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H

HCCL —  HF —  HIS —  HP —  HSB —  HUD

ACRONYM	DEFINITION	CONTRIBUTOR
8' HTT	8-Foot High Temperature Tunnel	Langley
H&S	Health and Safety	Goddard
H/W	Hardware	Langley
HA	Hour Angle	Goddard
HAA	Height Above Airport	CASI
HAB	Habitation Module Shuttle/Space Station	Goddard
HAC	Hydrogenated Amorphous Carbon	Goddard
HACU	Hispanic Association of Colleges and Universities	Goddard
HAD	Hardware Data Acquisition	Goddard
HAD	Hubble Data Archive	Goddard
HAIRS	High Accuracy Inter-satellite Ranging System	Goddard
HALIS	High Angle of Attack Inviscid Solution	Langley
HALO	High Altitude Large Optics	CASI
HALOE	Halogen Occultation Experiment	CASI
HANDS	High Altitude Nuclear Detection Studies	CASI
HAO	High Altitude Observatory - ( National Center for Atmospheric Research, Boulder, CO)	CASI
HAPEX	Hydrological-Atmospheric Pilot Experiment	Goddard
HAPS	Hydrazine Auxiliary Propulsion System	Goddard
HAR	HST Anomaly Report	Goddard
HARCO	Hyperbolic Area Coverage System (Navigation)	CASI
HARLIE	Holographic Airborne Rotating Lidar Instrument Experiment	CASI
HARP	Hubble Aberration Recovery Program	Goddard
HARP	Hybrid Automated Reliability Predictor	Langley
HARV	High Angle-of- Attack Research Vehicle	Goddard
HARV	High Alpha Research Vehicle	CASI
HAS	High Speed Arithmetic (package)	Goddard
HAS	Hyperion Sensor Assembly	Goddard
HASE	HST Airborne Support Equipment	Goddard
HASP	Hand Altitude Sounding Projectile	CASI
HASP	High Altitude Space Platform	CASI
HAT	Height Above Touchdown	CASI
HAWC	High Resolution Airborne Wideband Camera	Goddard
HAWK	Homing-All-the-Way Killer	CASI
HAZMAT	Hazardous Material	Goddard
HBCU	Historically Black Colleges and Universities and Minority Institutions	Goddard
HBCU	Historically Black Colleges and Universities	CASI
HBDA	High Background Detector Array	Goddard
HBNQ	Nitroguanidine	CASI
HBT	Hetero-Junction Bipolar Transistors	CASI
HBWR	Halden Boiling Heavy-Water Reactor	CASI
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HCCL	Half Crystal Can Latching	Goddard
HCD	Hardware Command Distribution	Goddard
HCF	Hardened Compact Fiber	CASI
HCI	Hardware Computer Interface	Goddard
HCI	Horizon Crossing Indicator	Goddard
HCI	Human-Computer Interface	CASI
HCMM	Heat Capacity Map Mission (NASA)	Langley
HCMM	Heat Capacity Mapping Mission (NASA)	CASI
HCP	Hexagonal Close Packed Structures	CASI
HD	Hard Drive	Goddard
HDC	Hybrid Driver Controller (Space Shuttle)	CASI
HDD	Head-Down Display	CASI
HDD	Human Disorientation Device	CASI
HDE	Heater Drive Electronics	Goddard
HDF	Hierarchical Data Format	Goddard
HDF	Hubble Deep Field	Goddard
HDF-EOS	Hierarchical Data Format – Earth Observing System	Goddard
HDI	High Density Interconnect	Goddard
HDIS	HST Digital Imaging System	Goddard
HDL	Handle	CASI
HDL	Hardware Description Language(s)	CASI
HDL	Harry Diamond Labs., Washington, DC	CASI
HDOS	Hughes Danbury Optical Systems	Goddard
HDQTRS	Headquarters	Langley
HDR	High Data Rates (data transmission speeds)	CASI
