    [Appendix]
    [Detailed Budget Estimates by Agency]
    [National Aeronautics and Space Administration]
    [From the U.S. Government Printing Office, www.gpo.gov]

    [[Page 1049]]

                  NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

                                  Federal Funds

    General and special funds:

                               Human Space Flight

        For necessary expenses, not otherwise provided for, in the conduct
    and support of human space flight research and development activities,
    including research, development, operations, and services; maintenance;
    construction of facilities including [repair, rehabilitation,]
    revitalization and modification of [real and personal property,]
    facilities, construction of new facilities and additions to existing
    facilities, facility planning and design, and acquisition or
    condemnation of real property, as authorized by law; space flight,
    spacecraft control and communications activities including operations,
    production, and services; and purchase, lease, charter, maintenance and
    operation of mission and administrative aircraft, [$5,510,900,000]
    $5,499,900,000, to remain available until September 30, [2001: Provided,
    That $40,000,000 of the amount provided in this paragraph shall be
    available to the space shuttle program only for preparations necessary
    to carry out a life and micro-gravity science mission, to be flown
    between STS-107 and December 2001] 2002. For necessary expenses of the
    International Space Station, to become available on October 1 of the
    fiscal year specified and remain available for that and the following
    fiscal year, as follows: for fiscal year 2002, $1,858,500,000; for
    fiscal year 2003, $1,452,500,000; for fiscal year 2004, $1,327,000,000;
    and for fiscal year 2005, $1,275,000,000. (Departments of Veterans
    Affairs and Housing and Urban Development, and Independent Agencies
    Appropriations Act, 2000.)

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0111-0-1-252      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Obligations by program activity:
          Direct program:

    00.01   Space station...................       2,252       2,464       2,125
    00.02   Payload and ELV support.........                                  86
    00.03   Investments and support.........                                 123
    00.04   Space shuttle...................       2,956       2,858       3,156
    00.05   Payload and utilization
              operations....................         199         261           8
    09.01 Reimbursable program..............         183         204         195
                                               ---------   ---------  ----------
    10.00   Total new obligations...........       5,590       5,787       5,693
    ----------------------------------------------------------------------------

        Budgetary resources available for obligation:
    21.40 Unobligated balance available,
            start of year...................         271         368         274
    22.00 New budget authority (gross)......       5,663       5,692       5,695
    22.10 Resources available from
            recoveries of prior year
            obligations.....................          24
                                               ---------   ---------  ----------
    23.90   Total budgetary resources
              available for obligation......       5,958       6,060       5,969
    23.95 Total new obligations.............      -5,590      -5,787      -5,693
    24.40 Unobligated balance available, end
            of year.........................         368         274         276
    ----------------------------------------------------------------------------

        New budget authority (gross), detail:
          Discretionary:

    40.00   Appropriation...................       5,480       5,511       5,500
    40.76   Reduction pursuant to P.L. 106-
              113...........................                     -23
                                               ---------   ---------  ----------
    43.00     Appropriation (total
                discretionary)..............       5,480       5,488       5,500
          Spending authority from offsetting
              collections:

    68.00   Offsetting collections (cash)...         174         204         195
    68.10   From Federal sources: Change in
              receivables and unpaid,
              unfilled orders...............           9
                                               ---------   ---------  ----------
    68.90     Spending authority from
                offsetting collections
                (total discretionary).......         183         204         195
                                               ---------   ---------  ----------
    70.00   Total new budget authority
              (gross).......................       5,663       5,692       5,695
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
          Unpaid obligations, start of year:

    72.40   Obligated balance, start of year       1,662       1,627       1,740
    72.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............          23          32          32
                                               ---------   ---------  ----------
    72.99     Total unpaid obligations,
                start of year...............       1,685       1,659       1,772
    73.10 Total new obligations.............       5,590       5,787       5,693
    73.20 Total outlays (gross).............      -5,591      -5,674      -5,655
    73.40 Adjustments in expired accounts
            (net)...........................           1
    73.45 Adjustments in unexpired accounts.         -24
          Unpaid obligations, end of year:

    74.40   Obligated balance, end of year..       1,627       1,740       1,778
    74.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............          32          32          32
                                               ---------   ---------  ----------
    74.99     Total unpaid obligations, end
                of year.....................       1,659       1,772       1,810
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.90 Outlays from new discretionary
            authority.......................       3,753       3,864       3,864
    86.93 Outlays from discretionary
            balances........................       1,838       1,810       1,791
                                               ---------   ---------  ----------
    87.00   Total outlays (gross)...........       5,591       5,674       5,655
    ----------------------------------------------------------------------------

        Offsets:
          Against gross budget authority and outlays:

            Offsetting collections (cash)
                from:
    88.40     Non-Federal sources...........         -29         -44         -40
    88.45     Offsetting governmental
                collections from the public.        -145        -160        -155
                                               ---------   ---------  ----------
    88.90       Total, offsetting
                  collections (cash)........        -174        -204        -195
          Against gross budget authority only:

    88.95   From Federal sources: Change in
              receivables and unpaid,
              unfilled orders...............          -9
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................       5,480       5,488       5,500
    90.00 Outlays...........................       5,417       5,470       5,460
    ---------------------------------------------------------------------------

                     Summary of Budget Authority and Outlays

                            (in millions of dollars)

                                         1999 actual  2000 est.   2001 est.
    Enacted/requested:
      Budget Authority..................       5,480       5,488       5,500
      Outlays...........................       5,417       5,470       5,460
    Supplemental proposal:
      Budget Authority..................                     -20
      Outlays...........................                     -13          -6
                                        ------------------------------------
    Total:
      Budget Authority..................       5,480       5,468       5,500
      Outlays...........................       5,417       5,457       5,454
                                        ====================================

        This appropriation provides funding for human space flight
    activities, including development and operations of the Space Station,
    the Space Station research program, and operation of the Space Shuttle.
    This includes development of contingency capabilities for the Space
    Station, high priority investments to improve the safety of the Space
    Shuttle, and required construction projects in direct support of Space
    Station and Space Shuttle programs.

    Performance Objectives

        Space station.--The International Space Station (ISS) is an
    international laboratory in low Earth orbit on which American, Russian,
    Canadian, European, and Japanese astronauts will conduct unique
    scientific and technological investigations in a microgravity
    environment. The goal of the Station is to support activities requiring
    the unique attributes of humans in space and establish a permanent human
    presence in Earth orbit. The proposed budget provides multi-year funding
    through an advance appropriation for the continued development of the
    vehicle and its research components and for current operations, assembly
    and utilization of the station. With the first launches successfully
    completed, the budget includes funding to keep subsequent assembly
    missions on schedule for completion in 2004-2005 and continue work to

    [[Page 1050]]

    wards a long-term solution to the safe return of the full complement of
    station crewmembers in the event of an emergency.

        In FY 1999, successful launches of the first two components of the
    Station--the FGB control module and the first node--were completed in
    November and December respectively, and the elements were assembled in
    orbit and activated. A third flight delivering supplies to support the
    first crews was successfully performed in May 1999. Flight hardware
    elements for the next six U.S. assembly launches--the Z1 and S0 trusses,
    the control moment gyros, the first photo-voltaic array and battery
    sets, initial thermal radiators, communication equipment, the U.S.
    Laboratory, the mobile servicing system and the Multi-Purpose Logistics
    Carrier--were delivered to the launch site, and the first phases of
    multi-element integrated testing (MEIT) were completed. Crew training,
    payload processing, hardware element processing, and mission operations
    were supported. In 2000, fabrication of flight hardware, qualification
    testing, assembly, integration and mission operations will all continue.
    Difficulties with completion of U.S. MEIT testing, coupled with delays
    to the Russian Service Module, caused by recent failures of the Proton
    launch system, have delayed planned assembly and expedition flights. The
    Service Module will be launched in mid- to late-2000, and assembly and
    expedition flights will follow. The Russian launch of a Soyuz vehicle
    will enable permanent occupation of the station with rotating crews of
    three. In 2001 plans are to launch seven U.S. missions to station,
    including the lab module. Phase 2 of the station assembly will be
    completed with the launch of the airlock, and preparations will continue
    for the start of Phase 3 and the first shuttle mission dedicated to
    research utilization in late 2001/early 2002.

