| Acronym
| Meaning
|
| A
| One of four Omni Directional Control Antennas, known as Omni Alpha
|
| AAP
| Apollo Applications Program
|
| ACA
| Attitude Control Assembly
|
| ACBWG
| Apollo Reentry Communications Blackout Working Group
|
| ACE
| acceptance checkout equipment; also automatic checkout equipment
|
| ACED
| AC Electronics Division, General Motors Corporation
|
| ACQ
| Acquisition
|
| ACRIM
| Active Cavity Radiometer Irradiance Monitor
|
| ADEOS
| Advanced Earth Orbiting Satellite (Japan)
|
| AEAP
| Atmospheric Effects of Aviation Program
|
| AEC
| Atomic Energy Commission
|
| AEDC
| Arnold Engineering Development Center, Air Force
|
| AES
| Apollo Extension System, forerunner of Apollo Applications Program
|
| AFETR
| Air Force Eastern Test Range
|
| AFRM
| airframe
|
| AFSC
| Air Force Systems Command
|
| AGAGE
| Advanced Global Atmospheric Gases Experiment
|
| AGC
| Automatic Ground Control
|
| AGS
| Abort Guidance System
|
| AIRS
| Atmospheric Infrared Sounder
|
| ALEP
| Apollo lunar exploration program
|
| ALHT
| Apollo Lunar Hand Tools
|
| ALIGN
| Alignment or Altitude or Alternate
|
| ALM
| Alarm
|
| ALSCC
| Apollo Lunar Surface Close-Up Camera, also known as the Gold Camera
|
| ALSD
| Apollo Lunar Surface Drill; flown on Apollo 15, 16, and 17
|
| ALSD
| Apollo lunar surface drill
|
| ALSE
| Apollo Lunar Sounder Experiment
|
| ALSEP
| Apollo Lunar Surface Experiments Package
|
| ALSRC
| Apollo Lunar Surface Return Container
|
| ALT
| Altimeter
|
| AM
| Ammeter or Amplitude Modulation
|
| AMP
| Ampere or Amplifier
|
| AMP-HR
| Ampere Hour
|
| AMR
| Altimetry Microwave Radiometer
|
| AMS
| Apollo mission simulator
|
| AMSU
| Advanced Microwave Sounding Unit
|
| ANNUN-NUM
| Annunciator/Numerics
|
| ANT
| Antenna
|
| AOH
| Apollo operations handbook
|
| AOS
| Acquisition Of Signal or Acquisition Of Site
|
| AOT
| Alignment Optical Telescope
|
| AP
| Alpha Particle (spectrometer)
|
| AP
| Associated Press
|
| APS
| Auxiliary Propulsion System (S-IVB) or Ascent Propulsion System (LM)
|
| AR
| Relay Mode, Communications Mode of the Space Suit Communicator
|
| ARC
| Ames Research Center (Moffet Field, CA)
|
| ARIA
| Apollo Range Instrumentation Aircraft
|
| ARM
| Armed
|
| ARS
| Atmosphere Revitalization System
|
| AS
| Apollo-Saturn
|
| ASA
| Abort Sensor Assembly
|
| ASAP
| As Soon As Possible
|
| ASC
| Ascent
|
| ASE
| Active Seismic Experiment
|
| ASP
| Apollo Simple Penetrometer
|
| ASPO
| Apollo Spacecraft Program Office, MSC
|
| ASR
| Area Surveillance Radar
|
| ASSB
| Apollo Site Selection Board
|
| ASSY
| Assembly
|
| ASTER
| Advanced Spaceborne Thermal Emission and Reflection Radiometer
|
| ASTT
| Apollo Special Task Team
|
| ATCA
| Attitude & Translation Control Assembly
|
| ATM
| Apollo telescope mount
|
| ATT
| Attitude
|
| AUTO
| Automatic
|
| AUX
| Auxiliary
|
| AVAIL
| Available
|
| Average G
| Provides a measure of spacecraft average over a finite period of time
|
| AZ
| Azimuth
|
| B
| One of Four Omni Directional Control Antennas, known as Omni Bravo
|
| BAC
| Bell Aerospace Company or, before January 1970, Bell Aerosystems Company
|
| BAT or BATT
| Battery
|
| BB
| A BB is a shot pellet 0.175 inch ( 0.44 cm) in diameter, usually used in an air rifle.