HDRM	Hold Down and Release Mechanism	Goddard
HDRS	High Data Rate System	Goddard
HDRS	Hold Down and Release System	Goddard
HDS	Hybrid Dynamic Simulator	CASI
HDSL	High-bit-rate Digital Subscriber Line	CASI
HDT	Harmonic Drive Technologies	Goddard
HDT	High Density Tape	Goddard
HDTV	High Definition Television	CASI
HDWE	hardware	Langley
HDX	Half Duplex Transmission (Data communication)	Langley
HE	Heat Exchanger	Goddard
HE	High Eccentricity orbit	CASI
HEA	Head-End Assembly	Goddard
HEA	Higher Education Act of 1965	Goddard
HEA	Hyperion Electronics Assembly	Goddard
HEAO	High Energy Astronomy Observation Satellite	Goddard
HEAO	High Energy Astronomical Observatory (Spacecraft)	CASI
HEASARC	High Energy Astrophysics Science Archival Research Center	Goddard
HECRE	High Energy Cosmic Ray Experiment	CASI
HED	Human Energy Expenditure	CASI
HEDS	Human Exploration and Development of Space	Goddard
HEF	High Efficiency	Goddard
HEF	High Energy Fuel	CASI
HEG	High Enthalpy wind tunnel, Goettingen	CASI
HEI	Human Exploration Initiative	CASI
HEIDI	High Energy Imaging Device	Goddard
HEIFE	Heihe basin Field Experiment	Goddard
HEIST	High Energy Isotope Spectrometer Telescope	CASI
HEL	Human Engineering Lab., Aberdeen Proving Ground, MD	CASI
HELIO	Heliocentric	CASI
HElSPEC	High Energy Imaging Spectrometer	Goddard
HEMS	High Energy Magnet Spectrometer	Goddard
HEMT	High Electron Mobility Transistor	CASI
HENRE	High Energy Neutron Reaction Experiment (AEC)	CASI
HEO	Highly Elliptical Orbiters	Goddard
HEO	High Earth Orbit	CASI
HEO	Highly Elliptical Orbit	CASI
HEPA	High Efficiency Particulate Air	Goddard
HEPAD	High Energy Proton and Alpha Detector	CASI
HERF	High Energy Rate Forming of Powdered metals (Forging)	CASI
HERO	Hazards of Electromagnetic Radiation to Ordinance	CASI
HERO	High-Energy Replicated Optics	CASI
HERS	High Energy Range Spectrometer (GIOTTO)	CASI
HESI	High Energy Solar Imager	Goddard
HESP	High Energy Solar Physics	CASI
HESSI	High Energy Solar Spectroscopic lmager	Goddard
HET	Health/Education Telecommunications (Experiment)	CASI
HETE	High Energy Transient Experiment	CASI
HETE	High Energy Transient Explorer	CASI
HETG	(Chandra’s) High Energy Transmission Grating	CASI
HEUS	High Energy Upper Stage (Engine)	CASI
HEW	Half Energy Width	CASI
HEW	Department of Health, Education and Welfare	CASI
HEX	Hexadecimal	Langley
HEXAGONE	High Energy X-ray and Gamma-ray Observatory for Nuclear Emissions (University of California-Berkeley)	Goddard
HEXTE	High Energy X-ray Timing Experiment	Goddard
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HF	High Frequency	CASI
HFA	Hot Flow Anomalies	CASI
HFE	Heat Flow Experiment	CASI
HFE	Human Factors Engineering	CASI
HFMS	High Fidelity Mechanical Simulator	Goddard
HFMS	High Frequency Microwave Sounder	Langley
HFRM	High Focal Ratio Mode	Goddard
HFS	Human Factors Society	Langley
HFSS	High Frequency Structure Simulator	Goddard
HFSS	High-Frequency Sounder System	CASI
HGA	High Gain Antenna	Langley