        As part of the FY 1999 operating plan, Russian Program Assurance
    (RPA) was re-established within the Space Station budget line. The RPA
    funding provides contingency activities to address ISS program
    requirements resulting from delays or shortfalls on the part of Russia
    in meeting its commitments to the ISS program. The first step in the
    contingency plan is to protect against a potential further delay in the
    Russian Service Module (SM) and its capabilities. The ISS program is
    purchasing, from the U.S. Naval Research Laboratory (NRL), an interim
    control module (ICM) to provide backup attitude control and reboost
    functions for the ISS. Additionally, the Shuttle fleet is being
    configured for reaction control system (RCS) interconnectivity
    modifications to enable greater Shuttle reboost capability to the ISS. A
    permanent U.S. propulsion capability is being developed for
    implementation in the 2002 timeframe. This includes a propulsion module,
    carriers, and activities to support propulsion logistics. An agreement
    negotiated with the Russians in 1999 will provide needed hardware and
    services to the U.S., including services to provide additional crew
    return capability when the station attains the ability to support a
    permanent crew of six.

        Phase I development of a crew return vehicle (CRV), to provide the
    U.S. capability to return up to seven crew members, is initiated in
    2000. Design and operational technologies tested and demonstrated in
    Phase I will reduce CRV development risk. The X-38, including the space
    test flight in 2002, is being transitioned to merge with the ISS CRV
    funding in 2000 because of the overlap of CRV and X-38 technology
    developments. Pending a final decision on CRV development, which will be
    part of broader future launch decisions, Phase 2 development funding
    will be included in the Aero-Space Technology budget estimates beginning
    in FY 2002.

        Payload and Expendable Launch Vehicle (ELV) support.--Activities
    funded by the payload processing budget support the required technical
    expertise and facilities to perform the payload buildup, test and
    checkout, integration, servicing, transportation and installation in the
    launch vehicle. In FY 1999, launch and landing payload support
    activities were provided for four Space Shuttle missions, including the
    first American segment of the ISS, and payload processing support
    activities and facilities for six manifested major payloads. In FY 2000,
    launch and landing payload support activities will be provided for six
    Space Shuttle missions including the Hubble Space Telescope (HST-03A)
    launch, the Shuttle Radar Topography Mission (SRTM) launch, and three
    assembly flights for the ISS. In FY 2001, launch and landing payload
    support activities will be provided for nine Space Shuttle missions,
    including seven ISS assembly and utilization flights. During this
    period, five pallets will be used in Space Shuttle missions, including
    the fourth HST servicing mission and three of the ISS assembly flights.
    In FY 2000 and 2001, over 20 major and secondary payloads will be
    supported, including major hardware for ISS assembly.

        The ELV Mission Support budget provides funds for acquiring
    requisite launch services to meet all NASA requirements and for
    technical insight of commercially provided launch services. Advanced
    mission design/analysis and leading edge integration services are
    provided for the full range of NASA missions under consideration for
    launch on ELVs. During FY 1999, 10 ELV launches and 1 secondary ELV
    mission were successfully launched. Support for 13 missions, including
    Tracking and Data Relay Satellite-H (TDRS-H), Terra and Geostationary
    Operational Environmental Satellite-L (GOES-L), and four planetary
    missions are planned for launch in FY 2000, and integration and
    technical management of 28 payloads are planned for launch in FY 2000
    and FY 2001. Support for 11 missions and 1 secondary payload is planned
    for FY 2001.

        Investments and support.--Beginning in FY 2001, the Human
    Exploration and Development of Space (HEDS) Commercialization and
    Technology Initiative will include human space exploration and
    development activities emphasizing highly innovative technologies,
    advances in science, and enabling synergistic commercial space
    development efforts.

        A new project activity will begin in FY 2001 to ensure NASA's rocket
    propulsion test capabilities are properly managed and maintained in
    world class condition. The project will significantly enhance our
    ability to properly manage NASA's rocket testing activities and
    infrastructure across all four participating NASA centers.

        Engineering and technical base (ETB) activity will continue to
    support the institutional capability in the operation of space flight
    laboratories, technical facilities, and testbeds; to conduct independent
    safety, and reliability assessments; and to stimulate science and
    technical competence in the United States.

        Space shuttle.--The Space Shuttle is a partially reusable space
    vehicle that provides several unique capabilities to the United States
    space program. These include retrieving payloads from orbit for reuse,
    servicing and repairing satellites in space, safely transporting humans
    to and from space, launching ISS components and providing an assembly
    platform in space, and operating and returning space laboratories. In FY
    1999, the Space Shuttle launched four flights successfully including the
    first ISS assembly mission, one resupply flight to the ISS, one
    microgravity research mission which included the return to space of
    Senator John Glenn, and the successful deployment of the Chandra--
    Advanced X-Ray Astrophysics Facility (AXAF).

        The six flights manifested in FY 2000 include the emergency HST
    Servicing Mission 3A which will replace failing gyros on the HST and the
    Shuttle Radar Topography Mission (SRTM), a joint DOD/NASA payload to
    study the earth. The Space Shuttle will also visit the ISS four more
    times, for both assembly and maintenance. Finally, the first crew will

    [[Page 1051]]

    begin the permanent occupation and presence aboard the ISS in FY 2000.

        Nine flights are planned during FY 2001, including seven ISS
    assembly and servicing missions. In addition, a dedicated microgravity
    research flight and another HST Servicing Mission (3B) will be flown.

        The 2002 budget estimate for this account is $5.5 billion, including
    advance appropriations.

                   Object Classification (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0111-0-1-252      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

          Direct obligations:

    22.0    Transportation of things........           4           4           4
    23.3    Communications, utilities, and
              miscellaneous charges.........          55          57          56
    24.0    Printing and reproduction.......           2           2           2
    25.1    Advisory and assistance services           5           5           5
    25.2    Other services..................         132         136         134
    25.3    Purchases of goods and services
              from Government accounts......         125         129         127
    25.4    Operation and maintenance of
              facilities....................       1,389       1,429       1,412
    25.5    Research and development
              contracts.....................       3,220       3,333       3,274
    25.7    Operation and maintenance of
              equipment.....................          43          44          44
    26.0    Supplies and materials..........         148         152         151
    31.0    Equipment.......................          95          98          97
    32.0    Land and structures.............         146         150         148
    41.0    Grants, subsidies, and
              contributions.................          43          44          44
                                               ---------   ---------  ----------
    99.0      Subtotal, direct obligations..       5,407       5,583       5,498
    99.0  Reimbursable obligations..........         183         204         195
                                               ---------   ---------  ----------
    99.9    Total new obligations...........       5,590       5,787       5,693
    ---------------------------------------------------------------------------

                       Science, Aeronautics and Technology

        For necessary expenses, not otherwise provided for, in the conduct
    and support of science, aeronautics and technology research and
    development activities, including research, development, operations, and
    services; maintenance; construction of facilities including [repair,
    rehabilitation] revitalization, and modification of [real and personal
    property] facilities, construction of new facilities and additions to
    existing facilities, facility planning and design, and acquisition or
    condemnation of real property, as authorized by law; space flight,
    spacecraft control and communications activities including operations,
    production, and services; and purchase, lease, charter, maintenance and
    operation of mission and administrative aircraft, [$5,606,700,000]
    $5,929,400,000, to remain available until September 30, [2001] 2002.
    (Departments of Veterans Affairs and Housing and Urban Development, and
    Independent Agencies Appropriations Act, 2000.)

