List of Acronyms and Abbreviations

• AF -
• AgP - argument of periapsis
• AN - ascending node
• ApA - apoapsis altitude
• ApD - apoapsis distance
• ApR - apoapsis radius
• ApT - time to apoapsis
• Alt - altitude
• atmo - atmosphere
• AU - astronomical unit
• CDI - course deviation indicator
• CDR - commander
• CEV - Crew Expedition Vehicle
• COM - communication or communicator
• CTRL - Control
• CVEL - closing velocity
• CVEL - Common Vessel Extensions Light, see CVEL
• DN - descending node
• DG - Delta-glider
• DG-S Delta-glider equiped with two scramjets.
• DIV - divergent, i.e. yaw gimbal mode.
• Dir - direction
• Dist - distance
• DLng - longitude difference, as seen on the synchronise orbit MFD
• DNP - dynamic pressure
• DNS - atmospheric density
• DST or Dst - distance (to target)
• DTe - time to ejection, as seen on the transfer MFD
• DTi - time to intercept, as seen on the transfer MFD
• DTmin - time of arrical difference, as seen on the synchronise orbit MFD
• Dv - delta velocity, as seen on the transfer MFD
• Ecc - eccentricity
• ECL - plane of the ecliptic
• ESA - European Space Agency
• ET - external tank
• EQU - plane of the equator
• EVA - Extra vehicular activity
• FGB - russian acronym for Functional Cargo Block. See FGB
• FoV - field of view, as seen in the general information display
• FPS - frame rate, as seen in the general information display
• G - an unit of acceleration. 1 G equals the gravity acceleration on earths surface, 9.81 m/s²
• GL - Delta-glider
• GS - ground speed
• GMT - Greenwich Mean Time.See UT [1]
• H - Horizon
• HLLV - heavy lift launch vehicle
• HUD - heads up display
• HSI - horizontal situation indicator
• HST - Hubble Space Telescope
• HTO - hypothetical orbit, as seen on the transfer MFD
• IAS - indicated air speed [2]
• IDS - instrument docking system
• ILS - instrument landing system
• Inc - Inclination
• ISP - specific impulse
• ISS - International Space Station
• JD - julian date
• KISS - "Keep it simple, stupid!" Famous engineering dogma.[3]
• KSC - Kennedy Space Center
• LAN - longitude of ascending node or local-area network
• LDEF - Long Duration Exposure Facility
• LEO - Low earth orbit
• LPe - longitude of periapsis
• m - metre
• M - Mega (SI prefix). Occasionally mass or mach number
• MCC - mid course correction
• MECO - Main Engine Cutoff
• MFD - multifunction display
• MJD - modified julian date
• MMU - Manned Maneuvering Unit
• MnA - mean anomaly
• MnL - mean longitude
• MSx - Mission Specialist x
• m/s - meters per second, the SI base unit of velocity
• NAV - navigation or navigation aid
• OAT - outside air temperature
• Ob - obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
• OBS - omni bearing selector
• OBT - orbit, as seen on the orbit MFD
• OMS - orbital maneuvering system, the 'main engines' of the orbital space shuttle
• OS - orbital speed
• P - position (sometimes radius) vector, as seen on the align orbital plane MFD
• p0 - atmospheric pressure at sea level
• PAPI - Precision Approach Path Indicators, lit runway centreline.
• PB -
• PeA - periapsis altitude
• PeD - periapsis distance
• PeR - periapsis radius
• PG - prograde
• PLT - Pilot
• Pos - position
• PRJ - projection, as seen on the orbit MFD
• PSx - Payload Specialist x
• R - mean radius or specific gas constant
• r0 - atmospheric density at sea level
• Rad - radial distance (not to be confused with angular unit radians)
• RAnm - true anomaly of reference axis, as seen on the synchronise orbit MFD
• Rate - rate of change, as seen on the align orbital plane MFD
• RCS - reaction control system, spacebourne orientation rocket system.
• RInc - relative inclination, as seen on the align orbital plane MFD
• RVel - relative velocity
• RG - retrograde
• RKA - Russian Space Agency
• RMS - Remote Manipulator System
• SDLV - Shuttle Derived Launch Vehicle
• SECO - Secondary Engine Cutoff
• Sim - simulation time (in seconds), as seen in the general information display or a common abbreviation for "simulator"
• SHP - ship, as seen on the orbit MFD
• Sh-ToR - ship time-on-reference, as seen on the synchronise orbit MFD
• SLF - shuttle landing facility, see Cape Canaveral
• SMa - semi-major axis
• SSME - Space Shuttle Main Engines [4]
• SMi - semi-minor axis
• SRB - Solid Rocket Booster [5]
• SSTO - Single Stage to Orbit
• STP - static pressure
• STS - space transportation system, space shuttle
• Tgt - target, esp. in docking mode
• Tg-ToR - target time-on-reference, as seen on the synchronise orbit MFD
• T - orbit period, measured in seconds
• TAS - true air speed [6]
• TKS - russian spacecraft for the Almaz program, see TKS
• TLE - two-line elements
• TLe - eject longitude, as seen on the transfer MFD
• TLi - intercept longitude, as seen on the transfer MFD
• TLI - Trans Lunar Injection
• Tn - time to node, as seen on the align orbital plane MFD
• TOFS - tangential offset docking MFD
• TrA - true anomaly
• TrL - true longitude
• Ts - length of siderial day
• Tth - predicted thrust time, as seen on the align orbital plane MFD
• TVEL - tangential velocity
• UT - universal time, GMT. Not to be confused with UTC (Universial Time Co-ordinated). The latter is based on atomic clocks not astronomy, hence the occasional leap-second to correct UTC to GMT.
• VASI - Visual Approach Slope Indicator, the glideslope lighting system ajacent to runways to guide pilots onto the correct angle of glideslope (normally 3 degrees).
• VC - virtual cockpit
• Vel - velocity
• VOR - very high frequency omnidirectional radio
• VS - vertical speed
• VTOL - Vertical Take Off and Landing
• STOVL - Short take-off, vertical landing. As performed by the DG on full fuel employing hover thrusters during takeoff.
• Wrp - time acceleration factor, seen in the general information display
• XPDR - transponder
• ZM - zoom, as seen on the map MFD