Difference between revisions of "List of Acronyms and Abbreviations"

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This list contains definitions for [[Orbiter]] or important [[spaceflight]] acronyms or abbreviations, especially those appearing in [[MFD|MFDs]] and various [[HUD]] modes.
−
* AgP - [[argument of periapsis]]
+
 
−
* AN - [[ascending node]]
+
One entry in this list consists of a term with one or more definitions, like:
−
* ApA - [[apoapsis]] altitude
+
 
−
* ApD - [[apoapsis]] distance
+
;Term:Definition
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* ApR - [[apoapsis]] radius
+
<pre>
−
* ApT - time to [[apoapsis]]
+
;Term:Definition
−
* Alt - [[altitude]]
+
</pre>
−
* atmo - [[atmosphere]]
+
 
−
* CDI - [[course deviation indicator]]
+
Don't use links in the term part of a entry, please do so in the definition part, for keeping a consistent look-and-feel and don't putting to much emphasis on a single definition.
−
* CDR - commander
+
 
−
* COM - communication or communicator
+
Terms without definitions will get moved to the talk page into the section "Wanted definitions". If you have multiple definitions for a term, the definition part should turn into a numbered list, like:
−
* CTRL - Control
+
;Term:
−
* CVEL - [[closing velocity]]
+
#Definition 1
−
* CVEL - Common Vessel Extensions Light, see [[CVEL]]
+
#Definition 2
−
* DN - [[descending node]]
+
#Definition 3
−
* DG - [[Delta-glider]]
+
 
−
* DG-S [[Delta-glider]] equiped with two [[scramjet|scramjets]].
+
<pre>
−
* DIV - [[divergent]], i.e. [[yaw]] [[gimbal]] mode.
+
;Term:
−
* Dir - direction
+
#Definition 1
−
* Dist - distance
+
#Definition 2
−
* DLng - longitude difference, as seen on the [[synchronise orbit MFD]]
+
#Definition 3
−
* DNP - dynamic [[pressure]]
+
</pre>
−
* DNS - atmospheric density
+
 
−
* DST or Dst - distance (to target)
+
The order of the definitions should be like that:
−
* DTe - time to [[ejection]], as seen on the [[transfer MFD]]
+
#Orbiter HUD definitions
−
* DTi - time to intercept, as seen on the [[transfer MFD]]
+
#Orbiter MFD definitions
−
* DTmin - time of arrical difference, as seen on the [[synchronise orbit MFD]]
+
#General Orbiter definitions
−
* Dv - delta [[velocity]], as seen on the [[transfer MFD]]
+
#Orbiter [[Add-on]] definitions
−
* Ecc - [[eccentricity]]
+
#General spaceflight definitions
−
* ECL - plane of the [[ecliptic]]
+
 
−
* ESA - [[European Space Agency]]
+
If you don't agree to a ordering of definitions, please complain in the [[Talk:List_of_Acronyms_and_Abbreviations|talk]] page about the entry.
−
* ET - [[external tank]]
+
 
−
* EQU - plane of the [[equator]]
+
==See also==
−
* FGB - russian abbreviation for Functional Cargo Block. See [[FGB]]
+
 
−
* FoV - field of view, as seen in the [[general information display]]
+
* [[Russian glossary]]
−
* FPS - [[frame rate]], as seen in the [[general information display]]
+
* [[List of Acronyms and Abbreviations/ISS|List of Acronyms and Abbreviations for the ISS]]
−
* G - an unit of acceleration. 1 G equals the gravity acceleration on earths surface, 9.81 m/s²
+
 
−
* GL - [[Delta-glider]]
+
----
−
* GS - [[ground speed]]
+
{{compactTOC}}
−
* GMT - Greenwich Mean Time. Earth's mean time standard.
+
 
