🚀 go-pugleaf

                                                     6.5






EOIM-3/TEMP-2A2 Evaluation of Oxygen        Determines effects of atomic oxygen degradation on 
                Interaction with Materials  1100 candidate materials.

                Two Phase Mounting          Operates a mechanically pumped two phase heat 
                Plate Experiment            acquisition; transport and rejection system in microgravity.

ERBS         Earth Radiation Budget         Collects global earth radiation budget data.
             Satellite

ESMC         Eastern Space and Missle       USAF organization headquartered at Patrick AFB, Florida.
             Center

EURECA       European Retrievable           Platform placed in orbit for six months offering
             Carrier                        conventional services to experimenters.

EUVE         Extreme Ultraviolet            Produce definitive sky map and catalog of extreme ultraviolet 
             Explorer                       portion of electromagnetic spectrum (100-1000 angstroms).

EXOSAT       ESA X-Ray Satellite            Provides continuous observations of x-ray sources.

FDE          Fluid Dynamics Experiment      A package of six experiments flown on the middeck that
                                            involve simulating the behavior of liquid propellants in
                                            low gravity.
FEA          Fluids Experiment Apparatus    Commercialization mid-deck payload.

FEE          French Echocardiograph         Obtains on-orbit cardiovascular system data.
             Equipment

FLT          Flight                        The flight sequence number for Shuttle missions.

FLTSATCOM    Fleet Communication           U.S. Navy communications satellite.
             Satellite

FPE          French Postural Experiment   Studies sensory-motor adaptations in weightlessness.

FR           Foreign Reimbursable         Undefined foreign reimbursable Hitchhiker-G type Payload.

FSC          Fleet Satellite              U.S. Navy Communications Satellite (same as FLTSATCOM).
             Communications

FSS          Flight Support System        Support systems used for revisit missions.

                                                     6.6






FTS-DTF     Flight Telerobotic Servicer-   The demonstration flight of a Telerobotic System being
            Demonstration Test Flight      developed for the Space Station to assist in attached
                                           payload assembly and maintenance, in-situ platform and
                                           satellite servicing, space station maintenance, 
                                           servicing, assembly and inspection.

GALAXY      GALAXY                         Hughes communications satellite.

GALILEO     GALILEO                        Investigates the chemical compostion and physical state
                                           of Jupiter's atmosphere and satellites.

GAS BRIDGE  Get Away Special Bridge        Structure in the payload bay that can hold up to
                                           twelve GAS canisters.

GEOSTAR     GEOSTAR                        Interactive radiodetermination satellite.

GEOTAIL     GEOTAIL                        Explore Geotail of the Earth Plasma Physics.

GLOMR       Global Low Orbit Message       Packet data relay satellite.
            Relay

GLOW        GLOW                           Atmospheric luminosities investigation.

GOES        Geostationary Operational      NOAA Weather Satellites.
            Environmental Satellite

GP          Gravity Probe                  Scientific probe to test Einstein's Theory of Relativity.

GP-B1       Gravity Probe-B1               A prototype test of the Gravity Probe-B mission to test
                                           Einstein's General Theory of Relativity.  The mission 
                                           will include on-orbit testing of precision gyroscopes 
                                           and support systems.

GP-B2      Gravity Probe-B2                Free flying payload to verify aspects of
                                           Einstein's relativity theory using sensitive,
                                           superconducting gyroscopes.

GPS        Global Positioning System       DOD navigation and positioning system satellites.

GRO        Gamma Ray Observatory           Investigate extraterrestrial gamma-ray sources.


                                                     6.7






GSO        Geosynchronous orbit

GTO        Geosynchronous Transfer
           Orbit

HC         Hughes Communications           Series of commercial communications satellites.

HCMM       Heat Capacity Mapping           Produce thermal maps for discrimination of rock
           Mission                         types, mineral resources, plant temperatures, 
                                           soil moisture, snow fields, and water runoff.

HE         High Eccentricity Orbit

HEAO       High Energy Astronomical        Satellite to study energetic radiation from space.
           Observatory

HELIO      Heliocentric            

HH-G       Hitchhiker-Goddard              A Shuttle cargo bay, payload carrier system for small
                                           experiments.

HH-M       Hitchhiker-Marshall             A Shuttle cargo bay, across-bay carrier system for 
                                           small experiments.

HILAT                                      Evaluate propagation effects of disturbed plasmas on 
                                           radar and communications systems.