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0110-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Obligations by program activity:
          Direct program:

    00.01   Space science...................       2,211       2,224       2,389
    00.02   Life and microgravity science...         246         294         301
    00.03   Earth science...................       1,478       1,427       1,408
    00.04   Aero-space technology...........       1,342       1,093       1,190
    00.05   Space operations................                                 503
    00.06   Academic programs...............         146         152         102
    00.07   Mission communication services..         375         394          20
    09.01 Reimbursable program..............         574         606         548
                                               ---------   ---------  ----------
    10.00   Total new obligations...........       6,372       6,190       6,461
    ----------------------------------------------------------------------------

        Budgetary resources available for obligation:
    21.40 Unobligated balance available,
            start of year...................         401         281         278
    22.00 New budget authority (gross)......       6,228       6,187       6,477
    22.10 Resources available from
            recoveries of prior year
            obligations.....................          25
                                               ---------   ---------  ----------
    23.90   Total budgetary resources
              available for obligation......       6,654       6,468       6,755
    23.95 Total new obligations.............      -6,372      -6,190      -6,461
    23.98 Unobligated balance expiring or
            withdrawn.......................          -1
    24.40 Unobligated balance available, end
            of year.........................         281         278         294
    ----------------------------------------------------------------------------

        New budget authority (gross), detail:
          Discretionary:

    40.00   Appropriation...................       5,654       5,607       5,929
    40.76   Reduction pursuant to P.L. 106-
              113...........................                     -26
                                               ---------   ---------  ----------
    43.00     Appropriation (total
                discretionary)..............       5,654       5,581       5,929
          Spending authority from offsetting
              collections:

    68.00   Offsetting collections (cash)...         542         606         548
    68.10   From Federal sources: Change in
              receivables and unpaid,
              unfilled orders...............          32
                                               ---------   ---------  ----------
    68.90     Spending authority from
                offsetting collections
                (total discretionary).......         574         606         548
                                               ---------   ---------  ----------
    70.00   Total new budget authority
              (gross).......................       6,228       6,187       6,477
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
          Unpaid obligations, start of year:

    72.40   Obligated balance, start of year       2,997       2,977       3,195
    72.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............         318         350         350
                                               ---------   ---------  ----------
    72.99     Total unpaid obligations,
                start of year...............       3,315       3,327       3,545
    73.10 Total new obligations.............       6,372       6,190       6,461
    73.20 Total outlays (gross).............      -6,327      -5,972      -6,183
    73.40 Adjustments in expired accounts
            (net)...........................          -9
    73.45 Adjustments in unexpired accounts.         -25
          Unpaid obligations, end of year:

    74.40   Obligated balance, end of year..       2,977       3,195       3,473
    74.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............         350         350         350
                                               ---------   ---------  ----------
    74.99     Total unpaid obligations, end
                of year.....................       3,327       3,545       3,823
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.90 Outlays from new discretionary
            authority.......................       3,209       3,123       3,222
    86.93 Outlays from discretionary
            balances........................       3,118       2,849       2,962
                                               ---------   ---------  ----------
    87.00   Total outlays (gross)...........       6,327       5,972       6,183
    ----------------------------------------------------------------------------

        Offsets:
          Against gross budget authority and outlays:

            Offsetting collections (cash)
                from:
    88.40     Non-Federal sources...........         -24         -42         -37
    88.45     Offsetting governmental
                collections from the public.        -518        -564        -511
                                               ---------   ---------  ----------
    88.90       Total, offsetting
                  collections (cash)........        -542        -606        -548
          Against gross budget authority only:

    88.95   From Federal sources: Change in
              receivables and unpaid,
              unfilled orders...............         -32
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................       5,654       5,581       5,929
    90.00 Outlays...........................       5,785       5,366       5,635
    ---------------------------------------------------------------------------

        This appropriation provides for the research and development
    activities of the National Aeronautics and Space Administration. Funds
    are included for the construction, maintenance, and operation of
    programmatic facilities. Space science, earth science, life and
    microgravity science, and aero-space technology programs are included in
    the 21st Century Research Fund.

    Performance Objectives

        Space science.--The Space Science program seeks to answer
    fundamental questions concerning: the galaxy and the universe; the
    connection between the Sun, Earth and heliosphere; the origin and
    evolution of planetary systems; and the origin and distribution of life
    in the universe. The Space Science program is comprised of a base
    program of research and development activities, including research and
    flight mission activities, and major space-based facilities.

        In 1999, the Space Science program produced many notable scientific
    accomplishments. The Hubble Space Telescope fulfilled one of its most
    important objectives in May 1999, when the Hubble Space Telescope Key
    Project Team announced the results of their studies, which yielded an
    estimate of the Hubble constant to within 10% accuracy. The Hubble
    constant indicates the rate at which the universe is expanding

    [[Page 1052]]

    from the primordial ``Big Bang'' and is one of the most important
    numbers in cosmology because it is needed to estimate the age and size
    of the universe. Combining the Hubble constant measurement with
    estimates of the density of the universe, the team estimated that the
    universe is approximately 12 billion years old. The Chandra X-ray
    Observatory (CXO), the third of the four ``great observatories,'' was
    successfully launched and activated. As soon as science operations
    began, images showing astonishing detail of X-ray sources were obtained.
    With its unprecedented capabilities in energy coverage, spatial
    resolution, spectral resolution and sensitivity, CXO has just begun to
    investigate some of the most important topics in space science,
    including the age and size of the universe, dark matter, and X-ray
    background radiation. Other scientific discoveries related to the
    structure and evolution of the universe include the detection of
    ``middleweight'' black holes that are 100 to 10,000 times as massive as
    the Sun but occupy less space that the Moon, and the first-ever optical
    image of a gamma ray burst. Gamma ray bursts are the most powerful
    explosions in the universe, and for a very short period produce more
    energy than the rest of the universe combined. Also in 1999, several
    teams of researchers supported by NASA discovered many new planets
    orbiting nearby stars, including evidence of the first known planet
    orbiting a pair of stars. Within our own solar system, the Mars Global
    Surveyor (MGS) generated the first global three-dimensional view of
    Mars. These images revealed an impact basin deep enough to swallow Mount
    Everest, as well as pathways for water flow. Scientists using MGS'
    magnetometer discovered surprising evidence of past movement of the
    Martian crust, further evidence that ancient Mars was a more dynamic,
    Earth-like planet than it is today. A dramatic time-lapse movie by the
    Hubble Space Telescope showed, for the first time, seasonal changes on
    Uranus. The Galileo spacecraft produced new images showing volcanic
    activity on Jupiter's moon Io, similar to that which occurred on Earth
    eons ago. Analysis of data from the Lunar Prospector spacecraft
    confirmed that the Moon has a small core, supporting the theory that the
    bulk of the Moon was ripped away from the Earth when an object the size
    of Mars collided with the Earth. In the field of solar science, NASA
    sponsored scientists using the Japanese Yokoh spacecraft discovered that
    an S-shaped structure often appears on the Sun in advance of a coronal
    mass ejection (CME), a violent eruption that is as powerful as billions
    of nuclear explosions. The Solar and Heliospheric Observatory (SOHO)
    spacecraft discovered the source of high-speed solar wind, a stream of
    electrified gas that affects the Earth's space environment.

         To capitalize on these enormous successes during the past year, the
    NASA budget request for FY 2001 once again highlights Space Science. The
    President's request includes an enhanced Solar System Exploration
    program to establish a sustained presence at multiple locations on and
    around Mars and other potential research targets. Using outposts of
    numerous, networked spacecraft, NASA will greatly enhance the science
    return and overall success of future missions. Eventually, such outposts
    will bring continuous access to live data and video so that researchers
    and the public can explore and experience other worlds first-hand. Space
    Science continues to focus on the Origins program and fundamental
    questions regarding the creation of the universe and planetary systems
    and the possibility of life on places other than planet Earth. Planning
    and technology development continues for the deployment of powerful
    telescopes to detect Earth-like planets beyond our solar system, for the
    launch of a mission to directly observe subsurface oceans on Europa, and
    for future missions to seek evidence of past or present life on Mars.
    The Administration's request also includes a ``Living With a Star''
    Initiative to develop better solar weather forecasting capabilities and
    to better protect high-tech infrastructure from dangerous solar
    phenomena. The Space Science program is responsible for agency-wide core
    technology development, and funding is provided in this program to
    enhance and enable future missions through the administration's
    information technology (IT) initiative and other high-leverage
    technologies. These technologies will increase the return of the Space
    Science program and other NASA programs many fold through revolutionary
    capabilities in the areas of networking, intelligent systems,
    nanotechnology, communications, lightweight structures, miniaturization,
    mobility, and propulsion for robotic spacecraft and rovers.

        Development activities continue on the Relativity (Gravity Probe-B)
    mission, which is now scheduled for launch in 2001. The Space Infrared
    Telescope Facility (SIRTF) initiated development in April 1998, with
    launch planned for December 2001. Development activities on the
    Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics (TIMED)
    mission continued in 1999, with launch planned in 2000. Development
    activities on the Stratospheric Observatory for Infrared Astronomy
    (SOFIA) continue. The upgraded Hubble Space Telescope (HST) is providing
    new insights into our universe. Funding for HST continues to support
    operations, as well as preparation for servicing mission 3B in 2001 and
    servicing mission 4 in 2003.