−
* H - Horizon
+
=A=
−
* HUD - [[heads up display]]
+
;ACC: Acceleration, used in [[Surface MFD]] to indicate increasing or decereasing horizontal speed of the ship in m/s<sup>2</sup>
−
* HSI - [[horizontal situation indicator]]
+
;ACT: Activate, command button in [[RCS attitude MFD]] in docking mode to activate the programmed orientation to the target dock
−
* HST - [[Hubble Space Telescope]]
+
;AgP:[[Argument of periapsis]]:The angle in the orbit from the point of the ascending node to the point of periapsis, displayed in [[Orbit MFD]]
−
* HTO - [[hypothetical orbit]], as seen on the [[transfer MFD]]
+
;ALT or Alt:[[altitude]], distance from the body surface
−
* IAS - indicated air speed [http://en.wikipedia.org/wiki/Indicated_air_speed]
+
#Used in [[Orbit MFD]] when Alt mode is selected to indicate distance from the surface of the body
−
* IDS - [[instrument docking system]]
+
#Used in [[Surface MFD]] to indicate altitude in km from the body surface
−
* ILS - [[instrument landing system]]
+
;AN:[[ascending node]]:a vector in an orbit where the body passes from south to north of the plane of reference (i.e. ecliptic or equatorial). Shown in [[Align MFD]] and [[Orbit MFD]] as a dotted vector line connecting to a solid square on the orbit.
−
* Inc - Inclination
+
;AOA: Angle of attack, the difference between the ship's direction of travel and the pitch of its nose
−
* ISP - specific impulse
+
#Used in [[Surface MFD]] to indicate the angle of attack
−
* ISS - [[International Space Station]]
+
;AORP:'''A'''utonomous '''O'''rbiter '''R'''apid '''P'''rototype, a system to allow a [[STS|shuttle]] orbiter to land without [[crew]].
−
* JD - julian date
+
;AP: Used in [[Surface MFD]], a red rectangle with white "AP" in the altitude tape to indicate the altitude of the ship's apoapsis
−
* KISS - "Keep it simple, stupid!" Famous engineering dogma.
+
;ApA:[[apoapsis]] apoapsis altitude, the lowest altitude of an orbit, displayed in [[Orbit MFD]].
−
* KSC - [[Kennedy Space Center]]
+
;ApD:[[apoapsis]] apoapsis distance
−
* LAN - longitude of [[ascending node]] or local-area network
+
;ApR:[[apoapsis]] apoapsis radius, displayed in [[Orbit MFD]]
−
* LDEF - [[Long Duration Exposure Facility]]
+
;ApT:time to [[apoapsis]] in seconds, displayed in [[Orbit MFD]]
−
* LEO - [[Low earth orbit]]
+
;AR:
−
* LPe - longitude of [[periapsis]]
+
#'''A'''utomatic '''R'''eference, used in [[Align MFD]], [[Orbit MFD]] as a command button for Align to select a reference body automatically based on highest gravity
−
* m - metre
+
#'''A'''ltitude '''R'''ange, used to manually set the range in the altitude graph in [[Ascent profile MFD]]
−
* M - Mega (SI prefix). Occasionally mass or [[mach]] number
+
#'''a'''cceptance '''r'''eview
−
* MECO - Main Engine Cutoff
+
;atmo:[[atmosphere]]
−
* [[MFD]] - multifunction display
+
;ATM DATA: Atmospheric data in [[Surface MFD]] readouts
−
* MJD - [[modified julian date]]
+
;ATV:
−
* MMU - Manned Maneuvering Unit
+
#'''A'''utonomous '''T'''ransfer '''V'''ehicle, an unmanned cargo spacecraft, see [[ATV]].
−
* MnA - [[mean anomaly]]
+
#'''A'''utomated '''T'''ransfer '''V'''ehicle[http://www.orbiterwiki.org/wiki/ATV#The_ATV]
−
* MnL - [[mean longitude]]
+
;AU:[[astronomical unit]]
−
* MSx - Mission Specialist x
+
;AX: '''Ax'''is, command button in [[RCS attitude MFD]] to change the selected axis beetween pitch/yaw/roll
−
* m/s - meters per second, the SI base unit of [[velocity]]
+
 
−
* NAV - navigation or [[navigation aid]]
+
[[#top|Back to top]]
−
* OAT - outside air temperature
+
 
−
* Ob - obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
+
=B=
−
* OBS - [[omni bearing selector]]
+
;BAS: Basemode, command button to select programmed attitude (prograde, orbit normal, perpendicular in, radial down) in [[RCS attitude MFD]]
−
* OBT - [[orbit]], as seen on the [[orbit MFD]]
+
;BMW:'''B'''ate, '''M'''ueller, '''W'''hite - authors of ''Fundamentals of Astrodynamics'' (1971)
−
* OMS - orbital maneuvering system, the 'main engines' of the orbital [[space shuttle]]
+
;BRG: '''B'''ea'''r'''in'''g''', used in the [[Horizontal Situation Indicator MFD]] to indicate the compass direction of the ILS or VOR transmitter
−
* OS - [[orbital speed]]
+
 
