| AC |
 |
Alternating Current |
| Actr |
|
Actuator |
| Aft / AFT |
|
Rear |
| APU |
|
Auxiliary Power Unit |
| ASA / ASA 4 |
|
Aerosurface Amplifier |
| ATVC |
|
Automatic Thrust Vector Control |
| BF |
|
Body Flap |
| BFS |
|
Backup Flight Software |
| BL |
|
Bond Line |
| CSS |
|
Control Stick Steering |
| DAP |
|
Digital Auto Pilot |
| DNMODE |
|
Down mode |
| ECLSS |
|
Environmental Control and Life Support System |
| EI |
|
Entry Interface |
| EPDC |
|
Electrical Power Distribution and Control |
| FCS |
|
Flight Control System |
| FES |
|
Flash Evaporator System |
| F/min |
|
degrees Fahrenheit per minute |
| fps |
|
Feet Per Second |
| fps2 |
|
Feet Per Second Squared |
| Fus |
|
Fuselage |
| GMT |
|
Greenwich Mean Time |
| H |
|
Altitude |
| H2O |
|
Water |
| Hyd |
|
Hydraulic |
| Hz |
|
Hertz |
| IMU |
|
Inertial Measurement System |
| Inbd / INBD |
|
Inboard |
| Iso |
|
Isolation |
| KSC |
|
Kennedy Space Center |
| L |
|
Left |
| L2L |
|
Left firing RCS jet |
| L3L |
|
Left firing RCS jet |
| LH |
|
Left Hand |
| LIB |
|
Left Inboard |
| LIE |
|
Left Inboard Elevon |
| LMG |
|
Left Main (landing) Gear |
| Ln / LN |
|
Line |
| LOB |
|
Left Outboard |
| LOE |
|
Left Outboard Elevon |
| Longn |
|
Longeron |
| LOS |
|
Loss of Signal |
| L/R |
|
Left/Right |
| LT |
|
Left |
| Mach |
|
Velocity (Mach 24 is number x speed of sound) |
| MER |
|
Mission Evaluation Room |
| M-FUS |
|
Mid Fuselage |
| MLG |
|
Main Landing Gear |
| MPS |
|
Main Propulsion System |
| ms |
|
millisecond(s) |
| Msg |
|
Message |
| Nom |
|
Nominal (normal) |
| ODRC |
|
Orbiter Data Reduction Center |
| OI |
|
Orbiter Instrumentation |
| OMS |
|
Orbital Maneuvering System |
| OPS 3 |
|
Operations software mode for entry |
| OSH |
|
Off Scale High |
| OSL |
|
Off Scale Low |
| Outbd |
|
Outboard |
| P |
|
Pressure |
| PASS |
|
Primary Avionics Software System |
| PRSD |
|
Power Reactant and Storage Distribution |
| psf |
|
Pounds per Square Foot |
| psia |
|
Pounds per Square Inch Absolute |
| PVT |
|
Pressure, Volume and Temperature |
| P/Y |
|
Pitch/Yaw |
| QBAR |
|
Dynamic Air Pressure |
| R1R |
|
Right Firing RCS jet |
| R2R |
|
Right firing RCS jet |
| R3R |
|
Right Firing RCS jet |
| R4R |
|
Right Firing RCS jet |
| RCS |
|
Reaction Control System |
| Ref / REF |
|
Reference |
| Ret |
|
Return |
| RHC |
|
Rotational Hand Controller |
| RIB |
|
Right Inboard |
| ROB |
|
Right Outboard |
| RPC |
|
Remote Power Controller |
| RSB |
|
Rudder Speed Brake |
| R/T |
|
Rock/Tilt |
| secs |
|
Seconds |
| SM1 |
|
Systems Management |
| SRB |
|
Solid Rocket Booster |
| SSME |
|
Space Shuttle Main Engine |
| STS |
|
Space Transportation System |
| Sw |
|
Switch |
| Sys |
|
System |
| TDRS (E/W) |
|
Tracking and Data Relay Satellite (East/West) |
| Temp |
|
Temperature |
| TIG |
|
Time of Ignition |
| TK |
|
Tank |
| Unlk |
|
Unlock |
| Uplk / UpLK |
|
Uplock |
| Vlv(s) |
|
Valve(s) |
| WSB |
|
Water Spray Boiler |
| x1215 |
|
Structural Location Along Fuselage |