|
| BCN
| Beacon
|
| BEF
| Blunt End Forward
|
| BeV
| billion electron volts
|
| BIG
| biological isolation garment
|
| BIP
| Bipropellant
|
| BMAG
| Body-Mounted Attitude Gyro
|
| BP
| Barber Pole
|
| BP
| Boilerplate
|
| BPS
| Bits Per Second or Bits Per Sample
|
| BRA
| Bag Restraint Assembly
|
| BSD
| Board on Sustainable Development
|
| BSLSS
| Buddy Secondary Life-Support System
|
| BTH
| Both
|
| BTU
| British thermal unit
|
| BUSS
| Biomedical Urine Sampling System
|
| C
| One of Four Omni Directional Control Antennas, known as Omni Charlie
|
| CAB
| Cabin
|
| CAL
| Calibrate or Calibration
|
| CALC
| Calculate or Calculated
|
| CAPCOM
| Spacecraft Communicator
|
| CARIDS
| customer acceptance review item dispositions
|
| CARR
| Customer Acceptance Readiness Review
|
| CASE
| Coordinated Aerospace Supplier Evaluation
|
| CB
| Circuit Breaker
|
| CBL
| Cable
|
| C-BND
| C-Band
|
| CC
| Contact Closure
|
| cc
| cubic centimeter(s)
|
| CCB
| Configuration Control Board
|
| CCFF or C Squared-F Squared
| Crew Compartment Fit and Function
|
| CCIG
| Cold Cathode Ion Gauge experiment
|
| CDH
| Constant Delta Height
|
| CDR
| Commander
|
| CDU
| Coupling Data Unit
|
| CERES
| Clouds and the Earth's Radient Energy System
|
| CES
| Control Electronics Section
|
| CG
| Center of Gravity
|
| CGCR
| Committee on Global Change Research
|
| CHAR
| Character
|
| CIESIN
| Consortium for International Earth Science Information Network
|
| CIR
| Circuit or Circuit Breaker
|
| CIRC
| Circularization
|
| CL
| Close
|
| CLIVAR
| Climate Variability (WCRP program)
|
| CLSD
| Closed
|
| CM
| Command Module
|
| cm
| centimeter(s)
|
| cm
| centimeter, centimeters
|
| CM
| Command module
|
| CMC
| Command Module Computer
|
| CMD
| Command
|
| CMDED
| Commanded
|
| CMP
| Command Module Pilot
|
| CNTL
| Control
|
| CO2
| Carbon Dioxide
|
| COAS
| Crewman Optical Alignment Sight
|
| COMM
| Communications
|
| COMP
| Compare or Component
|
| COND
| Condition, Conditioning or Conditioner
|
| Config
| Configuration
|
| CONT
| Continue
|
| COOL
| Coolant
|
| CP
| Command Pilot or Control Point
|
| CPLEE
| Charged Particle Lunar Environment Experiment
|
| cps
| cycles per second (see Hz)
|
| CRD
| Cosmic Ray Detector; flown on Apollo 16 and 17
|
| CRSFD
| Crossfeed
|
| CRT
| Cathode-Ray-Tube
|
| CRYO
| Cryogenic
|
| CSC
| Close-up Stereo Camera or Contingency Sample Collection
|
| CSI
| Coeliptic Sequence Initiation
|
| CSM
| Command and Service Module
|
| CSRC
| Contingency Sample Return Container
|
| CTG
| Cartridge
|
| CTV
| Color Television
|
| cu m
| cubic meter, cubic meters
|
| CUR
| Current
|
| CWEA
| Caution and Warning Electronics Assembly
|
| CWG
| Constant Wear Garment, the Long-Johns
|
| D
| Downward Thrusting RCS Engine or One of Four Omni Directional Control Antennas, known as Omni Delta
|
| DAAC
| Distributed Active Archive Center
|
| DAC
| Digital to Analog Converter or Data Acquisition Camera
|
| DAP
| Digital Autopilot
|
| DB
| Decibel
|
| DC
| Direct Current
|
| DCA
| Digital Command Assembly
|
| DCR
| Design Certification Review
|
| DECA
| Descent Engine Control Assembly
|
| DECR
| Decrease
|
| DEDA
| Data Entry and Display Assembly
|
| DEG
| Degree
|
| degrees C
| degrees Celsius (centigrade)
|
| degrees F
| degrees Fahrenheit
|
| Delta H
| Height Difference
|
| Delta P
| Pressure Difference
|
| Delta T
| Time Difference
|
| Delta V
| Change in Velocity
|
| DESC
| Descent
|
| DET
| Detent or Detector or Digital Event Timer
|
| DF
| Direction Finding
|
| DFI
| Development Flight Instrumentation
|
| DIFF
| Difference or Differential
|
| DIG
| Digital
|
| DIR
| Direct
|
| DISCH
| Discharge
|
| DISP
| Display
|
| DIV
| Diverter
|
| Dixie Cup
| individual sample bags that were used on Apollo 12, 14, and 17.