−
* P - position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
+
[[#top|Back to top]]
−
* p0 - atmospheric pressure at sea level
+
=C=
−
* PAPI - Precision Approach Path Indicators, lit runway centreline.
+
;CaLV:'''Ca'''rgo '''l'''aunch '''v'''ehicle, see [[Ares V]]
−
* PB -
+
;CDI:[[course deviation indicator]]
−
* PeA - [[periapsis]] altitude
+
;CDR:
−
* PeD - [[periapsis]] distance
+
#commander
−
* PeR - [[periapsis]] radius
+
#'''c'''ritical '''d'''esign '''r'''eview
−
* PG - [[prograde]]
+
;CEV:'''C'''rew '''e'''xpedition '''v'''ehicle, see [[CEV]]
−
* PLT - Pilot
+
;CFD:computational fluid dynamics
−
* Pos - position
+
;CFG: command button in [[RCS attitude MFD]] to switch to configuration page
−
* PRJ - [[projection]], as seen on the [[orbit MFD]]
+
;CLV:'''C'''rew '''l'''aunch '''v'''ehicle, see [[Ares I]]
−
* PSx - Payload Specialist x
+
;CNC: Cancel, used in [[RCS attitude MFD]] in the docking mode to cancel the docking mode program
−
* R - mean radius or specific gas constant
+
;COAS:'''C'''rew '''O'''ptical '''A'''lignment '''S'''ight
−
* r0 - atmospheric density at sea level
+
;COM:communication or communicator
−
* Rad - radial distance (not to be confused with angular unit ''radians'')
+
;CRS: '''C'''ou'''rs'''e, indicates the ship's course (heading) in the [[Horizontal Situation Indicator MFD]]
−
* RAnm - [[true anomaly]] of reference axis, as seen on the [[synchronise orbit MFD]]
+
;CTD:[[crash to desktop]]
−
* Rate - rate of change, as seen on the [[align orbital plane MFD]]
+
;CTRL:Control
−
* RCS - [[reaction control system]], spacebourne orientation rocket system.
+
;CTV:
−
* RInc - [[relative inclination]], as seen on the [[align orbital plane MFD]]
+
#'''C'''rew '''T'''ransfer '''V'''ehicle, a manned spacecraft derived from the [[ATV]], see [[CTV]]
−
* RVel - relative [[velocity]]
+
#'''C'''ompatibility '''T'''est '''V'''an, '''NASA'''
−
* RG - [[retrograde]]
+
;CUR: Command button in [[RCS attitude MFD]] to set the programmed attitude to the current attitude
−
* RMS - Remote Manipulator System
+
;CVEL:
−
* SECO - Secondary Engine Cutoff
+
#[[closing velocity]]
−
* Sim - simulation time (in seconds), as seen in the [[general information display]] or a common abbreviation for "simulator"
+
#'''C'''ommon '''V'''essel '''E'''xtensions '''L'''ight, see [[CVEL]]
−
* SHP - [[ship]], as seen on the [[orbit MFD]]
+
 