HGA	High-Gain Antenna	CASI
HGAS	High Gain Antenna System	Goddard
HGBU	High Gyro Bias Updates	Goddard
HH	Herbig-Haro	Goddard
HH	Hitchhiker	Goddard
HH	Horizontal, Horizontal Polarization	Goddard
HH objects	Herbig-Haro objects	CASI
HHC	Higher Harmonic Control	CASI
HH-G	Hitchhiker-G (Shuttle cargo bay sidewall mounted carrier for small experiments)	CASI
HH-G1	Hitchhiker-G1 (Demonstration flight of Hitchhiker-G hardware)	CASI
HH-M	Hitchhiker-M (Shuttle cargo bay across-bay carrier for small experiments)	CASI
HHS	Health and Human Services	CASI
HI	Human Interaction	Langley
HICAT Project	High Altitude Clear Air Turbulence	CASI
HICAT Project	High Resolution Coverage Antenna Technique	CASI
HIEFOGS	High Efficiency Faint Object Infrared Grating Spectrometer	Goddard
HIFE	Hardware Interface Emulator	Goddard
HIIS	Heavy Ions In Space	CASI
HILAT	High Latitude Satellite	CASI
HiMAT	Highly Maneuverable Aircraft Technology	CASI
HIMS	Hubble Imaging Michaelson Spectrometer	Goddard
HIP	Hardware Interface Processor	Goddard
HIP	Hot Iso-static Press	Goddard
HIP	Hot Isostatic Pressing	CASI
HIPLEX	High Plains Cooperative Program (Big Springs, TX)	CASI
HIPPARCOS	High Processor Parallax Collecting Satellite	Goddard
HIPPI	High Performance Parallel Interface	Langley
HIRAP	High-Resolution Accelerometer Package (OEX)	Langley
HiRAP	High Resolution Accelerometer Package	CASI
HIRDLS	High-Resolution Dynamics Limb Sounder	CASI
HIREGRS	High Resolution Gamma Ray Spectrometer (University of California-Berkeley)	Goddard
HIREXS	High Resolution X-ray Spectrometer (University of California-Berkeley)	Goddard
HIRF	High Intensity Radiated Fields	CASI
HIRF	High Intensity Radio Frequency	CASI
HIRIS	High Resolution Imaging Spectrometer	CASI
HIRL	High Intensity Runway Lights	CASI
HIRS	High Resolution Infrared Radiation Sounder	Goddard
HIRS	High Resolution Infrared Sounder	CASI
HIRS/MSU	High Resolution Infrared Sounder/Microwave Sounding Unit	CASI
HIRT	High Reynolds Number Tunnel	CASI
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HIS	High Resolution Spectroscopy Mission	Goddard
HIS	High-Resolution Interferometer Spectrometer	Langley
HIS	Horizontal Situation Indicator	CASI
HIS	HST Instrument Servicing	Goddard
HISEC	High Stability Engine Control	Goddard
HISM	Hot Interstellar Medium	CASI
HIT	Heavy Ion Telescope	Goddard
HITAB Program	High-Altitude Target and Background Program	CASI
HITAR	HST Integration and Test Anomaly Report	Goddard
HITEN	Japanese Lunar Trajectory Probe Mission, 1993	Goddard
HITV	High-speed Interplanetary Tug/Cocoon Vehicle	CASI
HIVES	High Volume Electrostatic Sampler	CASI
HIVOS	High Vacuum Orbital Simulator	CASI
HKPS	Housekeeping Power Supply	Goddard
HL	Holiday Leave	Goddard
HLCL	High Level Command Language	Goddard
HLD	High Level Discrete (Command Type)	Goddard
HLH	Heavy-Lift Helicopter	CASI
HLLV	Heavy Lift Launch Vehicle	CASI
HLP	Helper	Langley
HMB	3-hydroxy-3-methyl butene	CASI
HMC	Halley Multicolor Camera	CASI
HMD	Helmet-Mounted Display	CASI