        In Explorer missions, development activities continue for the
    Microwave Anisotropy Probe (MAP) and Imager for Magnetosphere-to-Aurora
    Global Exploration (IMAGE). MAP will be launched in November 2000, IMAGE
    in February 2000. Two new MIDEX missions were selected in 1999: Full-sky
    Astrometric Mapping Explorer (FAME) scheduled for launch in 2004, and
    Swift, a multi-wavelength observatory for gamma-ray burst astronomy, to
    be launched in 2003. Three Small (SMEX) missions continued development
    in FY 1999: the High Energy Spectroscopic Imager (HESSI) is to launch in
    2000; the Galaxy Evolution Explorer (GALEX) will launch in 2001; and the
    Two Wide-Angle Neutral Atom Spectrometers (TWINS) has been selected as a
    mission of opportunity, to be launched in 2002 and 2004. These missions
    emphasize reduced mission costs and accelerated launch schedules.

        The Mars Global Surveyor entered Mars orbit in September 1997, the
    Mars Climate Orbiter was launched in December 1998 and the Mars Polar
    Lander was launched in January 1999. Unfortunately, the Orbiter was lost
    while attempting to enter Mars orbit in September 1999, and the Lander
    was lost during entry, descent and landing in December 1999. Funds are
    requested for the development of future Mars missions to establish a
    sustained presence at Mars that will increase the science return and
    overall success of the Mars program. A review to be accomplished in 2000
    will provide the plan for future launches.

        In the Discovery program, the fourth mission, Stardust, was launched
    on schedule in February 1999, and is operating normally during its
    cruise to comet Wild-2, with the encounter scheduled for 2004. Two
    Discovery missions selected in 1997 are proceeding on schedule: the
    Comet Nucleus Tour (CONTOUR) will begin development in CY 2000 and will
    be launched in 2002; the Genesis solar wind sample return mission has
    begun development and will be launched in 2001. Two new missions were
    selected for implementation during 1999: The MErcury Surface, Space
    ENvironment, GEochemistry and Ranging (MESSENGER) mission to orbit
    Mercury; and the Deep Impact mission to fly by and fire an impactor into
    a comet. Both MESSENGER and Deep Impact are planned for launch in 2004.
    The President's request supports a new class of Discovery micromissions
    that will also be undertaken in 2001 to complement solar system explo

    [[Page 1053]]

    ration efforts with more frequent and varied research opportunities.

        The Flight Validation program is providing flight demonstrations of
    critical new technologies which will reduce the mass and cost of future
    science and spacecraft subsystems, while maintaining or improving
    mission capabilities. The Deep Space-1 mission was launched in October
    1998, and has validated its technologies and completed its primary
    mission, and is now in an extended mission. The Deep Space-2 mission
    which was launched with the Mars Polar Lander in January 1999, and was
    lost, along with the Lander, during entry, descent and landing on Mars
    in December 1999. The Space Technology 4 mission was terminated during
    1999 due to the need to fund higher priority programs within the Space
    Science Enterprise. Also in 1999, NASA selected the Nanosat
    Constellation Trailblazer as the Space Technology-5 Flight Validation
    mission. This mission will feature three very small satellites (each
    about the size of a large birthday cake), that will fly in formation and
    test eight technologies in the harsh space environment near the boundary
    of Earth's protective magnetic field. The Flight Validation program has
    been restructured to enhance openness and competition as well as to
    increase the number of opportunities for technologies to be flight-
    validated. Funding for the restructured program has been increased.

        Life and microgravity science.--This program uses the microgravity
    environment of space to conduct basic and applied research to understand
    the effect of gravity on living systems and to conduct research in the
    areas of fluid physics, combustion science, fundamental physics,
    materials science and biotechnology. In FY 1999, the program flew one
    science mission (STS-95) on a Spacehab carrier with ISS precursor
    science experiments. STS-95 included commercially sponsored research as
    well as research on the effects of aging conducted in collaboration with
    the National Institutes of Health's National Institute on Aging. FY 1999
    has also seen the beginning of ISS assembly. In FY 2000, the Russian
    Service Module will be launched, enabling permanent human presence
    aboard the ISS. In FY 2001, the U.S. laboratory module for the ISS will
    be launched, which will enable initial life and microgravity hardware
    and experiments to be established aboard the ISS. This will begin a new
    era of research. In FY 2001, the Administration introduces a
    Bioastronautics Initiative to accelerate research and develop
    countermeasures that will improve the health and safety of astronauts
    aboard the International Space Station. Devices and countermeasures
    developed through this initiative may also have many health benefits on
    Earth. As assembly of the ISS continues to advance, ISS Crew Health Care
    System (CHECS) components will be utilized to provide on-orbit medical,
    environmental, and countermeasure capabilities for all ISS crew members.
    In early FY 2001, prior to full research capabilities aboard the ISS,
    the program will fly a dedicated Space Shuttle research mission which
    will extend previous Space Shuttle research results and help the program
    as well as the community prepare for increasing research operations on
    the ISS.

        Earth science.--The purpose of NASA's Earth Science Enterprise (ESE)
    is to understand the total Earth system and the effects of natural and
    human-induced changes on the global environment. ESE is pioneering the
    new interdisciplinary field of research called Earth system science,
    which recognizes that the Earth's land surface, oceans, atmosphere, ice
    sheets and biota are both dynamic and highly interactive. Earth system
    science is an area of research with the potential for immense benefit to
    the nation, yielding new knowledge and tools for weather forecasting,
    agriculture, urban and land use planning, and other areas of economic
    and environmental importance. In concert with other agencies and the
    global research community, ESE is providing the scientific foundation
    needed for the complex policy choices that lie ahead on the road to
    sustainable development. ESE has established three broad goals to
    fulfill its purpose: (1) expand scientific knowledge of the Earth system
    using NASA's unique capabilities from the vantage points of space,
    aircraft and in situ platforms; (2) disseminate information about the
    Earth system; and, (3) enable productive use of Earth science and
    technology in the public and private sectors.

        FY 1999 was a year of substantial scientific accomplishment in our
    understanding of the major elements that comprise the Earth system. Over
    the oceans, ESE had several accomplishments. ESE reduced the uncertainty
    in global rainfall over the tropics by one half, helping improve
    predictions for short-term weather and availability of fresh water
    globally; produced near-daily ocean color maps that help us understand
    the role of oceans in removing carbon dioxide from the atmosphere;
    documented the waxing and waning of El Nino, enabling seasonal climate
    prediction; and resumed global measurement of winds at the ocean surface
    to improve short-term weather prediction and tracking of major
    hurricanes and tropical storms globally. Over the ice caps, researchers
    determined the thinning and thickening rates for the Greenland ice
    sheet; provided the first detailed radar mosaic for Antarctica; and
    provided the daily observations of the Polar Regions from space.

        Over the land, ESE produced the first satellite-derived assessments
    of global forest cover, began refreshing the global archive of 30-meter
    land cover data, and conducted an international field experiment in the
    Amazonia to help understand the role of vegetation on Earth in removing
    carbon dioxide from the atmosphere. In the solid Earth, ESE and the
    United States Geological Survey (USGS) measured surface displacement,
    which is a precursor to earthquakes. In the atmosphere, ESE continued to
    measure concentrations of both ozone and ozone-depleting substances and
    assess the recovery of upper ozone correlation and implemented a 17-year
    data record of aerosols and cloud properties toward predicting annual to
    decadal climate variations.

        The Earth Observing System (EOS), the centerpiece of Earth Science,
    is a program of multiple spacecraft, supporting technology and
    interdisciplinary science investigations to provide a long-term data set
    of key parameters needed to understand global climate change. The first
    EOS satellite launches began in 1999 with the launches of Landsat-7,
    Terra (formerly AM-1), and QuikSCAT. EOS PM-1 and Chemistry are on
    schedule to launch in 2000 and 2002 respectively. Preceding the EOS are
    a number of individual satellite and Shuttle-based missions which are
    helping to reveal basic processes.

        Complementing EOS, under the Earth Probes Program, will be a series
    of small, rapid development Earth System Science Pathfinder (ESSP)
    missions to study emerging science questions and to use innovative
    measurement techniques in support of EOS. The first two ESSP missions,
    Vegetation Canopy Lidar (VCL) and Gravity Recovery and Climate
    Experiment (GRACE), are scheduled for launch in 2000 and 2001,
    respectively. The second pair of ESSP missions, the Pathfinder
    Instruments for Cloud and Aerosol Spaceborne Observations--Climatologie
    Etendue des Nuages et des Aerosols (PICASSO-CENA) mission, and Cloudsat,
    will be launched together in 2003.