−
* Sh-ToR - ship [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
+
[[#top|Back to top]]
−
* SLF - shuttle landing facility, see [[Cape Canaveral]]
+
=D=
−
* SMa - [[semi-major axis]]  
+
;D3D9:refers to the advanced graphics client in [[Orbiter]]
−
* SSME - Space Shuttle Main Engines
+
;Da: Deviation, displayed in [[RCS attitude MFD]] to indicate how many degrees the ship has to go in Roll to reach programmed attitude
−
* SMi - [[semi-minor axis]]
+
;DCK: command button in [[RCS attitude MFD]] to set the MFD into Docking mode
−
* SRB - Solid Rocket Booster
+
;DDT&E:'''d'''esign, '''d'''evelopment, '''t'''est and '''e'''valuation
−
* SSTO - [[Single_Stage_To_Orbit | Single Stage to Orbit]]
+
;DEV:'''Dev'''iation, in the [[Horizontal Situation Indicator MFD]], it indicates how far the OBS is adjusted left or right of the radial
−
* STP - static [[pressure]] or [[Stone Temple Pilots]]
+
;DG:[[Delta-glider]]
−
* STS - space transportation system, [[space shuttle]]
+
;DG4:Orbiter's stock '''DG'''
−
* Tgt - target, esp. in [[docking]] mode
+
;DGIII:[[DeltagliderIII]], a famous enhanced version of the [[Delta-glider]].
−
* Tg-ToR - target [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
+
;DGIV:[[DeltaGliderIV]], an improved version of the [[DeltaGliderIII]].
−
* T - orbit period, measured in seconds
+
;DG-S:[[Delta-glider]] equiped with two [[scramjet|scramjets]].
−
* TAS - true air speed [http://en.wikipedia.org/wiki/True_air_speed]
+
;Dir:'''dir'''ection
−
* TKS - russian spacecraft for the Almaz program, see [[TKS]]  
+
;Dist:'''dist'''ance
−
* TLe - eject longitude, as seen on the [[transfer MFD]]
+
#Displayed in [[Sync MFD]], distance ship to target
−
* TLi - intercept longitude, as seen on the [[transfer MFD]]
+
;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
−
* Tn - time to node, as seen on the [[align orbital plane MFD]]
+
;DLng:difference in longitude between ship and target, displayed in [[Sync MFD]]
−
* TOFS - tangential offset [[docking MFD]]
+
;DN:
−
* TrA - [[true anomaly]]
+
#'''Down''', used in [[Map MFD]] when Tracking mode is off and map zoomed in to scroll the map down so you can see farther South
−
* TrL - [[true longitude]]
+
# Command button in [[RCS attitude MFD]] to change the selected modification up so you can edit it
−
* Ts - length of siderial day
+
#[[descending node]]
−
* Tth - predicted thrust time, as seen on the [[align orbital plane MFD]]
+
;DNP:dynamic [[pressure]], given in Pa
−
* TVEL - tangential [[velocity]]
+
#Displayed in [[Surface MFD]] to indicate atmospheric pressure
−
* 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.
+
;DNS:atmospheric density, given in kg m<sup>-3</sup>, symbol ρ
−
* VASI - Visual Approach Slope Indicator, the glideslope lighting system ajacent to runways to guide pilots onto the correct angle of glideslope (normally 3 degrees).
+
#displayed in [[Surface MFD]]
−
* VC - virtual cockpit
+
;DPS:'''D'''ata '''P'''rocessing '''S'''ystem. Term describing the general purpose computers and their interfaces onboard various manned spacecraft
−
* Vel - [[velocity]]
+
;Dr: Deviation, displayed in [[RCS attitude MFD]] to indicate how many degrees until the ship reaches pitch and yaw alignment with the programmed attitude
−
* VOR - [[very high frequency omnidirectional radio]]
+
;DSP: '''D'''i'''sp'''lay, used in [[Map MFD]] to switch between Ground Track Display and Orbital Plane Display
−
* VS - vertical speed
+
;DST or Dst:
−
* VTOL - Vertical Take Off and Landing
+
#Distance (to target), used in the [[Horizontal Situation Indicator MFD]] to indicate distance to the selected ILS or VOR transmitter
−
* STOVL - Short take-off, vertical landing. As performed by the DG on full fuel employing hover thrusters during takeoff.
+
#Distance, used in [[Orbit MFD]] to select between Rad, ApR, PeR (distance from body center) and Alt, ApA, PeA (distance from body surface)
−
* Wrp - time acceleration factor, seen in the [[general information display]]
+
;DTe:time to [[ejection]], as seen on the [[transfer MFD]]
−
* XPDR - [[transponder]]
+
;DTi:time to intercept, as seen on the [[transfer MFD]]
−
* ZM - zoom, as seen on the [[map MFD]]
+
;DTmin:time of arrival difference
 +
#Displayed in [[Sync MFD]] to indicate difference in time between ship and target passing the intersection point
 +
;Dv:delta [[velocity]], as seen on the [[transfer MFD]], see also [[Delta-V]]
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=E=
 +
;Ecc:[[eccentricity]] of orbit, displayed in [[Orbit MFD]]
 +
;ECL:plane of the [[ecliptic]]
 +
;ECLSS:'''E'''nvironmental '''c'''ontrol and '''l'''ife '''s'''upport '''s'''ystem
 +
;ECSS:'''e'''uropean '''c'''ooperation for '''s'''pace '''s'''tandardization
 +
;EELV:Evolved Expendable Launch Vehicle
 +
;ELS: '''EL'''ements, custom '''S'''elect, used in [[Align MFD]] to select a custom orbital elements to which to align
 +
;END: command button in [[RCS attitude MFD]] to stop the programmed attitude mode
 +
;EQU:plane of the [[equator]]
 +
;EQU POS: Equatorial position, given as longitude and latitude
 +
#Displayed in [[Surface MFD]] given as position and rate of change
 +
;ESA:[[European Space Agency]]
 +
;ESAS:[[w:Exploration Systems Architecture Study|Exploration Systems Architecture Study]]
 +
;ET:[[external tank]]
 +
;EVA:'''E'''xtra '''v'''ehicular '''a'''ctivity, see [[EVA]]
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=F=
 +
;FGB:Russian abbreviation for Functional Cargo Block. See [[FGB]]
 +
;FoV:field of view, as seen in the [[general information display]]
 +
;FPS:[[frame rate]] (frames per second), as seen in the [[general information display]]
 +
;FRF:'''F'''light '''R'''eadiness '''F'''iring, a launch countdown test of the Shuttle running all except SRB ignition and lift-off.
 +
;FRM: '''Fr'''a'''m'''e of reference, used in [[Orbit MFD]] to change the orbital display and parameters between Equatorial or Ecliptic
 +
 