HME        Handheld Microgravity           Provide for middeck experiments of limited scope in order
           Experiment                      to allow for low-cost, timely testing of concepts or
                                           procedures, or the early acquisition of data; specific
                                           objectives to be established for each flight.

HPCG       Handheld Protein Crystal        Develop techniques to produce in low-G protein crystals of
           Growth Middeck Experiment       sufficient size and quality to permit molecular analysis by
                                           diffraction techniques.

HPE        Heat Pipe Experiment            Foreign Reimbursable Hitchhiker-G payload.

HPTE       High Precision Tracking         Demonstrates ability to propagate a low power laser beam
           Experiment                      through the atmosphere.


                                                     6.8






HS-376 RET  HS-376 Retrieval              Salvage of HS-376 communication satellites launched on
                                          the tenth shuttle mission.

HST        Hubble Space Telescope         Observes the universe to gain information about its 
                                          origin, evolution and disposition of stars, galaxies, etc.

HST-R      Hubble Space Telescope-        Revisit mission to the Hubble Space Telescope to replace
           Revisit                        either science instruments orother orbital replacement
                                          units (ORU's).

IBSE       Initial Blood Storage          Evaluates changes in blood tissue during various storage
           Equipment                      conditions.

IBSS       Infrared Background            Obtains infrared measurements on rocket plumes, shortwave
           Signature Survey               infrared Earth-limb, Shuttle environment, and chemical
                                          release from payload bay while detached in proximity to
                                          the Orbiter.

ICBC       IMAX Cargo Bay Camera   

IECM       Induced Environment           A package of ten instruments designed to fly in the
           Contamination Monitor         Orbiter payload bay on a special pallet to check for
                                         contamination in and around the Orbiter.  It also has the 
                                         capability to be operated on the end of the RMS outside
                                         of the payload bay.

IEF        Isoelectric Focussing         Gather experimental data on the extent of electro-osmosis 
           Experiment                    in space.

IEH        International Extreme-UV/     Hitchhiker experiment to study ultraviolet emissions.
           Far-UV Hitchhiker

IFCE/ESA   In-Flight Contamination       A group of sensors mounted on the ESA Mast to study the
           Experiment                   contamination environment within 15 meters above the 
                                        Shuttle bay.

IG         Igloo                        Spacelab Igloo.

IMAX       IMAX, Inc. of Toronto,       Produces motion pictures of orbiter launch, inflight
           Ontario, Canada              operations and landings suitable for viewing in IMAX 
                                        theaters such as the Smithsonian.

                                                     6.9






IML       International Microgravity    Series of microgravity missions devoted to material
          Laboratory                    and life sciences studies.

INCL      Inclination                   Orbit inclination in degrees.

INMARSAT  International Maritime        PAM-DII class communications satellite to be used for 
          Satellite Organization        international maritime communications services.

INSAT     Indian Satellite              Communication and meteorological satellite for the
                                        government of India.

INTELSAT  International Tele-           International telecommunications satellite network for
          communications Satellite      the International Telecommunications Satellite
                                        Organization.

IRAS      Infrared Astronomical         All sky survey for objects that emit infrared radiation.
          Satellite

IRCFE     Infrared Communications       Demonstrates the feasibility of using diffuse infrared
          Flight Experiment             light as a carrier for STS crew communications.

IR-IE     Infra-Red Imaging             Infrared video camera used to measure temperature
          Equipment                     gradients on the orbiter surface.

IRIS      Italian Research              Italian upper stage for use on the Shuttle.
          Interim Stage

IRT       Integrated Rendezvous         A target for testing of Shuttle orbiter rendezvous
          Radar Target                  techniques and capabilities in orbit.

ISC       International Space           Commercial joint endeavor activity.
          Corporation

ISF       Industrial Space Facility     Commercially-owned, man-tended orbiting 
                                        facility for research and manufacturing
                                        activities.

ITA       Instrumentation Technology    Commercial joint endeavor activity.
          Associates


                                                  6.10






ITV       Instrumented Test Vehicle     Target for Anti Satellite.

IUS       Inertial Upper Stage          Upper stage system for Shuttle and Titan.

LAGEOS    Laser Geodynamics             Spherical satellite covered with retroreflectors which 
          Satellite                     are illuminated by ground-based lasers to determine 
                                        precise measurements of the Earth's crustal movements.  
                                        Satellite is totally passive. 

LANDSAT   Land Satellite                Earth resources monitoring satellite.