        Data from Earth Science missions, both current and future, will be
    captured, processed into useful information, and broadly distributed by
    the EOS Data Information System (EOSDIS). EOSDIS will ensure that data
    from these diverse missions remain available in active archives for use
    by current and future scientists. These data are expected to find uses
    well beyond the Earth Science research community. Therefore, ESE is
    engaging in a variety of public/private partnerships to extend the
    utility of Earth science data to environmental decision-makers, resource
    managers, commercial

    [[Page 1054]]

    firms, social scientists and the general academic community, educators,
    state and local governments and others.

         The ESE research and analysis program is essential to the discovery
    of new concepts and to the design of future missions. ESE research is
    coordinated through the U.S. Global Change Research Program (USGCRP),
    the Committee on the Environment and Natural Resources (CENR) and its
    Subcommittee on Global Change Research, and the various boards and
    committees at the National Academy of Sciences.

        Aero-space technology.--The mission of this Enterprise is to pioneer
    the identification, development, verification, transfer, application,
    and commercialization of high-payoff aerospace technologies. Through its
    research and technology accomplishments, Aero-space technology promotes
    economic growth and national security through a safe, efficient national
    aviation system and affordable, reliable space transportation. To meet
    this challenge, the Enterprise has established three pillar goals.
    Within these three pillar goals, a set of ten objectives, each with its
    own roadmap, has been defined to address current and future National
    needs. The technologies associated with these objectives are pre-
    competitive, long-term, high-risk research endeavors with high-payoff in
    terms of market growth, safety, low acquisition cost, consumer
    affordability and a cleaner environment. The goals of this Enterprise
    directly support National policy in Aero-Space, documented in the 1999
    National R&D Plan for Aviation Safety, Security, Efficiency, and
    Environmental Compatibility and the 1994 National Space Transportation
    Policy.

        The first pillar, Global Civil Aviation, addresses the fundamental,
    systemic issues in the aviation system to ensure continued growth and
    development appropriate to the needs of the national and global
    economies. These systemic issues--safety, capacity, environmental
    compatibility, and affordability--cut across markets including large
    subsonic civil transports, air cargo, commuter and general aviation, and
    rotorcraft. The second pillar, Revolutionary Technology Leaps, will
    revolutionize air travel and the way in which aircraft are designed,
    built, and operated, and addresses the challenges in small aircraft,
    short-haul transportation; supersonic, transoceanic transportation;
    design tools, and experimental planes. The third pillar, Access to
    Space, will enable greater commercial potential of space and the
    expansion of space research and exploration by significantly reducing
    the cost of space transportation systems while improving reliability,
    operability, responsiveness, and safety.

        A major restructuring and replanning of the Aero-Space Enterprise's
    base R&T program was accomplished during 1999 to integrate the
    Enterprise's existing space transportation and aeronautics base R&T
    development programs into a single entity. There were several benefits
    that accrued from this effort. First, the restructuring better aligned
    the required technology development efforts with our core competencies
    and brought the expertise resident in the Aeronautics Research Centers
    to bear on the technological challenges associated with space
    transportation. Second, the integration of space and aeronautics
    development needs resulted in a synergistic technology development plan
    that better utilized our resources, eliminated overlaps, and allowed
    dual use, between the space transportation and aeronautics users, to be
    planned up front rather than relying on serendipitous events.

        The President's request for NASA increases investments in technology
    development activities that will address the challenges (safety,
    environmental impact, capacity, and space transportation costs) that
    face the aero-space community.

        The Administration's request supports the development of Smart Air
    Transport System (SATS) technologies that could enable a revolution in
    accessibility and mobility in America. The product of the SATS (Phase I)
    Program will demonstrate the technological potential for transportation-
    driven economic development throughout the nation.

        The Administration's request also supports a Quiet Airplane
    Technology program that will build upon the highly successful noise
    reduction efforts that were begun in the Aero-Space Technology (AST)
    enterprise and maintain progress toward meeting the enterprise's noise
    reduction goal. The achievement of these goals will lead to an air
    transportation system that contains objectionable aircraft noise within
    airport boundaries.

        By the end of the decade, NASA will conduct a competitive launch
    services procurement to support the launch requirements of human
    spaceflight operations--the 2nd Generation RLV Focused Program. The
    objectives will be to dramatically improve safety while significantly
    reducing the cost of such launch services, and to eliminate the current
    need for the Government to own and operate the full system. The
    President's request includes new funding through the Space Launch
    Initiative to support this competition and fulfills a 1994 National
    Space Transportation Policy guideline calling for government and private
    sector decisions by 2000 on development of an operational, next-
    generation reusable launch system.

        As part of NASA's response to the national goal of reducing aircraft
    accidents by a factor of 5 by 2001, NASA increased its safety base R&T
    efforts in order to provide a foundation for a focused safety program
    beginning in FY 2000. In 1999, the base R&T programs matured these
    required safety related technologies to the point where they were
    successfully transferred to the focused Aviation Safety Program (AvSP)
    which begins in FY 2000. These technologies will provide the foundation
    for focused safety development efforts in the future. They also will
    result in some near term achievements. For example, in FY 1999, the
    causes of controlled flight into terrain (responsible for 30% of fatal
    accidents) were identified and 13 contracts issued via a NASA research
    announcement (NRA) to develop and demonstrate approaches for fully
    operational and certifiable synthetic vision and health management
    systems. Also in FY 1999, the preparations for flight evaluation of a
    crew-centered synthetic vision display were completed and a study
    initiated to understand the applicability of synthetic vision to General
    Aviation (GA) type aircraft was begun. In FY 2000, the AvSP program will
    produce an icing training program for GA and commuter pilots, complete a
    flight evaluation of an initial national capability for digital data
    link and graphical display of weather information, and demonstrate a
    concept for the integration of air traffic control runway incursion
    information onto aircraft flight deck displays. In FY 2001, the AvSP
    will complete a laboratory demonstration of a fuel system modification
    to reduce flammability, define the architecture for an integrated
    onboard health management system, and down-select synthetic vision
    concepts suitable for retrofit in commercial, business, and general
    aviation aircraft. The base R&T will continue to develop the
    technologies that will contribute to the FY 2007 goal. For example, in
    FY 2001, NASA will downselect ground-based remote sensor technologies
    for a prototype ground-system to sense icing conditions and continue
    work on a related computer.

        NASA also continued its efforts to reduce the environmental impact
    associated with aviation systems. In FY 1999, in partnership with
    industry, a demonstration in an engine test rig of a low emission
    combustor that produced a 50% reduction in oxides of nitrogen
    (NOX) emissions was successfully demonstrated. The Ultra
    Efficient Engine Technology (UEET) program will carry this effort
    forward and demonstrate a system that achieves significant reductions in
    NOX and carbon dioxide (COX) emissions in FY 2001.
    The UEET is a new focused program that begins in FY 2000 and is planned
    and designed

    [[Page 1055]]

    to develop high-payoff, high-risk technologies to enable the next
    breakthroughs in propulsion systems to spawn a new generation of high
    performance, operationally efficient and economical, reliable and
    environmentally compatible U.S. aircraft.

        Similarly with noise, in FY 1999, NASA validated an Aircraft Noise
    Impact model and demonstrated that improved high-lift systems in
    combination with advanced operational procedures have the potential to
    reduce community impact by the equivalent of 2-4 db source noise
    reduction. In 2000, NASA will validate the technologies required to
    reduce community noise impact by up to 10 dB relative to 1992
    technology.

        In 1999, the Aviation System Capacity program conducted field
    evaluation of an initial demonstration of Aircraft Vortex Spacing System
    (AVOSS) technologies with transport of vortices and class-wise spacing
    features that have the potential to reduce approach spacing standards.
    In FY 2000, NASA will demonstrate all technologies in a realistic
    Terminal Area environment achieving a 12-15% increase in single runway
    throughput and proving the ability to space aircraft closer than 3,400
    feet on parallel runways while meeting all Federal Aviation
    Administration (FAA) safety criteria. In FY 2001, NASA will demonstrate
    transition airspace decision support tools for: (1) Air Traffic Control
    (ATC)/airline operations center and ATC/cockpit information exchange,
    and (2) conflict resolution.

        Building on its world record setting performances, the Environmental
    Research Aircraft and Sensor technology (ERAST) project in FY 1999
    demonstrated a multistage turbocharged RPA to 60,000 feet for an 8 hour
    duration. The Centurion solar-powered airplane, a vehicle with a
    wingspan greater than 200 ft., completed initial low altitude evaluation
    under battery power. The Centurion solar-powered RPA was modified to a
    wingspan configuration of greater than 245 ft., named Helios and will
    continue flight testing in FY 2000. This configuration will be more
    suitable for extreme endurance as well as short flights to the 100,000
    ft. altitude. In FY01, the Flight Research program will demonstrate a
    solar powered RPA at 100,000 ft and complete development of a
    heavyweight energy storage system under the ERAST project. Both
    achievements will demonstrate technologies that will provide atmospheric
    satellites for commercial use, disaster relief efforts such as
    communication relays and real time sensing, and increase the Nation's
    capability to make scientific sampling high in the atmosphere.

