief Systems Engineer for the USAF Commercial Aircraft Developmental Systems Office, which is responsible for the procurement of the customized Gulfstream V aircraft (C-37A) and the Boeing 757 aircraft (C-32A) for the Vice President, cabinet members, members of Congress and other high-ranking dignitaries of the U.S. and international governments. He is also the Chief Systems Engineer for the acquisition of the Astra SPX (C-38A) aircraft, as well as an advisor to several other high-level product teams.

Prior to his current duties, Warren was involved in ten other commercial aircraft acquisition programs, including Chief Engineer for the Air Force One (VC-25A) Program and consultant for NASA's SOFIA Program and NOAA's High-Altitude Aircraft Program. He has been a leader in the streamlining of the commercial aircraft acquisition process since 1992.

Warren is the author of "U.S. Air Force Commercial Aircraft Acquisitions" (ASC-TR-96-5001, November 1995), an important technical report that serves as the standard guide to the streamlined commercial aircraft acquisition process for military and other U.S. government organizations.

1Cooper, W.A., W.B. Johnson, J.E. Ragni, G. L. Summers, M.N. Zrubek, 1989: Scientific Justification and Development Plan for a Mid-Sized Jet Research Aircraft. NCAR Tech. Note NCAR/T/N-337+EDD, 57pp.

2Radke, L.F., and P. Spyers-Duran, 1992: Meeting Review: Third NCAR Research Aircraft Fleet Workshop. NCAR Tech Note NCAR/TN-374+PROC, 69 pp.

3These plans are consistent with the UCAR-wide approach to information management, being developed by the UCAR Information Technology Council (ITC). The ITC was appointed following the NSF reviews of UCAR and NCAR, in response to a review recommendation that UCAR examine and propose ways to take advantage of modern communications advances in support of its mission.

4 UCAR 2001: A Strategic Outlook for the University Corporation for Atmospheric Research

5 UCAR 2001: A Mid-Course Assessment in 1996

6 NCAR and UCAR at the Millennium: A vision for Science, Facilities, Service and Leadership