LDEF      Long Duration Exposure        Free-flying satellites providing accommodations for
          Facility                      experiments requiring long-duration exposure to the
                                        space environment.

LDSFD     Laser Docking Sensor          Demonstrates a laser system to provide accurate relative
         Flight Demonstration           spacecraft position, attitude, and rates in support of
                                        future systems development.

LEO       Low Earth Orbit

LFC       Large Format Camera           Acquire synoptic, high-resolution images of the Earth's
                                        surface.

LIFESAT   Life Sciences Satellite       Life science flights with micro-g as the primary 
                                        objective.

LITE      Lidar In-Space                Project to demonstrate the Laser Detection and Ranging 
          Technology Experiment         (Lidar) solid state system from space.

LM        Long Module                   Spacelab Crew Module.

LO        Lunar Observer                Geological, elemental, gravity, and magnetic field 
                                        mapping of moon.

MACSAT    Multi-Access Communications   DOD communications satellite.
          Satellite

MAGELLAN  Magellan                      Spacecraft designed to globally map the surface of Venus.

MAGSAT    Magnetic Field Satellite      Map the magnetic field of the earth.

                                                    6.11






MLE       Mesoscale Lightning           Record and observe the visual characteristics of large
          Experiment                    scale lightning as seen from space using onboard TV 
                                        cameras.

MLR       Monodisperse Latex            Produces monodisperse latex particles in the two to 
          Reactor                       forty micron range.

MO        Mars Observer                  Spacecraft to study Mars' surface, climate, gravitational,
                                        and magnetic fields.

MORELOS   MORELOS                       Mexican communication satellite system.

MPESS     Mission Peculiar              Experiment carrier.
          Equipment Support
          Structure

MPSE      Mexican Payload Specialist    Experiment performed by a Mexican payload specialist
          Experiment                    on the Shuttle flight which deployed the MORELOS satellite.

MS        Mission Specialist            A member of Shuttle flight crew primarily responsible for
                                        payload activity.

MSAT     Mobile Satellite               Satellite for developing advanced ground technologies and 
                                        techniques for mobile communications via satellite.

MSL      Materials Science              A payload which remains attached to the Shuttle to perform 
         Laboratory                     materials processing experiments in low-g.

N/A      Not Applicable

NATO     North Atlantic Treaty          Communication satellite for NATO.
         Organization

NOAA     National Oceanic and           Series of operational environmental satellites in polar 
         Atmospheric Administration     orbit.

NOSL     Night/Day Optical Survey       Optical survey of lightning.
         of Lightning

NOVA     NOVA                           Advanced Navy Navigation Satellite (OSCAR type).


                                                    6.12






OAST     Office of Aeronautics          Series of payloads sponsored by the Office of Aeronautics 
         and Space Technology           and Space Technology.

OAST-1   Office of Aeronautics and      A payload which remained attached to the Shuttle to demonstrate 
         Space Technology-1             a large light-weight solar array capable of being restowed in 
                                        flight.

OEX       Orbiter Experiments           Series of engineering experiments on the Shuttle.

OIM       Oxygen Interaction            Tests which obtained quantitative rates of oxygen
                                        with Materials interaction with materials used on the Orbiter and
                                        advanced payloads.

OMV       Orbital Maneuvering           A deployable retrievable vehicle to be flown on the STS 
          Vehicle                       to retrieve or insert payloads in orbits different from 
                                        the orbiter.

ORBTR     Orbiter                       The name of the Shuttle Orbiter used on a particular mission;
                                        e.g., Columbia, Challanger, Discovery or Atlantis.

ORFEUS    Orbiting and Retrievable       A German developed payload to explore the distribution and 
          Far and Extreme Ultraviolet   character of absorbing material in the solar neighborhood
          Spectrometer                  and through the galatic plane, to perform direct
                                        observations of the direct interstellor component, and to
                                        study mass motions in hot stellar chromo spheres, coronea
                                        and active separation in the high gravity atmosphere of
                                        White Dwarfs.

ORS       Orbiter Refueling System      An experiment to demonstrate the STS's ability to perform on-orbit 
                                        satellite refueling.

OSCAR     OSCAR                         U.S. Navy Navigational Satellite.

OSL       Orbiting Solar Laboratory     Will provide detailed data on our nearest star, the sun, to
                                        augment our studies of distant stars and cosmic processes.