        Also in FY 2000, NASA initiated a new project entitled Revolutionary
    Concepts (REVCON) to accelerate the exploration of high-risk,
    breakthrough technologies in order to enable revolutionary departures
    from traditional approaches to air vehicle design. At the end of FY
    1999, three concepts were accepted for inclusion in the REVCON program.
    Flights of these vehicles will begin in FY 2001 or 2002. Also in FY
    2001, NASA will issue the first NRA under REVCON to select the next set
    of REVCON concepts.

        Low-cost space transportation remains the key enabler for a more
    aggressive civil space program. NASA's Integrated Space Transportation
    Planning activities have identified a strategy based upon competition,
    safety, industry leadership and a comprehensive systems approach to NASA
    requirements. Funding supports aggressive technical risk reduction and
    advanced development for multiple reusable launch vehicle concepts.
    Identification and preliminary development of NASA unique systems and
    near-term pursuit of alternative access for key space station needs are
    also both critical elements of the Integrated Space Transportation Plan
    (ISTP). All of these efforts combined will move NASA closer to a full
    and open Reusable Launch Vehicle (RLV) competition in the 2005 timeframe
    to meet NASA's human space flight needs by the end of the decade.

        Under ISTP, the 2nd Generation RLV Focused Program continues to
    develop, apply and demonstrate new technologies that significantly
    advance the ability of the launch vehicle industry to initiate
    commercially viable reusable launch systems.

        The X-33 and X-34 have completed several major hardware fabrication
    and test milestones. However, technical difficulties and program
    replanning have delayed the flight testing of these advanced technology
    demonstrators. The X-34 is now expected to fly in 2000. The X-33 flight
    schedule is under review, following the failure of the composite liquid
    hydrogen tanks during testing. The X-37 complements the X-33 and X-34
    vehicles by investigating the orbit-to-Earth and orbital operations
    regimes of the flight spectrum, and will begin flight tests in 2002.

        The Commercial Technology Program's focus in FY 1999 was continued
    investment of 10-20 percent of the NASA R&D budget in commercial
    partnerships with industry. Based on experience to date, these
    commercial partnerships are expected to increase the return on the
    government's R&D investment, allowing NASA to do more with limited
    funds, and strengthening the international competitiveness of key
    industry sectors. In FY 2000 and 2001, the program will continue to
    emphasize increasing commercial partnerships with industry and continue
    to refine and expand a technology and partnership database.

        Space operations.--The primary goal of space operations is to
    provide highly reliable, cost-effective space operations services in
    support of NASA's science and aeronautics programs. In addition, support
    is provided to interagency, international, and commercial space-faring
    enterprises on a reimbursable basis. The Space Communications Mission
    and Data Services program is composed of Operations, Mission and Data
    Service Upgrades, Tracking and Data Relay Satellite Replenishment, and
    Technology Projects, as well as spectrum management and data standards
    coordination. Services are provided to a large number of NASA Missions
    including planetary, and interplanetary missions; human space flight
    missions; near-earth and earth orbiting missions; and sub-orbital and
    aeronautical flight tests. A Consolidated Space Operations (CSOC) was
    successfully implemented by the Space Operations Management Office at
    Johnson Space Center and Lockheed Martin Space Operations Company. The
    CSOC provides end-to-end mission and data services to both NASA and non-
    NASA customers. A total of nine contracts were consolidated at
    inception, and four more have been consolidated in FY 2000 to date, with
    two additional contracts to be consolidated in FY 2001. Management
    responsibility for all Wide Area Network data distribution services for
    all human space flight, earth orbiting and deep space missions and NASA
    administrative communications was outsourced by CSOC in FY 2000.
    Development of the TDRS Replenishment Spacecraft is ongoing, with the
    first satellite scheduled for launch in FY 2000.

        Academic programs.--The goal of this program is to promote
    excellence in America's education system through enhancing and expanding
    scientific and technological competence. NASA's education programs span
    the elementary through graduate levels and are directed at both students
    and faculty. The goal of the Minority University Research Program is to
    expand opportunities for talented students from underrepresented groups
    who are pursuing degrees in science and engineering and to strengthen
    the research capabilities of minority universities and colleges. The
    range of activities conducted under this program will continue to
    capture the interest of all students in science and technology, develop
    talented students at the undergraduate and graduate levels, provide
    research opportunities for students and faculty members at NASA centers,
    and strengthen and enhance the research capabilities of the Nation's
    colleges and universities.

    [[Page 1056]]

        The 2002 budget estimates for this account is $5.9 billion.

                   Object Classification (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0110-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

          Direct obligations:

    22.0    Transportation of things........           5           5           5
    23.3    Communications, utilities, and
              miscellaneous charges.........          54          52          55
    24.0    Printing and reproduction.......           5           5           5
    25.1    Advisory and assistance services         109         105         111
    25.2    Other services..................         772         743         787
    25.3    Purchases of goods and services
              from Government accounts......         223         215         227
    25.4    Operation and maintenance of
              facilities....................         264         254         269
    25.5    Research and development
              contracts.....................       3,132       3,016       3,194
    25.7    Operation and maintenance of
              equipment.....................          82          79          84
    26.0    Supplies and materials..........         210         202         214
    31.0    Equipment.......................         101          97         103
    32.0    Land and structures.............          24          23          24
    41.0    Grants, subsidies, and
              contributions.................         817         788         834
                                               ---------   ---------  ----------
    99.0      Subtotal, direct obligations..       5,798       5,584       5,912
    99.0  Reimbursable obligations..........         574         606         549
                                               ---------   ---------  ----------
    99.9    Total new obligations...........       6,372       6,190       6,461
    ---------------------------------------------------------------------------

                                 Mission Support

        For necessary expenses, not otherwise provided for, in carrying out
    mission support for human space flight programs and science,
    aeronautical, and technology programs, including research operations and
    support; [space communications activities including operations,
    production and services;] maintenance; construction of facilities
    including [repair, rehabilitation,] revitalization and modification of
    facilities, [minor] construction of new facilities and additions to
    existing facilities, facility planning and design, environmental
    compliance and restoration, and acquisition or condemnation of real
    property, as authorized by law; program management; personnel and
    related costs, including uniforms or allowances therefor, as authorized
    by 5 U.S.C. 5901-5902; travel expenses; purchase, lease, charter,
    maintenance, and operation of mission and administrative aircraft; not
    to exceed [$35,000] $40,000 for official reception and representation
    expenses; and purchase (not to exceed 33 for replacement only) and hire
    of passenger motor vehicles, [$2,515,100,000] $2,584,000,000 to remain
    available until September 30, [2001] 2002. (Departments of Veterans
    Affairs and Housing and Urban Development, and Independent Agencies
    Appropriations Act, 2000.)

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0112-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Obligations by program activity:
          Direct program:

    00.01   Safety, mission assurance,
              engineering, and advanced
              concepts......................          39          43          47
    00.02   Research and program management.       2,110       2,202       2,292
    00.03   Construction of facilities......         173         193         233
    00.04   Space communication services....         184          91           5
                                               ---------   ---------  ----------
    01.00   Total direct program............       2,506       2,529       2,577
    09.01 Reimbursable program..............          97         127         132
                                               ---------   ---------  ----------
    10.00   Total new obligations...........       2,603       2,656       2,709
    ----------------------------------------------------------------------------

        Budgetary resources available for obligation:
    21.40 Unobligated balance available,
            start of year...................          85          86          69
    22.00 New budget authority (gross)......       2,597       2,639       2,716
    22.10 Resources available from
            recoveries of prior year
            obligations.....................           7
                                               ---------   ---------  ----------
    23.90   Total budgetary resources
              available for obligation......       2,689       2,725       2,785
    23.95 Total new obligations.............      -2,603      -2,656      -2,709
    24.40 Unobligated balance available, end
            of year.........................          86          69          76
    ----------------------------------------------------------------------------

        New budget authority (gross), detail:
          Discretionary:

