A c r o n y m s

An acronym is a word formed from the first letters of the words in a phrase. For example, NASA is an acronym for National Aeronautics and Space Administration.

A

AFD      Aft Flight Deck 
A/G      Air to Ground 
AMET     Accumulated Mission Elapsed Time 
AOS      Acquisition of Signal 
APS      Alternate Payload Specialist 
ASI      Agenzia Spaziale Italiana (Italian Space Agency) 
AST      Astro Star Tracker 
ATL      Attitude Timeline 
ATTDOC   Attitude Documentation 

B

BOS      Bright Object Sensor 

C

CAPCOM   Capsule Communicator 
CCBD     Configuration Control Board Directive 
CCP      Contingency Control Panel 
CCTV     Closed Circuit Television 
CDR      Commander 
CDT      Central Daylight Time 
CG       Center of Gravity 
CIC      Crew Interface Coordinator 
CPE      Crew Procedure Engineer 
CST      Central Standard Time 

D

DAP      Digital Autopilot 
DCORE    Deployer Core Equipment (STS-75: TSS-1R) 
DEC      Declination 
DEP      Dedicated Experiment Processor 
DFA      Data Flow Analyst 
DMC      Data Management Controller 
DREP     Data Replanner 
DRIRU    Dry Rotor Inertial Reference Unit 

E

EC       Experiment Computer 
ECAS     Experiment Computer Application Software 
ECOS     Experiment Computer Operating System 
ECR      Engineering Change Request 
ECS      Environment Control System 
EFORD    Experiment Functional Objectives Requirements Document 
EOM      End-of-Mission 
EPDS     Electrical Power Distribution System 
EST      Eastern Standard Time 
EVA      Extra Vehicular Activity 
EXP      Experiment 

F

FCS      Flight Control System 
FDD      Flight Definition Document 
FES      Flash Evaporator System 
FO       Functional Objective 

G

GI       Guest Investigator 
GMT      Greenwich Mean Time 
GSTDN    Ground Station Tracking Data Network 

H

HDRR     High Data Rate Recorder 
H/O      Hand Over 
hr       Hour 
HRM      High Rate Multiplexor 
HUT      Hopkins Ultraviolet Telescope (STS-67 Astro-2) 

I

IDIN     Identification Initial (STS-67 Astro-2) 
IDOP     Identification Operational (STS-67 Astro-2) 
IFM      In Flight Maintenance 
IMC/IMCS Image Motion Compensation System (STS-67 Astro-2) 
IMU      Inertial Measurement Unit 
IN       Inertial 
IPS      Instrument Pointing System (STS-67 Astro-2) 
IWG      Investigators Working Group 

J

JSC      Johnson Space Center 

K

km       Kilometer 
KSC      Kennedy Space Center 
kWh      kilowatt hour 

L

LOS      Loss of Signal 
LOT      Lock On Target 
LV       Local Vertical 

M

MBPS     Mega Bits Per Second 
MDE      Mission Dependent Equipment 
MET      Mission Elapsed Time 
min      Minute 
mm       Milimeter 
MMU      Mass Memory Unit 
MPE      Mission Peculiar Equipment 
MPESS    Mission Peculiar Equipment Support Structure (STS-75) 
MS       Mission Specialist 
MSCI     Mission Scientist 
MSFC     Marshall Space Flight Center 
MTA      Manual Target Acquisition (STS-67 Astro-2) 

N

nm       Nautical Mile 

O

OAE      Orbital Analysis Engineer 
OC       Operations Controller 
OCR      Operations Change Request 
OMIS     Operations Management Information System 
OMS      Orbital Maneuvering System 
OPS      Operations 
OSP      Optical Sensor Package (STS-67 Astro-2) 

P

PADM     Portable Audio Data Modem 
PAO      Public Affairs Office 
PAP      Payload Activity Planner 
PAYCOM   Payload Commander 
PCAP     Payload Crew Activity Plan 
PCR      Payload Control Room 
PFDF     Payload Flight Data File 
PI       Principal Investigator 
PLT      Pilot 
PMIC     Payload Mission Integration Contractor 
POCC     Payload Operations Control Center 
POD      Payload Operations Director 
PRCS     Primary Reaction Control System 
PRE      Payload Replanning Engineer 
PRT      Payload Replanning Team 
PS       Payload Specialist 
PSE      Payload Systems Engineer 
PSR      Payload Support Room 
PTS      Payload Timeline Summary 

Q

R

RA       Right Ascension 
RAU      Remote Acquisition Unit 
RCS      Reaction Control System 
ROPE     Research on Orbital Plasma Electrodynamics (STS-75: TSS-1R) 
RR       Replanning Request 

S

SAA      South Atlantic Anomaly 
SAREX    Shuttle Amateur Radio Experiment 
SC       Subsystem Computer 
SCAS     Subsystem Computer Application Software 
SCORE    Satellite CORE equipment (STS-75: TSS-1r) 
SCOS     Subsystem Computer Operating System 
sec      Second (as in time) 
SL       Spacelab 
SLUK     Spacelab Utility Kit 
SOPG     Science Operations Planning Group 
SPREE    Shuttle Potential & Return Electron Experiment (STS-75: TSS-1R) 
SSP      Space Shuttle Program 
STS      Space Transportation System 
S/W      Software 

T

TAL      Trans-Atlantic Landing 
TBE      Teledyne Brown Engineering 
TDRS     Tracking & Data Relay Satellite 
TDRSS    Tracking & Data Relay Satellite System 
TEMAG    Tether Magnetic Field Experiment (STS-75: TSS-1R) 
TIG      Time of Ignition 
TIPS     Thermal Impulse Printer System 
TLE      Timeline Engineer 
TOP      Tether Optical Phenomena (STS-75: TSS-1R) 
TSS      Tethered Satellite System (TSS-1R) 
TSS-1R   Tethered Satellite System Reflight Mission 
TV       Television 

U

UIT      Ultraviolet Imaging Telescope (STS-67 Astro-2) 
UV       Ultraviolet 

V

VRCS     Vernier Reaction Control System 
VTR      Video Tape Recorder 
VV       Velocity Vector 

W

W        West 
WUPPE    Wisconsin Ultraviolet Photo Polarimeter Experiment (STS-67 Astro-2) 

X

XOAE     Execution Orbital Analysis Engineer 

Y

Z

ZOE      Zone of Exclusion