 +
[[#top|Back to top]]
 +
=G=
 +
;G or g:
 +
#used in [[Orbit MFD]], indicates what fraction of gravity is exerted on the ship by the reference body (0 to 1)
 +
#unit of acceleration. 1g equals the gravity acceleration on earths surface, 9.81 m/s²
 +
;GET:'''G'''round '''E'''lapsed '''T'''ime [http://history.nasa.gov/SP-4029/Apollo_00c_Introduction.htm]
 +
;GL:Used often as vehicle name prefix for a [[Delta-glider]]
 +
;GLOC:'''G'''ravity-induced '''L'''oss '''o'''f '''C'''onsciousness 
 +
;GMT:Greenwich Mean Time.See [[w:Universal Time|Universal Time on Wikipedia]]
 +
;GO: '''Go''', command button in [[RCS attitude MFD]], once the desired orientation and modifications are set, to activate the program
 +
;GPDS:[[GPDS|Generic Payload Description System]]
 +
;GPS:'''G'''lobal '''P'''ositioning '''S'''ystem
 +
;GS: [[w:Ground speed|Ground speed]]
 +
#Command button in [[Surface MFD]] to set the speed tape to GS
 +
;GTO:[[GTO|'''g'''eostationary '''t'''ransfer '''o'''rbit]]
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=H=
 +
;H:Horizon
 +
;HAC:[[Heading Alignment Cone]]
 +
;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
 +
;HSI:[[horizontal situation indicator]]
 +
;HST:[[Hubble Space Telescope]]
 +
;HTO:[[hypothetical transfer orbit]], as seen on the [[transfer MFD]]
 +
;HUD:[[heads up display]], used in [[Docking MFD]], [[Orbit MFD]], [[Surface MFD]] to copy the current parameters to the HUD
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=I=
 +
;IAS:indicated air speed [[w:Indicated airspeed|Indicated airspeed]]
 +
#Command button in [[Surface MFD]] to set the speed tape to IAS
 +
;IDS:[[IDS|instrument docking system]], used in [[Docking MFD]]
 +
;ILS:
 +
#[[instrument landing system]]
 +
#also used in [[Horizontal Situation Indicator MFD]] to indicate which runway at which Spaceport is selected by the NAV system
 +
#'''I'''nternational '''l'''aunch '''s'''ervices, a US-russian joint venture marketing [[Atlas]] and [[Proton]] launches
 +
;Inc: [[Inclination]], angular difference between one orbit with respect to another, usually the ecliptic, equatorial, body orbit, or target orbit, displayed in [[Align MFD]], [[Orbit MFD]]
 +
;INV: Inverse, command button in [[RCS attitude MFD]] to change the programmed attitude to the inverse (retrograde, orbit antinormal, perpendicular out, radial up)
 +
;ISP:[[specific impulse]]
 +
;ISS:[[International Space Station]]
 +
 
 +
[[#top|Back to top]]
 +
=J=
 +
;JD:[[Julian date]]
 +
;JSC:  Lyndon B. '''J'''ohnson '''S'''pace '''C'''enter
 +
;JWST:'''J'''ames '''W'''ebb '''S'''pace '''T'''elescope
 +
 
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=K=
 +
;KISS:"Keep it simple, stupid!" Famous engineering dogma.[http://en.wikipedia.org/wiki/KISS_principle]
 +
;KSC:[[Kennedy Space Center]]
 +
 
 +
[[#top|Back to top]]
 +
=L=
 +
;LAN:
 +
#Longitude of the [[ascending node]], used in [[Align MFD]], [[Orbit MFD]]
 +
#local-area network
 +
;LCC:
 +
#'''l'''aunch '''c'''ontrol '''c'''enter
 +
#'''l'''ife '''c'''ycle '''c'''ost
 +
;LDEF:[[Long Duration Exposure Facility]]
 +
;LEN: List Length
 +
#Command button in [[Sync MFD]] to select number of orbits to display (lines 0-18)
 +
;LEO:[[Low earth orbit]]
 +
;LH2:Liquid Hydrogen
 +
;LOCV: Loss of crew and vehicle
 +
;LOX:Liquid Oxygen
 +
;LPe:longitude of [[periapsis]], displayed in [[Orbit MFD]]
 +
;L/R:'''L'''eft/'''R'''ight, used in [[Horizontal Situation Indicator MFD]] to switch MFD mode focus to the left or right graphic display
 +
 