                                                    6.13







OSS-1     Office of Space Science       Contamination monitor, microabrasion foil experiment,
                                        vehicle charging and potential experiment, Shuttle-
                                        Spacelab induced atmosphere, solar flare x-ray 
                                        polarimeter, solar ultraviolet spectral irradiance 
                                        monitor, plant growth unit, thermal canister experiment,
                                        and plasma diagnostics package.

OSTA-1    Office of Space and           Shuttle attached payload using the SIR-A radar to obtain 
          Terrestial Applications       high resolution images of earth.

OSTA-2    Office of Space and           Microgravity experiments.
          Terrestial Applications

OSTA-3    Office of Space and           Acquire photographic and radar images of the Earth's 
          Terrestrial Applications      surface.

OV 105    Orbital Vehicle 105           Replacement orbiter for NASA Shuttle fleet.

P         Pilot                         A member of the Shuttle crew whose primary responsibility
                                        is to pilot the Orbiter.

PAL       Pallet                        Spacelab Pallet.

PALAPA    Indonesian Communication      Synchronous satellite communication system for the 
          Satellite                     Republic of Indonesia.

PAM       Payload Assist Module         An upper stage system used on the Shuttle and the 
                                        Delta ELV.

PCG-II    Protein Crystal Growth        PCG activity in controlled temperature module.

PDRS/PFTA  Payload Deployment and       First object to be deployed and retrieved by the remote
           Retrieval System/Payload     manipulator system and is used to test reaction of RMS 
           Flight Test Article          joints.

PIONEER VENUS                           Remote sensing and direct measurements of Venus and 
                                        its surrounding environment.

PM-1      Polymer Microstructure        Effects of microgravity on the morphological formation
                                        of polymers as they go through a physical transaction.


                                                    6.14






PMG       Plasma Motor Generator        Measures hollow cathode current couplings to/thru 
                                        ionosphere; measures induced voltage in 200 meter wire 
                                        in low earth orbit.

PO         Planetary Observer           Spacecraft to study Martian upper atmosphere and 
                                        ionosphere.

POLAR     POLAR                         Polar Auroral Plasma Physics.

POP       Polar Orbiting Platform       U.S. platforms will orbit space station and perform
                                        remote sensing experiments.

PPE        Phase Partitioning           Study separation behavior of two phase system generated
           Experiment                   by the mixture in water of polyglucose and polyethylene
                                        glycol.

PS        Payload Specialist            A member of the Shuttle crew with primary responsibility
                                        for a particular payload or experiment.

PUR       Payload Under Review        

PVTOS     Physical Vapor Transport      Commercial joint endeavor activity with 3M.
          of Organic Solids

RADARSAT  Radar Satellite               Remote free flyer sensing satellite will monitor land, sea
                                        and ice for five years over the poles (U.S./Canadian/U.K.).

RCA       RCA American Communications,  Series of communications satellites.
          Inc, (now GE American
          Communications, Inc.)

RME       Radiation Monitoring          Measures gamma radiation levels in the Shuttle environment
          Equipment

ROSAT     Roentgen Satellite            NASA/West German cooperative satellite for studying X-Rays.

S         Scout                         Small Class Expendable Launch Vehicle.

S/C GLOW  Spacecraft Glow               An experiment to study and evaluate the effects of temperature on 
                                        the glow characteristics of materials exposed to high velocity 
                                        atomic elements

                                                    6.15






SAGE      Strategic Aerosol and         Map vertical profiles of the Ozone, aerosol, nitrogen
          Gas Experiment                Rayleigh molecular extinction around the globe.

SALT      Special (Purpose Inexpen-     DOD payload
          sive Satellite) Altimeter   
 
SAPIE/ESA  Solar Array Plasma Inter-    An experiment to study the plasma interaction effects on solar 
           action Experiment/European   arrays mounted on the ESA MAST which is extended from the Shuttle 
           Space Agency                 Bay.

SAN MARCO-DL  SAN MARCO-DL              NASA/Italian earth physics cooperative satellite

SAREX     Shuttle Amateur Radio         Space to ground voice and slow scan TV
          Experiment

SAS       Space Adaptation Syndrome     Measures vestibular function, motion sickness susceptibility
                                        and spatial orientation ability during prolonged
                                        weightlessness

SAS       Small Astronomy Satellite     Study x-ray sources within and beyond the Milky Way 
                                        galaxy.

SATCOM                                  RCA communications satellite.

SBS       Satellite Business Systems    All digital domestic communication system servicing
                                        large industry, the government, etc.

SDS       Solar Disk Sextant            Studies solar pulsations, oblateness, and size.

