Apollo acronyms

From The Space Library

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Revision as of 02:49, 28 July 2021

Apollo era acronyms

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