|
| DLAY
| Delay
|
| DOD
| Department of Defense
|
| DOI
| Descent Orbit Insertion
|
| DORIS
| Doppler Orbitography and Radiopositioning Integrated by Satellite
|
| DPLY
| Deploy or Deployed
|
| DPS
| Descent Propulsion System
|
| DR
| Dead Reckoning or Descent Rate
|
| DRT
| Dome Removal Tool
|
| DSE
| Data Storage Equipment
|
| DSEA
| Data Storage Electronics Assembly
|
| DSKY
| Display and Keyboard
|
| DSN
| Deep Space Network
|
| EASEP
| Early Apollo Surface Experiment Package
|
| ECA
| Electrical Control Assembly
|
| ECOM
| Electronics Communications
|
| ECP
| engineering change proposal
|
| ECS
| Environmental Control System
|
| ECS
| EOSDIS Core System
|
| ED
| Explosive Device
|
| EDCP
| engineering design change proposal
|
| EDD
| Engineering and Development Directorate
|
| EDOS
| EOS Data and Operations System
|
| EDS
| Emergency Detection System
|
| E-DUMP
| Memory Download from Spacecraft; also known as E-MOD
|
| ELS
| Earth Landing System
|
| ELV
| Expendable Launch Vehicle
|
| EMI
| Electromagnetic Interference
|
| E-MOD
| Memory Download from Spacecraft; also known as E-DUMP
|
| EMS
| entry monitor system
|
| EMU
| Extravehicular Mobility Unit; Space Suit and Backpack combination
|
| EO
| engineering order
|
| EOCAP
| Earth Observation Commercial Applications Program
|
| EOS
| Earth Observing System
|
| EOS-AM1
| EOS morning equatorial crossing (descending) satellite
|
| EOS-CHEM1
| EOS Chemistry satellite
|
| EOSDIS
| EOS Data and Information System
|
| EOSP
| Earth Observing Scanning Polarimeter
|
| EOS-PM1
| EOS afternoon equatorial crossing (ascending) satellite
|
| EPS
| Electrical Power System
|
| ERAST
| Experimental Research Aircraft Sensor Technology
|
| ESSAAC
| Earth System Science and Applications Advisory Committee
|
| ESSP
| Earth System Science Pathfinder
|
| ETB
| Equipment Transfer Bag
|
| ETM+
| Enhanced Thematic Mapper-Plus
|
| EV
| Extravehicular
|
| eV
| electron volts(s)
|
| EVA
| Extravehicular Activity
|
| EVCS
| Extravehicular Communications Systems
|
| F
| Fahrenheit or Forward Thrusting RCS Engine
|
| FAI
| Fédération Aéronautique International (International Aeronautical Federation)
|
| FAIL
| Failure
|
| FAM
| Familiarization
|
| FCOD
| Flight Crew Operations Directorate
|
| FCSM
| flight combustion stability monitor
|
| FDAI
| Flight Director Attitude Indicator
|
| FDO or FIDO
| Flight Dynamics Officer
|
| Fiducial
| Hasselblad cameras superimposed references marks (crosses) on the film
|
| Filling a Square
| checking a box in XY axes on a to do list
|
| FITH
| Fire In The Hole
|
| FL
| Flag
|
| FM
| Frequency Modulation
|
| FOD
| Flight Operations Directorate
|
| FOO
| Flight of Opportunity
|
| FP
| Flight Progress
|
| fps
| feet per second
|
| FRAG
| Fragment
|
| FREQ
| Frequency
|
| FRR
| Flight Readiness Review
|
| ft
| foot, feet
|
| FTT
| Fuel Transfer Tool
|
| FUS
| Far-Ultraviolet Spectrometer
|
| FWD
| Forward
|
| g
| gram, gravity
|
| G
| specific gravity
|
| G&C
| Guidance and Control
|
| G&N
| Guidance and Navigation
|
| GAEC
| Grumman Aircraft Engineering Corporation
|
| GAO
| General Accounting Office
|
| GAO
| Government Accounting Office
|
| GASC
| Gas Analysis Sample Container
|
| GASTA
| Gimbal Angle Sequencing Transformation Assembly
|
| GCA
| Ground Controlled Approach
|
| GCTA
| Ground-Command Television Assembly
|
| GDA
| Gimbal Drive Actuator
|
| GDC
| Gyro Display Coupler
|
| GDO
| Guidance Dynamics Officer
|
| GE
| General Electric
|
| GE
| General Electric Company
|
| GE
| General Electric Company
|
| GET
| Ground-Elapsed Time
|
| GETI
| Ground-Elapsed Time of Ignition
|
| GEWEX
| Global Energy and Water Cycle Experiment
|
| GFE
| government-furnished equipment
|
| GLAS
| Geoscience Laser Altimeter System
|
| GLEP
| Group for Lunar Exploration Planning
|
| GLY
| Glycol
|
| GMBL
| Gimbal
|
| GMT
| Greenwich mean time
|
| GNCS
| Guidance, Navigation and Control System