 +
[[#top|Back to top]]
 +
=M=
 +
;m:metre
 +
;M:
 +
#Mega (SI prefix for 10<sup>6</sup>).
 +
#Mass, given in kg
 +
#[[mach]] number or multiples of speed of sound in a given medium
 +
##Used in [[Surface MFD]] ship's speed is given in mach number as well as m/s
 +
;MCC:
 +
#'''m'''id '''c'''ourse '''c'''orrection
 +
#'''m'''ission '''c'''ontrol '''center'''
 +
;MCC-H:'''m'''ission '''c'''ontrol '''c'''enter '''H'''ouston
 +
;MCC-M:'''m'''ission '''c'''ontrol '''c'''enter '''M'''oscow
 +
;MDR:'''m'''ission '''d'''efinition '''r'''eview
 +
;MECO:'''m'''ain '''e'''ngine '''c'''ut'''o'''ff
 +
;MET:'''M'''ission '''E'''lapsed '''T'''ime. See [[w:Mission Elapsed Time|Mission Elapsed Time on Wikipedia]].
 +
;MFD:'''M'''ulti'''f'''unctional '''D'''isplay, see [[MFD]]
 +
;MHz: '''M'''ega'''H'''er'''z''', same as the old term megacycles/second, radio and transponder frequency, used in [[COMNAV MFD]]
 +
;MJD:[[modified Julian date]]
 +
;MLP:[[Mobile Launcher Platform]]
 +
;MMOD:'''M'''icro'''m'''eteorites and '''o'''rbital '''d'''ebris
 +
;MMU:'''m'''anned '''m'''aneuvering '''u'''nit, see [[MMU]]
 +
;MnA:[[mean anomaly]], displayed in [[Orbit MFD]]
 +
;MnL:[[mean longitude]], displayed in [[Orbit MFD]]
 +
;MOD: used in [[Orbit MFD]] and [[Sync MFD]] to cycle the display between parameters only, orbital display only, or both
 +
;m/s:meters per second, the SI base unit of [[velocity]]
 +
;MSx:Mission Specialist x
 +
 
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=N=
 +
;NAV:
 +
#Navigatonal receiver,
 +
##in [[COMNAV MFD]] it is used to identify up to four receivers in the stack
 +
##in [[Horizontal Situation Indicator MFD]], it is used to select which receiver an HSI display is tuned to
 +
##in [[RCS attitude MFD]] command button in Docking mode to slave one of the Nav receivers to this MFD
 +
#navigation
 +
#[[navigation aid]]
 +
;NT: '''N'''o '''t'''arget, used in [[Orbit MFD]] to deselect the target
 +
 
 +
[[#top|Back to top]]
 +
=O=
 +
;OAT:outside air temperature, displayed in [[Surface MFD]] given in Kelvins (K)
 +
;Ob:
 +
#Obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
 +
#Orbit, displayed in [[Sync MFD]] indicates how many orbits remaining until rendezvous
 +
;OB+ and OB-: '''O'''mni'''B'''earing, used to change the offset of the course arrow to left or right of the beam
 +
;OBS:[[omni bearing selector]]
 +
;OBT:[[orbit]], as seen on the [[orbit MFD]]
 +
;OMBUU: '''O'''rbiter '''M'''id'''b'''ody '''U'''mbilical '''U'''nit
 +
;[[OMP]]:'''O'''rbiter '''M'''ultiplayer '''P'''roject, an ongoing program to create a multiplayer server in Orbiter.
 +
;OMS:'''O'''rbital '''M'''aneuvering '''S'''ystem, the 'main engines' of the [[space shuttle]] orbiter
 +
;OS:[[w:Orbital speed|Orbital speed]]
 +
#Command button in [[Surface MFD]] to set the speed tape to OS
 +
 
 +
[[#top|Back to top]]
 +
=P=
 +
;P:position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
 +
;p0:atmospheric pressure at sea level
 +
;PAM:'''P'''ayload '''A'''ssist '''M'''odule, a family of solid upper stages for the [[Space Shuttle]]
 +
;PAPI:'''P'''recision '''A'''pproach '''P'''ath '''I'''ndicators, lit runway centerline.
 +
;PB:[[Shuttle PB]]
 +
;PDR:'''p'''reliminary '''d'''esign '''r'''eview
 +
;PDRS:'''P'''ayload '''D'''eployment and '''R'''etrieval '''S'''ystem, the official name of the robot arm of the Space Shuttle
 +
;PeA:[[periapsis]] altitude. Altitude of periapsis above the surface of the orbited body, used in [[Orbit MFD]]
 +
;PeD:[[periapsis]] distance. See PeR.
 +
;PeR:[[periapsis]] radius. Distance of periapsis from the center of the orbited body, used in [[Orbit MFD]]
 +
;PeT:time to [[periapsis]] in seconds, displayed in [[Orbit MFD]]
 +
;PG:
 +
#Page, switching displayed pages in an MFD mode, used in [[Align MFD]] and [[Ascent profile MFD]]
 +
#[[prograde]]
 +
;PLT:Pilot
 +
;PMI:'''P'''rincipal '''m'''oments of '''i'''nertia, see [[PMI]]
 +
;Pos:position
 +
;PRJ: Projection, used in the [[Orbit MFD]] to switch orbital display between Ecliptic, Equatorial, Ship's orbit, Target orbit
 +
;PRR:'''p'''reliminary '''r'''equirements '''r'''eview
 +
;PSx:Payload Specialist x
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=Q=
 +
;QR: '''q'''ualification '''r'''eview
 +
 