    40.00   Appropriation...................       2,511       2,515       2,584
    40.75   Reduction pursuant to P.L. 106-
              51............................         -11
    40.76   Reduction pursuant to P.L. 106-
              113...........................                      -3
                                               ---------   ---------  ----------
    43.00     Appropriation (total
                discretionary)..............       2,500       2,512       2,584
          Spending authority from offsetting
              collections:

    68.00   Offsetting collections (cash)...         122         127         132
    68.10   From Federal sources: Change in
              receivables and unpaid,
              unfilled orders...............         -25
                                               ---------   ---------  ----------
    68.90     Spending authority from
                offsetting collections
                (total discretionary).......          97         127         132
                                               ---------   ---------  ----------
    70.00   Total new budget authority
              (gross).......................       2,597       2,639       2,716
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
          Unpaid obligations, start of year:

    72.40   Obligated balance, start of year         487         586         594
    72.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............          66          41          41
                                               ---------   ---------  ----------
    72.99     Total unpaid obligations,
                start of year...............         553         627         635
    73.10 Total new obligations.............       2,603       2,656       2,709
    73.20 Total outlays (gross).............      -2,517      -2,648      -2,685
    73.40 Adjustments in expired accounts
            (net)...........................          -5
    73.45 Adjustments in unexpired accounts.          -7
          Unpaid obligations, end of year:

    74.40   Obligated balance, end of year..         586         594         618
    74.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............          41          41          41
                                               ---------   ---------  ----------
    74.99     Total unpaid obligations, end
                of year.....................         627         635         659
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.90 Outlays from new discretionary
            authority.......................       2,011       2,134       2,197
    86.93 Outlays from discretionary
            balances........................         506         514         488
                                               ---------   ---------  ----------
    87.00   Total outlays (gross)...........       2,517       2,648       2,685
    ----------------------------------------------------------------------------

        Offsets:
          Against gross budget authority and outlays:

            Offsetting collections (cash)
                from:
    88.40     Non-Federal sources...........         -21         -14         -24
    88.45     Offsetting governmental
                collections from the public.        -101        -113        -108
                                               ---------   ---------  ----------
    88.90       Total, offsetting
                  collections (cash)........        -122        -127        -132
          Against gross budget authority only:

    88.95   From Federal sources: Change in
              receivables and unpaid,
              unfilled orders...............          25
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................       2,500       2,512       2,584
    90.00 Outlays...........................       2,395       2,521       2,553
    ---------------------------------------------------------------------------

                     Summary of Budget Authority and Outlays

                            (in millions of dollars)

                                         1999 actual  2000 est.   2001 est.
    Enacted/requested:
      Budget Authority..................       2,500       2,512       2,584
      Outlays...........................       2,395       2,521       2,553
    Supplemental proposal:
      Budget Authority..................                      20
      Outlays...........................                      16           3
                                        ------------------------------------
    Total:
      Budget Authority..................       2,500       2,532       2,584
      Outlays...........................       2,395       2,537       2,556
                                        ====================================

        This appropriation provides funding for mission support and
    includes: safety, mission assurance, engineering and advanced concepts
    activities supporting agency programs; salaries and related expenses in
    support of research in NASA field installations; design, repair,
    rehabilitation and modification of institutional facilities and
    construction of new institutional facilities; and other operations
    activities supporting conduct of agency programs.

    Performance Objectives

        Safety, mission assurance, engineering, and advanced concepts.--The
    goal of this program is to invest in the safety and success of NASA
    missions by assuring that sound and robust policies, processes, and
    tools for safety, reliability,

    [[Page 1057]]

    quality assurance, and engineering disciplines are in place and applied
    throughout NASA. The program also examines long-term technology
    requirements for NASA's strategic objectives.

        Research and program management.--This activity provides for the
    salaries, travel support, other personnel expenses of the entire NASA
    civil service workforce, and includes vital support to the physical
    plant at the Centers and at NASA Headquarters.

        Construction of facilities.--This activity provides for facility
    construction activities to preserve NASA's infrastructure; environmental
    compliance and restoration activities, design of facilities projects,
    and advanced planning related to future facilities needs. In 1999-2001,
    activities in support of construction projects to repair and modernize
    the basic infrastructure and institutional facilities at NASA centers
    will continue, as well as activities in support of environmental
    compliance and restoration requirements.

        The 2002 budget estimate for this account is $2.6 billion.

                   Object Classification (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0112-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

          Direct obligations:

            Personnel compensation:
    11.1      Full-time permanent...........       1,201       1,264       1,343
    11.3      Other than full-time permanent          28          21          25
    11.5      Other personnel compensation..          28          27          37
    11.8      Special personal services
                payments....................          11          12          14
                                               ---------   ---------  ----------
    11.9        Total personnel compensation       1,268       1,324       1,419
    12.1    Civilian personnel benefits.....         270         276         314
    13.0    Benefits for former personnel...          11          10
    21.0    Travel and transportation of
              persons.......................          48          52          53
    22.0    Transportation of things........           5           5           5
    23.1    Rental payments to GSA..........          15          14          13
    23.3    Communications, utilities, and
              miscellaneous charges.........          33          31          29
    24.0    Printing and reproduction.......           6           6           5
    25.1    Advisory and assistance services           6           6           5
    25.2    Other services..................         224         214         195
    25.3    Purchases of goods and services
              from Government accounts......          26          25          23
    25.4    Operation and maintenance of
              facilities....................         139         133         121
    25.5    Research and development
              contracts.....................         129         123         112
    25.6    Medical care....................           6           6           5
    25.7    Operation and maintenance of
              equipment.....................          90          86          78
    26.0    Supplies and materials..........          36          34          31
    31.0    Equipment.......................          46          43          40
    32.0    Land and structures.............         144         137         125
    41.0    Grants, subsidies, and
              contributions.................           4           4           4
                                               ---------   ---------  ----------
    99.0      Subtotal, direct obligations..       2,506       2,529       2,577
    99.0  Reimbursable obligations..........          97         127         132
                                               ---------   ---------  ----------
    99.9    Total new obligations...........       2,603       2,656       2,709
    ---------------------------------------------------------------------------

                                  Personnel Summary

    ----------------------------------------------------------------------------
    Identification code 80-0112-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------
        Direct:
    1001  Total compensable workyears: Full-
            time equivalent employment......      18,178      18,031      18,641
        Reimbursable:
    2001  Total compensable workyears: Full-
            time equivalent employment......         100         100         100
    ---------------------------------------------------------------------------

                            Research and Development

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0108-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        New budget authority (gross), detail:
          Spending authority from offsetting
              collections:

            Discretionary:
    68.00     Offsetting collections (cash).          10          19
    68.10     From Federal sources: Change
                in receivables and unpaid,
                unfilled orders.............         -10         -19
                                               ---------   ---------  ----------
    68.90       Spending authority from
                  offsetting collections
                  (total discretionary).....
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
          Unpaid obligations, start of year:

    72.40   Obligated balance, start of year          51          29
    72.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............          29          19
                                               ---------   ---------  ----------
    72.99     Total unpaid obligations,
                start of year...............          80          48
    73.20 Total outlays (gross).............         -28         -48
    73.40 Adjustments in expired accounts
            (net)...........................          -4
          Unpaid obligations, end of year:

    74.40   Obligated balance, end of year..          29
    74.95   From Federal sources:
              Receivables and unpaid,
              unfilled orders...............          19
                                               ---------   ---------  ----------
    74.99     Total unpaid obligations, end
                of year.....................          48
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.93 Outlays from discretionary
            balances........................          28          48
    ----------------------------------------------------------------------------

        Offsets:
          Against gross budget authority and outlays:

    88.45   Offsetting collections (cash)
              from: Offsetting governmental
              collections from the public...         -10         -19
          Against gross budget authority only:

    88.95   From Federal sources: Change in
              receivables and unpaid,
              unfilled orders...............          10          19
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................
    90.00 Outlays...........................          18          29
    ---------------------------------------------------------------------------

        Since FY 1995 NASA's Research and Development activities have been
    performed in Human Space Flight; Science, Aeronautics and Technology;
    and Mission Support. This account shows spending from balances prior to
    the account restructuring.

                  Space Flight, Control and Data Communications

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0105-0-1-252      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
    72.40 Unpaid obligations, start of year:
            Obligated balance, start of year          20          14           2
    73.20 Total outlays (gross).............          -2         -12          -2
    73.40 Adjustments in expired accounts
            (net)...........................          -4
    74.40 Unpaid obligations, end of year:
            Obligated balance, end of year..          14           2
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.93 Outlays from discretionary
            balances........................           2          12           2
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................
    90.00 Outlays...........................           2          12           2
    ---------------------------------------------------------------------------

        Since FY 1995 NASA's Space Flight, Control and Data Communications
    activities have been performed in Human Space Flight; Science,
    Aeronautics and Technology; and Mission Support. This account shows
    spending from balances prior to the account restructuring.