|
| GND
| Ground
|
| Gnomon
| weighted staff suspended on a two-ring gimbal and supported by a tripod
|
| GOX
| Gaseous Oxygen
|
| GOALS
| Global Ocean-Atmosphere-Land System (WCRP program)
|
| GSE
| ground support equipment
|
| GSFC
| Goddard Space Flight Center (Greenbelt, MD)
|
| GUID
| Guidance
|
| H
| Height (altitude)
|
| H/H
| Altitude or Altitude Rate
|
| H/X
| Heat Exchanger
|
| H2O
| Water
|
| HALOE
| Halogen Occultation Experiment
|
| HBLAD
| Hasselblad Camera
|
| HBR
| High Bit Rate
|
| HCEX
| Highspeed Color Ektachrome Film
|
| H-Dot
| Time derivative of height (altitude); Descent Rate or Ascent Rate
|
| HE
| Helium
|
| HEAO
| High Energy Astronomy Observatory (satellite)
|
| HEDC
| Hasselblad Electric (Electronic?) Data Camera
|
| HEDS
| Human Exploration and Development of Space
|
| HF
| High frequency
|
| HFE
| Heat Flow Experiment or Heat Flow Electronics
|
| HGA
| High Gain Antenna
|
| HI
| High
|
| HIRDLS
| High Resolution Dynamics Limb Sounder
|
| HL
| High Level
|
| HLD
| Hold
|
| HSD
| High Speed Data
|
| HTC
| Hand-Tool Carrier
|
| HV
| High Voltage
|
| HVR
| Hover
|
| Hz
| hertz (unit of frequency: 1 cycle per second)
|
| IAU
| International Astronomical Union
|
| IBM
| International Business Machines Corporation
|
| ICBC
| Interagency Committee on Back Contamination
|
| ICS
| Intercommunications System
|
| ID
| Identification
|
| IFR
| Instrument Flight Rules
|
| IG
| Inner Gimbal
|
| IGA
| Inner Gimbal Angle
|
| IGBP
| International Geosphere-Biosphere Programme
|
| IGN
| Ignition
|
| IGOS
| Integrated Global Observing Strategy
|
| ILS
| Instrument Landing System
|
| IMU
| inertial measurement unit
|
| IN
| Inlet
|
| in
| inch, inches
|
| INCO
| Instrumentation and Communications Officer
|
| INCR
| Increase
|
| INJ
| Injector
|
| INST
| Instrumentation
|
| INTEG
| Integrity
|
| INVTR
| Inverter
|
| IP
| Initial Point
|
| IPCC
| Intergovernmental Panel on Climate Change
|
| IPI
| Integrated Position Indicator
|
| IRIG
| Inertial Rate Integrating Gyro
|
| ISA
| Interim Stowage Assembly
|
| ISOL
| Isolation
|
| ISR
| Infrared Scanning Radiometer
|
| ISS
| Inertial Sensor System or Interim Stowage Shelf
|
| ITT
| International Telephone and Telegraph Corporation
|
| IU
| Instrument Unit
|
| IV
| Intravehicular Activity
|
| J
| joule
|
| JD
| Jet Driver
|
| JETT
| Jettison
|
| JPL
| Jet Propulsion Laboratory (Pasadena, CA)
|
| JSC
| Johnson Space Center (Manned Spacecraft Center before February 1973)
|
| K
| Kelvin scale
|
| K-bird
| KC-135 aircraft
|
| kg
| kilogram, kilograms
|
| km
| kilometer(s)
|
| km/hrs
| kilometers per hour
|
| KSC
| Kennedy Space Center
|
| LACE
| Lunar Atmospheric Composition Experiment
|
| LAD
| Lunar Atmosphere Detector
|
| LAM
| Landing Area Map (???)
|
| LaRC
| Langley Research Center (Hampton, VA)
|
| LAT
| Latitude or Lateral
|
| LATI
| Landsat Advanced Technology Instrument
|
| lb
| pound
|
| LBR
| Low Bit Rate
|
| lbs
| pounds
|
| LC
| Launch Complex
|
| LCG
| Liquid-Cooled Garment
|
| LCRU
| Lunar Communications Relay Unit
|
| LDD
| Lunar Dust Detector
|
| LDG
| Landing
|
| LEAM
| Lunar Ejecta And Meteorite (experiment)
|
| LEB
| Lower Equipment Bay
|
| LEC
| Lunar Equipment Conveyor
|
| LEM
| Lunar excursion module
|
| LeRC
| Lewis Research Center (Cleveland, OH)
|
| LES
| Launch escape system
|
| LEV
| Launch escape vehicle
|
| LEVA
| Lunar Extravehicular Visor Assembly
|
| LGC
| Lunar Module Guidance Computer
|
| LGI
| lunar geology investigation
|
| LHSSC
| Left-Hand Side Stowage Compartment
|
| LIM
| Limit or Limits
|
| LioH
| Lithium Hydroxide
|
| LION
| Lunar International Observer Network
|
| LIS
| Lightening Imaging Sensor
|
| LLRF
| Lunar Landing Research Facility
|
| LLRV
| Lunar Landing Research Vehicle
|
| LLTV
| Lunar Landing Training Vehicle
|
| LM
| Lunar Module
|
| LMP
| LM Mission Programmer or Lunar Module Pilot
|
| LMS
| Lunar Mass Spectrometer or Lunar Module Simulator