SE        Student Experiment            Experiments for the Shuttle Student Involvement
                                        Projects.

SEDS      Small Expendable Deployment   Demonstrates light weight tether deployer to support future 
          System                        experiments

SFH       Super Fluid Helium            Demonstrates the feasibility of on-orbit transfer of 
          On Orbit Transfer             superfluid helium using thermomechanical techniques.
          Demonstration



                                                    6.16






SFP       Space Flight Participant

SFU-RET   Space Flyer Unit-             A reusable, retrievable unmanned free flyer to be 
          Retrieval                     launched on the Japanese H-II rocket and retrieved by Shuttle.

SHARE     Space Station Heat Pipe       Demonstrates and quantifies the thermal performance 
          Advanced Radiator Element     of a high capacity, 50 foot, space constructible, heat 
                                        pipe radiator element.

SHEAL     Shuttle High Energy           Obtains images, spectra and timing data on celestial 
          Astrophysics Laboratory       x-ray sources and the spectrum at the 30 ft. X-ray background.

SIRTF     Space Infrared Telescope      Will span the infrared part of the spectrum with a thousand-
          Facility                      fold increase in sensitivity.

SKIRT     Spacecraft Kinetic Infrared   Measures the infrared emissions produced from spacecraft and 
          Test                          optical surfaces in low earth orbit

SKYNET    SKYNET                        United Kingdom military communication satellite.

S/L D2, D3  Spacelab D2, D3             Second and third in a series of German Spacelab Missions.  
                                        Objectives include microgravity research and technology 
                                        preparation for Space Station use.  Significant NASA
                                        participation planned on D2 and projected for D3.

S/L-J     Spacelab J                    Combined Japanese/NASA Spacelab mission objectives include
                                        life sciences and microgravity research and technology.

SLS       Space Life Sciences           Investigates the effects of weightlessness exposure using 
          Laboratory                    both man and animal specimens.

SMALL EXPL  Small Explorer              Payloads being designed to fly on Small Class ELV

SMR       San Marco Range

SMRM      Solar Maximum Repair          Conducts a technology demonstration of the STS capability
          Mission                       to rendezvous, service, checkout and deploy.

SOHO      Solar Heliospheric            Provides optical measurements as well as plasma field 
          Observatory                   and energetic particle observations of the sun system 
                                        for studies of the solar interior, atmosphere and solar wind.

                                                    6.17






SOOS      Stacked OSCAR on Scout        Two OSCAR satellites (U.S. Navy Navigation Satellite).

SPACEHAB  SPACEHAB                      Commercially-owned pressurized module for conducting
                                        experiments in a man-tended environment.

SPACELAB 1                              Demonstrate Spacelab's capabilities for multidisciplinary
                                        research.

SPACELAB 2                              Demonstrate Spacelab's capabilities for multidisciplinary 
                                        research and verify system performance.

SPACELAB 3                              Dedicated materials processing mission emphasizing 0-g 
                                        research.

SPACELAB D-1  Spacelab D-1              First dedicated German Spacelab mission.

SPARTAN- 1   Shuttle Pointed Autonomous    X-ray astronomy, medium energy survey mission.
             Research Tool for Austronomy

SPARTAN-02  Solar observing Spartan mission.

SPARTAN-HALLEY                          Search for molecules containing nitrogen, carbon or sulfur
                                        and observes the UV spectrum between 2100 and 3400A.

SPARTAN-T   SPARTAN-Target              Target for OMV-1 demonstration flight.

SPAS       Shuttle Pallet Satellite      Payload Carrier developed by Germany.

SPAS-01/OIA  German Shuttle Pallet      Demonstrates the utilization of the MBB platform and
             Satellite                  systems as a carrier for science experiments.

SP STA       Space Station              Series of flights to complete a Phase One Space Station.

SRAD/TPITS   Shuttle Radiator Assembly  Evaluate on-orbit thermal performance of a representative
             Demonstration/Two Phase    portion of an integrated two-phase thermal bus and on-
             Integrated Thermal System  orbit constructability of Space Station radiator elements
                                        using Remote Manipulator System and Extra Vehicular Activity 
                                        techniques.  This experiment combines experiments JSC 3B, 
                                        JSC 3C and GSFC 2C identified in the (Thermal Energy 
                                        Management Processes) Space Station flight experiment program.


                                                    6.18






SRL       Space Radar Laboratory        Series of flights to acquire radar images of the Earth's 
                                        surface.  The images will be used for making maps, interpreting 
                                        geological features, and resource studies.