 +
[[#top|Back to top]]
 +
=R=
 +
;R:
 +
#mean radius
 +
#specific gas constant
 +
;+R and -R:
 +
#Command buttons in [[RCS attitude MFD]] (R+) to add a line (pitch, yaw, roll) to the programmed attitude, or R- to remove the last line
 +
#Command buttons in [[Sync MFD]] to rotate intersection points
 +
;r0:atmospheric density at sea level
 +
;Rad:
 +
#Displayed in [[Orbit MFD]] when Radius mode is selected to indicate distance from the center of the body in meters
 +
#radial distance
 +
#angular unit ''radians''
 +
;RAnm:[[true anomaly]] of reference axis, displayed in [[synchronise orbit MFD]]
 +
;Rate: How fast the current orbital plane is changing, degrees per second, used in [[Align MFD]]
 +
;RCS:[[reaction control system]], spacebourne orientation rocket system.
 +
;R&D:'''r'''esearch and '''d'''evelopment
 +
;RDT&E:'''r'''esearch, '''d'''evelopment, '''t'''esting and '''e'''valuation
 +
;REF: '''Reference'''
 +
#used in [[Align MFD]], [[Map MFD]], [[Orbit MFD]] to select a reference body.
 +
#'''Ref''': Reference displayed in [[Sync MFD]] to switch Reference axis
 +
;RG:[[retrograde]]
 +
;RInc:[[relative inclination]], relative inclination between the ship and target orbits, used in [[Align MFD]] and [[Sync MFD]]
 +
;RKA:Russian Space Agency
 +
;RMS:'''R'''emote '''M'''anipulator '''S'''ystem
 +
;RS:Russian-side, used as prefix for orientation when describing ISS components.
 +
;RSLS:'''R'''edundant '''s'''et '''l'''aunch '''s'''equencer, the computer systems responsible for the ignition of the SSMEs in the [[Space Shuttle]] orbiter.
 +
;RTFM:'''R'''ead '''t'''he '''f'''ine (or many other '''f'''-words) '''m'''anual, a typical forum answer for questions already answered extensivly in the manual.
 +
;RTLS:'''R'''eturn '''t'''o '''l'''aunch '''s'''ite, a [[Space Shuttle]] abort mode.
 +
;RTN: Return, command button in [[RCS attitude MFD]] to return the display to the Active mode page
 +
;RVel:relative [[velocity]]
 +
#Displayed in [[Sync MFD]], Relative speed between ship and target
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=S=
 +
;SAR:
 +
#'''S'''earch '''a'''nd '''r'''escue.
 +
#'''S'''yntetic '''a'''perture '''r'''adar, a [[radar]] mode used for creating navigation maps or detect slowly moving ground vehicles.
 +
;S/C: [[spacecraft|'''s'''pace'''c'''raft]]
 +
;SC< and SC>:'''SC'''an frequency up or down in the currently selected receiver, used in [[COMNAV MFD]]
 +
;SDK:Software Development Kit [http://en.wikipedia.org/wiki/SDK]
 +
;SDHLV:'''S'''huttle '''D'''erived '''H'''eavy '''L'''aunch '''V'''ehicle, see [[Ares V]]
 +
;SDLV:'''S'''huttle '''D'''erived '''L'''aunch '''V'''ehicle, see [[Ares]]
 +
;SECO:
 +
#'''S'''econdary '''E'''ngine '''C'''ut'''o'''ff
 +
#'''S'''ustainer '''E'''ngine '''C'''ut'''o'''ff
 +
;SET: Set, used in [[RCS attitude MFD]] to set the desired attitude
 +
;SHP: Ship, used in [[Map MFD]] to indicate your ship's name, position, altitude, course of your ship
 +
;Sim:
 +
#simulation time (in seconds), as seen in the [[general information display]]
 +
#a common abbreviation for "simulator"
 +
;Sh-ToR:ship [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
 +
;SI unit: The metric system of measurement, the modern name, see [[SI unit]]
 +
;SL+ and SL-: '''S'''e'''l'''ect, change which receiver to next or previous receiver to adjust frequency, used in [[COMNAV MFD]]
 +
;SLF:shuttle landing facility, see [[Cape Canaveral]]
 +
;SMa: [[semi-major axis]], used in [[Orbit MFD]]
 +
;SMi:[[semi-minor axis]], used in [[Orbit MFD]]
 +
;SRB:'''S'''olid '''R'''ocket '''B'''ooster [http://en.wikipedia.org/wiki/Solid_rocket_booster]
 +
;SRTM:'''S'''huttle '''r'''adar '''t'''opography '''m'''ission, see [[SRTM]].
 +
;SSME:Space Shuttle Main Engines [http://en.wikipedia.org/wiki/SSME_%28rocket_engine%29]
 +
;SSTO:[[Single_Stage_To_Orbit | Single Stage to Orbit]]
 +
;STOVL:Short take-off, vertical landing. As performed by the DG on full fuel employing hover thrusters during takeoff.
 +
;STP:static [[pressure]], given in Pa
 +
#Displayed in [[Surface MFD]] to indicate atmospheric pressure
 +
;STS:'''s'''pace '''t'''ransportation '''s'''ystem, AKA space shuttle, see [[space transportation system]]
 +
;SUS: command button in [[RCS attitude MFD]] to suspend programmed attitude temporarily
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=T=
 +
 