|
| LMSS
| lunar mapping and survey system
|
| LNA
| Lunar Navigation Aid
|
| LNP
| Lunar Neutron Probe (experiment)
|
| LO
| Low
|
| LOC
| Launch Operations Center
|
| LOI
| Lunar Orbit Insertion
|
| LOLA
| lunar orbit and landing approach
|
| LONG
| Longitude
|
| LOPC
| Lunar Orbit Plane Change
|
| LOS
| Loss Of Signal or Loss Of Site
|
| LOX
| liquid oxygen
|
| LPD
| Landing Point Designator
|
| LPI
| Lunar and Planetary Institute
|
| LPM
| Lunar Portable Magnetometer
|
| LR
| Landing Radar
|
| LRL
| Lunar Receiving Laboratory
|
| LRRR, LR Cubed, or LR3
| Lunar Ranging Retro-Reflector
|
| LRV
| Lunar Roving Vehicle; flown on Apollo 15, 16, and 17
|
| LSB
| Least Significant Bit
|
| LSCRE
| Lunar Surface Cosmic Ray Experiment
|
| LSG
| Lunar Surface Gravimeter
|
| LSI
| Lunar Science Institute
|
| LSM
| Lunar Surface Magnetometer
|
| LSPE
| Lunar Seismic Profiling Experiment
|
| LSUC
| Lunar Surface Ultraviolet Camera
|
| LTA
| lunar module test article
|
| LTC
| Lunar Topographic Camera
|
| LTG
| Lunar Traverse Gravimeter (experiment)
|
| LTV
| Ling-Temco-Vought
|
| LV
| Low Voltage
|
| LVL
| Level
|
| m
| meter, meters
|
| M&SS
| Mapping and survey system
|
| M/P
| Mortar Pack
|
| MA
| Master Alarm
|
| Mafic Minerals
| Mafic minerals are rich in magnesium and iron and are usually dark colored.
|
| MAG
| Magazine
|
| MAL
| Malfunction
|
| MAN
| Manual or Manifold
|
| MAP
| Message Acceptance Pulse
|
| mascons
| mass concentrations of dense material on lunar surface
|
| MAX
| Maximum
|
| MC
| megacycles
|
| MCC
| MidCourse Correction
|
| MCC (H) (K)
| Mission Control Center (Houston) (Kennedy)
|
| MCCH
| Mission Control Center Houston
|
| MCP
| mission control programmer
|
| MCR
| master change record
|
| MDC
| Main Display Console (CM)
|
| MDF
| mild detonating fuse
|
| MDOP
| maximum design operating pressure
|
| MELV
| Medium Expendable Launch Vehicle
|
| MESA
| Modular Equipment Stowage Assembly
|
| MET
| Mission Elapsed Time, Mission Event Timer, or Mobile Equipment Transporter
|
| MET
| mobile equipment transporter
|
| MeV
| million electron volts
|
| MFC
| Main Feeder Contactor
|
| MG
| Middle Gimbal
|
| MGA
| Middle Gimbal Angle
|
| MHS
| Microwave Humidity Sounder
|
| MHz
| megahertz (million cycles per second)
|
| mi
| mile, miles
|
| MIMR
| Multi-frequency Imaging Microwave Radiometer
|
| MIN
| Minimum
|
| min
| minute(s)
|
| Minus Y axis
| South side of the LM
|
| Minus Z axis
| East side of the LM
|
| MISR
| Multi-angle Imaging SpectroRadiometer
|
| MIT
| Massachusetts Institute of Technology
|
| MLELV
| Medium-Lite Expendable Launch Vehicle
|
| MLS
| Microwave Limb Sounder
|
| mm
| millimeter
|
| MMH
| monomethylhydrazine
|
| MOCR
| Mission Operations Control Room
|
| MODIS
| Moderate-Resolution Imaging Spectroradiometer
|
| MOL
| Manned Orbiting Laboratory
|
| MOPITT
| Measurements of Pollution in the Troposphere
|
| MPA
| Mortar Pack Assembly
|
| MPX
| Multiplex
|
| MRB
| Material Review Board
|
| MSB
| Most Significant Bit
|
| MSC
| Manned Spacecraft Center; now Johnson Space Center
|
| MSF
| Manned Space Flight
|
| MSFC
| Marshall Space Flight Center (Huntsville, AL)
|
| MSFN
| Manned Space Flight Network (pronounced "Miss Finn")
|
| MSOB
| Manned Spacecraft Operations Building at the Kennedy Space Center
|
| MSSC
| Magnetic Shield Sample Container
|
| MTPE
| Mission to Planet Earth
|
| MTR
| Meter
|
| MTVC
| Manual Thrust Vector Control
|
| Mw
| megawatt(s)
|
| N/A
| Not Applicable
|
| N2O4
| Nitrogen Tetroxide, oxidizer used in the DPS and APS
|
| NAA
| North American Aviation, Inc. (until Sept. 22, 1967)
|
| NACA
| National Advisory Committee for Aeronautics
|
| NAR (NR)
| North American Rockwell Corporation (Sept. 22, 1967-Feb. 16, 1973; then Rockwell International Corporation)
|
| NAS
| National Academy of Sciences
|
| NASA
| National Aeronautics and Space Administration
|
| NASA