HME	Handheld Microgravity Experiment	CASI
HMF	Health Maintenance Facility	CASI
HMMR	High Resolution Multifrequency Microwave Radiometer (Earth Observing System, EOS)	CASI
HMX	Cyclotetramethylene Tetranitramine	CASI
HMXB	High-Mass X-ray Binary	CASI
HNLC	High Nutrient, Low Chlorophyll	Goddard
HNPF	Hallam Nuclear Power Facility	CASI
HNST	Hexanitrostilbene	CASI
HOB	High-Order Bit	Goddard
HOB	High-Order Byte	Goddard
HOE	Holographic Optical Elements	CASI
HOL	Higher Order Language	Goddard
HOMS	Hubble Optical Mechanical Simulator	Goddard
HOP	High Output Paraffin	Goddard
HOPA	High Output Paraffin Actuator	Goddard
HOPE	Halley Optical Probe Experiment	CASI
HOPE Spacecraft	Hydrogen Oxygen Spacecraft	CASI
HOS	Human Operator Simulator	Langley
HOSC	Huntsville Operations Support Center	Goddard
HOST	HST Orbital Systems Test	Goddard
HO-W	Hydrographic Office Washington, DC	CASI
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HP	Heat Pipe	Goddard
HP	Hewlett Packard	Goddard
HP	High Power	Goddard
HPA	High-Pressure Air	Langley
HPC	High Performance Computing	CASI
HPC	High Pulse Command	Goddard
HPCC	High Performance Computing and Communications program	CASI
HPCC	High Performance Computing Center	Goddard
HPCCP	High Performance Computing and Communications Program	Langley
HPCCPT-1	High Performance Computing and Communications Program Testbed-1	Langley
HPCE	High Power Control Electronics	Goddard
HPCG	Handheld Protein Crystal Growth	CASI
HPCI	High Performance Computing Initiative	CASI
HPD	Half Power Diameter	Goddard
HPE	Hexakis (NF2) Dipropyl Ether	CASI
HPHX	Heat Pipe Heat Exchanger	Goddard
HPM	High Performance Motor	CASI
HPM	High Power Microwave	CASI
HPOTP	High Pressure Oxidizer Turbopump	CASI
HPP	Heat Pipe Performance & Working Fluid Behavior in Microgravity	CASI
HPP-2	Heat Pipe Performance Experiment	Goddard
HPSS	High Performance Storage System	CASI
HPTE	High Precision Tracking Experiment	CASI
HPU	Hydraulic Power Units	CASI
HPU	Hydraulic Pumping Unit	CASI
HQ	Headquarters	Goddard
HQAM	Hardware Quality Assurance Manual	Goddard
HQS	Headquarters	CASI
HR	Hazard Report	Goddard
HRA	High Resolution Apodizer	Goddard
HRC	High Rate Channel	Goddard
HRC	High Resolution Camera	Goddard
HRDI	High-Resolution Doppler Image	Langley
HRDL	High Rate Data Link	Goddard
HRFPI	High Resolution Fabry-Perot Interferometer	Goddard
HRG	Hemispherical Resonator Gyro	Goddard
HRG	High Rate Gyro	Goddard
HRI	High Resolution Imager	CASI
HRIR	High Resolution Infrared Radiometer	CASI
HRIS	High Resolution Infrared Sounder	CASI
HRMA	High Resolution Mirror Assembly	CASI
HRMS	Human Resources Management Specialist	Goddard
HRPT	High-Resolution Picture Transmission	CASI
HRS	Heat Rejection System	Goddard
HRS	High Rate Switch	Goddard
HRS	High-Resolution Spectrograph	CASI
HRSAS	High Resolution Small Area Sensor	Goddard
HRSGS	High Resolution Shuttle Glow Spectroscopy	CASI
HRSO	High Resolution Solar Observatory	Goddard
HRSPIN	Hampton Roads Software Process Improvement Network	Langley