SS        Sun Synchronous

SSBUV     Shuttle Solar Backscatter     Series of flights to measure ozone characteristics of 
          Ultra-Violet Instrument       the atmosphere.

SSIP      Shuttle Student Involvement
          Projects

SSS       Satellite Servicer System     Demonstrates capability to perform autonomous fluid resupply
                                        within the Shuttle bay.

STARLAB   Starlab                       DOD Spacelab experiments.

STP-SPARTAN  Space Test Program - Spartan   Deployment and retrieval of Spartan spacecraft which 
                                            carries USAF STP experiments.

STTP     Life Sciences Space            Develop and encourage interest on the part of college
         Technology Training Program    students in space biology and medicine.

SURFER    Stanford University Radio     Using a Hitchhiker-G, a satellite is ejected to study the
          Frequency Emissions Receiver  radio frequency emission environment.

SYNCOM    Hughes Geosynchronous         Provides communication services from geosynchronous orbit
          Communication Satellite       principally to the US government.

TAPS      Two Axis Pointing System 

TBD       To Be Determined

TDRS      Tracking and Data             Series of NASA tracking, data and communications 
          Relay Satellite               satellites to replace the ground based network.

TELESAT   Canadian Telecommunication    Communication satellite built for Telesat Canada to
          Satellite                     provide voice and TV coverage to trans-Canada network
                                        of Earth stations.


                                                    6.19






TELSTAR   AT & T Communications         AT&T COMSTAR replacement - provides communication 
          Satellite                     services to the continental US, Alaska, Hawaii, and
                                        Puerto Rico.

TFS       Thermal and Fluid Systems     Evaluates operational components in a zero-g environment
          Test                          features of space station's thermal and fluid systems.

TIS       Teacher in Space              Middeck locker supporting the Space Flight Participant
                                        Program's teacher in space.

TLD       Thermoluminescent             Obtains gamma ray measurements of the Shuttle environment.
          Dosimeter

TOS       Transfer Orbit Stage

TRANSIT   TRANSIT                       Navy navigation satellite.

TSS       Tethered Satellite System     System capable of deploying and retrieving satellite 
                                        attached by a wire tether from distances up to 100 KM 
                                        from the orbiter.

UARS     Upper Atmosphere               Satellite to study physical processes acting within 
         Research Satellite             and upon the stratosphere, mesosphere, and lower thermosphere.

UFO       Ultra High Frequency          U.S. Navy communications satellite.
          Follow-On

UK        United Kingdom

ULYSSES   Formerly ISPM (Inter-         Investigates the properties of the heliosphere (sun and 
          national Solar Polar          its environment).
          Mission)

USAF-01   USAF Satellite                Small ELV class spacecraft -- specifics TBD.

USML      United States                 Series of flights of a microgravity materials processing 
          Microgravity Laboratory       laboratory attached to the Shuttle.

USMP      United States Microgravity    Conduct materials processing experiments in the 
          Payload                       microgravity environment available in the Orbiter Cargo
                                        Bay while in low earth orbit.

                                                    6.20






USS       Unique Support Structures

UVLIM     Ultraviolet Limb Imaging      Establishes the earth and space extreme UV environment and
          Experiment                    observes space structure and time variation in segments of
                                        the 1100-3000 angstrom range.

WAMDII    Wide Angle Michelson          Set of instruments which study upper atmospheric 
          Doppler Imaging               winds from the Shuttle.
          Interferometer

WESTAR    Western Union Telegraph       A C-band satellite to replenish and expand the Westar
          Communication Satellite       system (Western Union domestic communication system).

WFF       Wallops Flight Facility

WIND      WIND                          Satellite to measure solar wind input to magnetosphere.

WISP    Waves in Space Plasmas          An attached payload to conduct a series of active 
                                        experiments using radio transmitters to perturb the
                                        space plasma environment.

WSMC      Western Space and Missle      A USAF organization with Headquarters at Vandenberg Air
          Center  Force Base.

XTE       X-Ray Timing Explorer         A Spacecraft to be used in Earth orbit to 
                                        investigate the physical nature of compact X-Ray 
                                        sources by studying fluctuations in X-Ray brightness 
                                        over timescales ranging from microseconds to years.  
                                        The XTE payload will be launched on the Shuttle and 
                                        changed out with the EUVE payload which will have been 
                                        previously launched on an explorer platform using a 
                                        Delta rocket.







                                                    6.21