| National Aeronautics and Space Administration
|
| NASA
| National Aeronautics and Space Administration
|
| NASM
| National Air and Space Museum, Smithsonian Institution
|
| NAV
| Navigation
|
| NB
| Narrow Band
|
| NDSC
| Network for Dectection of Stratospheric Change
|
| NGO
| Non-Governmental Organization
|
| nm
| nautical miles
|
| NMP
| New Millennium program
|
| NOAA
| National Oceanic and Atmospheric Administration
|
| NORM
| Normal
|
| NPOESS
| National Polar-orbiting Operational Environmental Satellite System
|
| NR
| North American Rockwell Corporation
|
| NRC
| National Research Council
|
| NSCAT
| NASA Scatterometer
|
| NSSDC
| National Space Science Data Center
|
| NTS
| Nevada Test Site
|
| O2
| Oxygen
|
| OAO
| Orbiting Astronomical Observatory (satellite)
|
| OART
| Office of Advanced Research and Technology, NASA Headquarters
|
| OAS
| optical alignment sights
|
| OB
| OnBoard
|
| OCP
| Operational Checkout Procedure
|
| OCS
| Organic Control Sample
|
| ODUS
| Ozone Dynamics Ultraviolet Spectrometer
|
| OG
| Outer Gimbal
|
| OGA
| Outer Gimbal Angel
|
| OMS
| Observation from the Middle Stratosphere
|
| OMSF
| Office of Manned Space Flight, NASA Headquarters
|
| OPN
| Open
|
| OPR
| Operate
|
| OPS
| Oxygen Purge System
|
| ORDEAL
| Orbital Rate Display Earth And Lunar
|
| ORDEAL
| orbital rate drive electronics for Apollo and LM
|
| ORI
| Operational readiness inspection
|
| OSO
| Orbiting Solar Observatory (satellite)
|
| OSSA
| Office of Space Science and Applications, NASA Headquarters
|
| OSTP
| Office of Science and Technology Policy
|
| OTD
| Optical Transient Detector
|
| OTDA
| Office of Tracking and Data Acquisition, NASA Headquarters
|
| OUT
| Outlet or Output
|
| OVR
| Over
|
| OVRD
| Override
|
| OX
| Oxidizer or Oxygen
|
| P00
| Program Zero-Zero, pronounced "pooh"
|
| P22
| Program 22
|
| PA
| Power Amplifier
|
| PAD
| Pre-Advisory Data
|
| PAD
| project approval document
|
| PAO
| Public Affairs Office
|
| PARC
| Public Access Resource Center
|
| Parker Valves
| part of the RCS propellant feed system
|
| PART
| Partial
|
| PCA
| Program Coupler Assembly
|
| PCM
| Pulse Code Modulation
|
| PCT
| Per Cent
|
| PDI
| Powered Descent Initiation
|
| PDR
| Preliminary Design Review
|
| PEM
| Pacific Exploratory Mission
|
| PFS
| Per Cent Full Scale
|
| PGA
| Pressure Garment Assembly
|
| PGNCS
| Primary Guidance, Navigation, and Control System
|
| PGNS
| Primary Guidance and Navigation System (pronounced "pings")
|
| PHS
| Public Health Service
|
| PI
| Principal Investigator
|
| PIB
| Pyrotechnic Installation Building
|
| PIPA
| Pulsed Integrating Pendulous Accelerometer
|
| PLSD
| Pulsed
|
| PLSS
| Portable Life Support System
|
| Plus Y axis
| North side of the LM
|
| Plus Z axis
| West side of the LM
|
| PM
| Phase Modulation
|
| PM1/NB
| Phase Modulator 1??/Narrowband
|
| PM1/WB
| Phase Modulator 1??/Wideband
|
| PNLS
| Panels
|
| PO
| Power Output
|
| pogo
| launch vehicle induced oscillations (not an acronym; derived from "pogo stick" analogy)
|
| POLARIS
| Photochemistry of Ozone Loss in the Arctic Region in Summer
|
| POS
| Position
|
| PPK
| Personal Preference Kits
|
| PQMD
| Propellant Quantity Measuring Device
|
| PR
| Precipitation Radar
|
| PRA
| Program Reader Assembly
|
| PRD
| Personal Radiation Dosimeter
|
| PRELIM
| Preliminary
|
| PRESS
| Pressure
|
| PRIM
| Primary
|
| PRO
| Proceed
|
| PROG
| Program
|
| PROP
| Propellant or Propulsion
|
| PSAC
| President's Scientific Advisory Committee
|
| PSE(P)
| Passive Seismic Experiment (Package)
|
| psi
| pounds per square inch
|
| PSIA
| Pounds Per Square Inch Absolute
|
| psia
| pounds per square inch absolute
|
| psia
| pounds per square inch average
|
| PSID
| Pounds Per Square Inch Differential
|
| PTA
| Pulsed Torque Assembly
|
| PTC
| Passive Thermal Control; also known as the Barbeque mode
|
| PTT
| Push-To-Talk
|
| PTV
| parachute test vehicle
|
| PVR