                           Construction of Facilities

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0107-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Obligations by program activity:
    00.01 Supporting activity...............           7          13
    00.02 Space transportation..............           5
    00.04 Aeronautical research and
            technology......................           4
                                               ---------   ---------  ----------
    10.00   Total new obligations...........          16          13
    ----------------------------------------------------------------------------

    [[Page 1058]]

        Budgetary resources available for obligation:
    21.40 Unobligated balance available,
            start of year...................          29          13
    23.95 Total new obligations.............         -16         -13
    24.40 Unobligated balance available, end
            of year.........................          13
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
    72.40 Unpaid obligations, start of year:
            Obligated balance, start of year          30          18           6
    73.10 Total new obligations.............          16          13
    73.20 Total outlays (gross).............         -27         -25          -6
    73.40 Adjustments in expired accounts
            (net)...........................          -1
    74.40 Unpaid obligations, end of year:
            Obligated balance, end of year..          18           6
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.93 Outlays from discretionary
            balances........................          27          25           6
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................
    90.00 Outlays...........................          26          25           6
    ---------------------------------------------------------------------------

        Since FY 1995 NASA's Construction of Facilities activities have been
    performed in Human Space Flight; Science, Aeronautics and Technology;
    and Mission Support. This account shows spending from balances prior to
    the account restructuring.

                   Object Classification (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0107-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------
    25.2  Other services....................           1           1
    32.0  Land and structures...............          15          12
                                               ---------   ---------  ----------
    99.9    Total new obligations...........          16          13
    ---------------------------------------------------------------------------

                         Research and Program Management

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0103-0-1-999      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
    72.40 Unpaid obligations, start of year:
            Obligated balance, start of year           1
    73.40 Adjustments in expired accounts
            (net)...........................          -1
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................
    90.00 Outlays...........................
    ---------------------------------------------------------------------------

        Since FY 1995 NASA's Research and Program Management activities have
    been performed in Mission Support. This account shows spending from
    balances prior to the account restructuring.

                           Office of Inspector General

        For necessary expenses of the Office of Inspector General in
    carrying out the Inspector General Act of 1978, as amended,
    [$20,000,000] $22,000,000. (Departments of Veterans Affairs and Housing
    and Urban Development, and Independent Agencies Appropriations Act,
    2000.)

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0109-0-1-252      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Obligations by program activity:
    10.00 Total new obligations.............          20          20          22
    ----------------------------------------------------------------------------

        Budgetary resources available for obligation:
    22.00 New budget authority (gross)......          20          20          22
    23.95 Total new obligations.............         -20         -20         -22
    ----------------------------------------------------------------------------

        New budget authority (gross), detail:
          Discretionary:

    40.00   Appropriation...................          20          20          22
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
    72.40 Unpaid obligations, start of year:
            Obligated balance, start of year           2           3           5
    73.10 Total new obligations.............          20          20          22
    73.20 Total outlays (gross).............         -19         -20         -21
    74.40 Unpaid obligations, end of year:
            Obligated balance, end of year..           3           5           5
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.90 Outlays from new discretionary
            authority.......................          18          18          19
    86.93 Outlays from discretionary
            balances........................           1           2           2
                                               ---------   ---------  ----------
    87.00   Total outlays (gross)...........          19          20          21
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................          20          20          22
    90.00 Outlays...........................          19          20          21
    ---------------------------------------------------------------------------

        The mission of the Office of Inspector General is to conduct audits
    and investigations of agency activities. The Inspector General keeps the
    Administrator informed of problems and deficiencies in agency programs
    and operations.

        The 2002 budget estimate for this account is $22 million.

                   Object Classification (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-0109-0-1-252      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------
    11.1  Personnel compensation: Full-time
            permanent.......................          15          16          17
    12.1  Civilian personnel benefits.......           3           3           3
    21.0  Travel and transportation of
            persons.........................           1           1           2
    25.2  Other services....................           1
                                               ---------   ---------  ----------
    99.9    Total new obligations...........          20          20          22
    ---------------------------------------------------------------------------

                                  Personnel Summary

    ----------------------------------------------------------------------------
    Identification code 80-0109-0-1-252      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------
    1001  Total compensable workyears: Full-
            time equivalent employment......         191         210         213
    ---------------------------------------------------------------------------

                                   Trust Funds

               Science, Space, and Technology Education Trust Fund

                  Unavailable Collections (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-8978-0-7-503      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------
        Balance, start of year:
    01.99 Balance, start of year............          18          15          15
        Receipts:
    02.01 Earnings on investments; Science,
            Space and Technology Education,
            Trust Fund......................          -2           1           1
                                               ---------   ---------  ----------
    04.00 Total: Balances and collections...          16          16          16
        Appropriation:
    05.01 Science, space, and technology
            education trust fund............          -1          -1          -1
                                               ---------   ---------  ----------
    07.99 Total balance, end of year........          15          15          15
    ---------------------------------------------------------------------------

                   Program and Financing (in millions of dollars)

    ----------------------------------------------------------------------------
    Identification code 80-8978-0-7-503      1999 actual   2000 est.   2001 est.
    ----------------------------------------------------------------------------

        Obligations by program activity:
    10.00 Total new obligations (object
            class 41.0).....................           1
    ----------------------------------------------------------------------------

        Budgetary resources available for obligation:
    22.00 New budget authority (gross)......           1           1           1
    23.95 Total new obligations.............          -1
    ----------------------------------------------------------------------------

    [[Page 1059]]

        New budget authority (gross), detail:
          Mandatory:

    60.27   Appropriation (trust fund,
              indefinite)...................           1           1           1
    ----------------------------------------------------------------------------

        Change in unpaid obligations:
    73.10 Total new obligations.............           1
    73.20 Total outlays (gross).............          -1          -1          -1
    ----------------------------------------------------------------------------

        Outlays (gross), detail:
    86.97 Outlays from new mandatory
            authority.......................           1           1           1
    ----------------------------------------------------------------------------

        Net budget authority and outlays:
    89.00 Budget authority..................           1           1           1
    90.00 Outlays...........................           1           1           1
    ----------------------------------------------------------------------------

        Memorandum (non-add) entries:
    92.01 Total investments, start of year:
            U.S. securities: Par value......          17          13          17
    92.02 Total investments, end of year:
            U.S. securities: Par value......          13          17          17
    ---------------------------------------------------------------------------

                            Administrative Provisions

        Notwithstanding the limitation on the availability of funds
    appropriated for ``Human space flight'', ``Science, aeronautics and
    technology'', or ``Mission support'' by this appropriations Act, when
    any activity has been initiated by the incurrence of obligations for
    construction of facilities as authorized by law, such amount available
    for such activity shall remain available until expended. This provision
    does not apply to the amounts appropriated in ``Mission support''
    pursuant to the authorization for [repair, rehabilitation and
    modification of facilities,] minor revitalization and construction of
    [new facilities and additions to existing] facilities, and facility
    planning and design.
        Notwithstanding the limitation on the availability of funds
    appropriated for ``Human space flight'', ``Science, aeronautics and
    technology'', or ``Mission support'' by this appropriations Act, the
    amounts appropriated for construction of facilities shall remain
    available until September 30, [2002] 2003.
        Notwithstanding the limitation on the availability of funds
    appropriated for ``Mission support'' and ``Office of Inspector
    General'', amounts made available by this Act for personnel and related
    costs and travel expenses of the National Aeronautics and Space
    Administration shall remain available until September 30, [2000] 2001
    and may be used to enter into contracts for training, investigations,
    costs associated with personnel relocation, and for other services, to
    be provided during the next fiscal year. Funds for announced prizes
    otherwise authorized shall remain available, without fiscal year
    limitation, until the prize is claimed or the offer is withdrawn.
        [Unless otherwise provided for in this Act or in the joint
    explanatory statement of the committee of conference accompanying this
    Act, no part of the funds appropriated for ``Human space flight'' may be
    used for the development of the International Space Station in excess of
    the amounts set forth in the budget estimates submitted as part of the
    budget request for fiscal year 2000.] (Departments of Veterans Affairs
    and Housing and Urban Development, and Independent Agencies
    Appropriations Act, 2000.)