HRTC	High Resolution Telescope Cluster	CASI
HRTEM	High Resolution Transmission Electron Microscopy	CASI
HRTS	High Resolution Telescope Spectrometer	Goddard
HRTS	High Resolution Telescope and Spectrograph - (Orbiting Solar Laboratory)	CASI
HRTTS	High Rate Telemetry Test Set	Goddard
HRTV	Human Rated Thermal Vacuum	Goddard
HS-376 RET	HS-376 Retrieval (Salvage of HS-376 communications satellites launched on the tenth Shuttle mission)	CASI
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HSB	Humidity Sounder for Brazil	Goddard
HSCT	High Speed Civil Transport	CASI
HSDMC	High Speed Direct Multiplex Control	Goddard
HSF	Human Space Flight	Goddard
HSI	High-Speed Interferometer (Space-developed remote detector of smog)	CASI
HSIF	Hardware Software Integration Facility	Goddard
HSM	Harmonic Subcarrier Method	CASI
HSP	High Speed Photometer	Goddard
HSR	High Speed Research	Goddard
HSRL	High Spectral Resolution Lidar	CASI
HSRP	High Speed Research Program	CASI
HSS	High Speed Serial	Goddard
HST	Hypersonic Transport	CASI
HST	Hubble Space Telescope	CASI
HSTAR	HST Anomaly Report	Goddard
HSTDEK	Hubble Space Telescope Design/Engineering Knowledge base	CASI
HSTOMS	Hubble Space Telescope Observatory Management System	Goddard
HSTP	Hubble Space Telescope Project	Goddard
HSTP-G	Hubble Space Telescope Project – Goddard	Goddard
HSTSM	Hubble Space Telescope Salvage Mission	CASI
HSVP	High Speed Vector Processor	CASI
HTAH	High Temperature Air Heat (for magnetohydrodynamics power plants)	CASI
HTFFR	High Temperature Fast Flow Reactor	CASI
HTGI	How To Get It	CASI
HTGR	High Temperature Gas-cooled Reactor	CASI
HTML	Hypertext Markup Language	CASI
HTPB	Hydroxy Terminated Polybutadiene Polymer (Propellant)	CASI
HTS	High Temperature Superconducting	Goddard
HTSC	High Temperature Superconductors	CASI
HTT	High-Temperature Tunnel	Langley
HTTP	Hyper Text Transfer Protocol	Goddard
HTXS	Next-Generation of H-2 Transfer Vehicle	Goddard
HUBEX	Huaihe Basin Experiment	Goddard
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HUD	Department of Housing and Urban Development	CASI
HUD	Head Up Display	CASI
HUM	Health and Usage Monitoring Systems	CASI
HUT	Hopkins Ultraviolet Telescope	Goddard
HV	High Voltage	Goddard
HVAC	Heating Ventilation and Air Conditioning	CASI
HVAC	High-Voltage Alternating Current	CASI
HVC	Huntsville Voice Control	Goddard
HVPS	High Voltage Power Supply	Goddard
HWCTR	Heavy Water Components Test Reactor	CASI
HXIS	Hard X-ray Imaging Spectrometer	CASI
HXLV	Hyper-X Launch Vehicle	Goddard
HXRBS	Hard X-ray Burst Spectrometer	CASI
HXT	Hard X-ray Telescope	Goddard
HYD	Hydraulics (Space Shuttle)	CASI
HYFLEX	Hypersonic Flight Experiment	CASI
HYMOSS	Hybrid Mosaic on Stacked Silicon	CASI
HYPULSE	Shocktube facility at GASL	Langley
HySTP	Hypersonic Systems Technology Program	Langley
Hz	Hertz	CASI
HZE	Highly Ionizing Radiation	Langley
HZE	(High-ionizing high energy particles)	CASI
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