| Percent Voltage Reference
|
| PWM
| Pulse Width Modulation
|
| PWR
| Power
|
| PYRO
| Pyrotechnic
|
| QD
| Quick Disconnect
|
| QTY
| Quantity
|
| QUAD
| Quadrant
|
| R
| (Computer) Register
|
| RAD
| Radiation
|
| Range Rate
| Change in range per unit time
|
| RASPO
| Resident Apollo Spacecraft Program Office
|
| RC/OC
| Reverse Current/OverCurrent
|
| RCA
| Radio Corporation of America
|
| RCS
| Reaction Control System
|
| RCU
| Remote Control Unit
|
| RCVR
| Receiver
|
| R-Dot
| Rate of Change in range; rate of approach
|
| REACQ
| Reacquire
|
| REC
| Recorder
|
| RECD
| Received
|
| REF
| Reference
|
| REFSMMAT
| Reference Stable Member Matrix or, sometimes, Reference to Stable Member Matrix
|
| REG
| Regulator
|
| REL
| Release
|
| RET
| Retract or Return
|
| REV
| Reverse
|
| RF
| Radio Frequency
|
| RFLT
| Reflect or Reflected
|
| RGA
| Rate Gyro Assembly
|
| RLS
| Radius of Landing Site or Reference Landing Site
|
| RLY
| Relay
|
| RNG
| Range or Ranging
|
| ROD
| Rate of Descent
|
| RPV
| Remotely Piloted Vehicle
|
| RR
| Rendezvous Radar
|
| RS
| Remote Site
|
| RSVR
| Resolver
|
| RTCC
| Real Time Computer Complex
|
| RTG
| Radioisotopic Thermoelectric Generator
|
| RTV
| Room Temperature Vulcanising
|
| RUPT
| Rupture
|
| S
| Sideward Thrusting RCS Engine
|
| S/C
| spacecraft
|
| S/O
| Shut Off
|
| S/S
| Samples per Second
|
| SAGE III
| Stratospheric Aerosol and Gas Experiment III
|
| SAMSO
| Space and Missiles Organization, Air Force
|
| SAR
| Synthetic Aperture Radar
|
| SAS
| Space Adaptation Syndrome
|
| S-BND
| S-Band
|
| SBT
| S-Band Transponder
|
| SCB
| Sample Collection Bag
|
| SCE
| Signal-Conditioning Equipment
|
| SCS
| Stabilization and Control System
|
| SE
| Systems Engineer
|
| SeaWiFS
| Sea-Viewing Wide Field Sensor
|
| SEB
| Scientific Equipment Bay
|
| SEB
| Source Evaluation Board
|
| SEC
| Secondary, Second, or Special Environmental Container
|
| sec
| second(s)
|
| SECS
| Sequential Events Control System
|
| SEF
| Sharp End Forward
|
| SEL
| Select
|
| SENS
| Sensitivity
|
| SEP
| Separation, Separator, or Surface Electric Properties (experiment)
|
| SEQ
| Sequence or Scientific Equipment Bay
|
| SEQ
| scientific equipment
|
| SESC
| Special Environmental Sample Container
|
| SESL
| Space Environmental Simulation Laboratory
|
| SET
| Set or Setting
|
| SEVA
| Stand-up extravehicular activity
|
| SHE
| SuperCritical Helium
|
| S-IB
| Saturn IB launch vehicle first stage
|
| S-IC
| Saturn V launch vehicle first stage
|
| SID
| Space and Information Systems Division, NAA
|
| SIDE
| Suprathermal Ion Detection Experiment
|
| SIG
| Signal
|
| S-II
| Saturn second stage
|
| SIM
| Scientific Instrument Module or Simulation
|
| SIR-C/X-SAR
| Spaceborne Imaging Radar-C/X-band SAR
|
| S-IVB
| Saturn IB second stage; Saturn V third stage
|
| SLA
| Spacecraft Launch Adapter or SM/LM Adapter
|
| SLSS
| supplementary life support system
|
| SM
| Service Module
|
| SME
| Soil Mechanics Experiment
|
| SNAP-27
| System for Nuclear Auxiliary Power, Model 27
|
| SOL
| Solenoid
|
| SOLSTICE
| Solar Stellar Irradiance Comparison Experiment
|
| SONEX
| Subsonic Ozone and Nitrogen Experiment
|
| SOV
| Shut Off Valve
|
| SP
| Spare
|
| SPEC
| Specification
|
| SPF
| single point failure
|
| SPS
| Service Propulsion System
|
| sq cm
| square centimeter(s)
|
| sq m
| square meter, square meters
|
| SRC
| Sample Return Container; the rock boxes
|
| SRP
| Self-Recording Penetrometer
|
| SSALT
| Solid-State Altimeter
|
| SSC
| SpaceSuit Communicator
|
| SSC
| space suit communications
|
| SSC
| Stennis Space Center (Slidell, MS)
|
| SSD
| Sun Shadow Device
|
| SSM/I
| Special Sensor Microwave/Imager
|
| SSR
| Staff Support Room
|
| ST
| Static
|
| STAG
| Scientific and Technical Advisory Committee, university-NASA
|
| STBY
| Standby
|
| STG
| Space Task Group, NASA
|
| STGE
| Stage
|
| STL
| Space Technology Laboratories, Inc.
|
| STR
| Strength
|
| STRAT
| Stratospheric Tracers of Atmospheric Transport
|
| STRB
| Strobe
|
| SUP
| Supply
|
| SUSP
| Suspension
|
| SVO
| Servo
|
| SW
| Switch
|
| SWC
| Solar Wind Composition Collector
|
| SWIP
| Super Weight Improvement Program
|
| SWS
| Solar Wind Spectrometer
|
| SYNCH
| Synchronization
|
| SYS
| System
|
| T/G
| Thumper/Geophone Experiment
|
| TB
| TalkBack
|
| TCA
| Thrust Chamber Assembly
|
| TCP
| Thrust Chamber Pressure
|
| TCP
| test and checkout procedures
|
| TCU
| Television Control Unit
|
| TDRSS
| Tracking and Data Relay Satellite System
|
| TDS
| Thermal Degradation Sample
|
| TEI
| Transearth Injection
|
| TELEMU
| Telemetry
|
| TEMP
| Temperature
|
| Tephem
| Time of Ephemeris
|
| TES
| Tropospheric Emission Spectrometer
|
| TGE
| Traverse Gravimeter Experiment
|
| THROT
| Throttle
|
| TIG or Tig
| Time of Ignition
|
| TJM
| Tower Jettison Motor
|
| TK
| Tank
|
| TLC
| Translunar Coast
|
| TLI
| Translunar Injection
|
| TLM or TM
| Telemetry
|
| TM
| test model
|
| TMI
| TRMM Microwave Imager
|
| TOL
| Tolerance
|
| TOMS
| Total Ozone Mapping Spectrometer
|
| TOPEX/ Poseidon
| Ocean Topographic Experiment (w/France)
|
| TPI
| Terminal Phase Initiation
|
| TR
| Transmit/Receive
|
| TRACE-B
| Transport and Chemistry near the Equator-Atlantic (2nd)
|
| TRANS
| Translation
|
| Travono (possibly Travano)
| A gray-brown plastic used in the LM to protect surfaces
|
| TRMM
| Tropical Rainfall Measuring Mission (w/Japan)
|
| TRUN
| Trunnion
|
| TSB
| Temporary Stowage Bag
|
| TTCA
| Thrust/Translation Controller Assembly
|
| TTHR
| Tether
|
| TTY
| Teletype or Teletypewriter
|
| TV
| thermal vacuum-test article; also television
|
| TVC
| Thrust Vector Control
|
| U
| Upward Thrusting RCS Engine
|
| U.S.
| United States of America
|
| U.S.S.R.
| Union of Soviet Socialist Republics
|
| UARS
| Upper Atmosphere Research Satellite
|
| UCTA
| Urine Collection and Transfer Assembly
|
| UDMX
| Unsymmetrical-Dimethylhydrazine, part of the fuel for the DPS and APS
|
| UHF
| Ultra-High Frequency
|
| UHT
| Universal Handling Tool
|
| USDA
| United States Department of Agriculture
|
| USGCRP
| United States Global Change Research Program
|
| UV
| Ultraviolet
|
| UVC
| Ultraviolet Camera; flown on Apollo 16
|
| V
| Volt
|
| V sub I
| Inertial Velocity
|
| VAC
| Volts Alternating Current
|
| VAR
| Variable
|
| VDC
| Volts Direct Current
|
| VEL
| Velocity
|
| VHF
| Very High Frequency
|
| VIRS
| Visible InfraRed Scanner
|
| VLV(S)
| Valve(s)
|
| VOTE/TOTE
| Vortex Ozone Transport Experiment/ Tropical Ozone Transport Experiment
|
| VOX
| Voice Activated Transmission
|
| VPI
| Valve Position Indicator
|
| VR
| Vector Ranging
|
| VRMS
| Volt Root Mean Square
|
| W
| Watts
|
| W/B
| Water Boiler
|
| WB
| WideBand
|
| WCRP
| World Climate Research Program
|
| WIF
| Water Immersion Facility
|
| WILCO
| Will Comply
|
| WSMR
| White Sands Missile Range, Army
|
| WSTF
| White Sands Test Facility, MSC, NASA
|
| X
| Cross
|
| X Axis
| Vertical Axis
|
| XMTR
| Transmitter
|
| XPNDR
| Transponder
|
| Y Axis
| Left to Right Axis
|
| Z Axis
| Fore/Aft Axis
|
| Z Bag
| Storage Bag stored at the minus Z Bulkhead
|