 +
;T:orbit period, measured in seconds, displayed in [[Orbit MFD]]
 +
;TAEM:Terminal Area Energy Management
 +
;TAS:true air speed [[w:True airspeed|True airspeed]]
 +
#Command button in [[Surface MFD]] to set the speed tape to TAS
 +
;TEI:'''T'''rans '''E'''arth '''I'''njection[http://en.wikipedia.org/wiki/Trans_Earth_Injection]
 +
;TGT:'''T'''ar'''G'''e'''T'''
 +
#command button used in [[Align MFD]], [[Docking MFD]], [[Map MFD]], [[Orbit MFD]], and [[Sync MFD]] to select a target
 +
#used in the [[Map MFD]] display to indicate target name, position, altitude of the target
 +
;Tg-ToR:target [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
 +
;TKS:russian spacecraft for the Almaz program, see [[TKS]]
 +
;TLA:Three letter acronym for a '''t'''hree '''l'''etter '''a'''cronym.
 +
;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:'''T'''ime to '''n'''ode, used in [[Align MFD]]
 +
;TOFS:tangential offset [[docking MFD]]
 +
;ToR: time on reference axis, displayed in [[Sync MFD]] to indicate number of seconds until ship or target passes the intersection point
 +
;TrA:[[true anomaly]], displayed in [[Orbit MFD]]
 +
;TRK:Track, used in [[map MFD]] to keep the ship centered in the map display
 +
;TrL:[[true longitude]], displayed in [[Orbit MFD]]
 +
;TRL:'''t'''echnology '''r'''eadiness '''l'''evel
 +
;Ts:length of siderial day
 +
;TthA: Estimated thrust time at the ascending node to align planes, used in [[Align MFD]]
 +
;TthD: Estimated thrust time at the descending node to align planes, used in [[Align MFD]]
 +
;TVEL:tangential [[velocity]]
 +
 
 +
[[#top|Back to top]]
 +
 
 +
=U=
 +
;UMMU:'''U'''niversal '''m'''anned '''m'''aneuvering '''u'''nit, popular add-on, see [[Universal MMU]].
 +
;UNKS:unknown problems, you are aware of.
 +
;UNK-UNKS:unknown problems, you are not aware of.
 +
;UP:
 +
#'''UP''', used in [[Map MFD]] when Track mode is off and map is zoomed in to scroll the map up to see farther North
 +
#Command button in [[RCS attitude MFD]] to change the selected modification up so you can edit it
 +
;UT:'''u'''niversal '''t'''ime, 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.
 +
 
 +
[[#top|Back to top]]
 +
=V=
 +
;+V and -V: Used in [[RCS attitude MFD]] to add or subtract one degree each click the programmed attitude mode
 +
;VACC: Vertical acceleration, used in [[Surface MFD]] how fast rate of ascent or descent is increasing or decreasing in m/s<sup>2</sup>
 +
;VASI:'''V'''isual '''A'''pproach '''S'''lope '''I'''ndicator, the glideslope lighting system ajacent to runways to guide pilots onto the correct angle of glideslope (normally 3 degrees).
 +
;VC:
 +
#virtual cockpit
 +
#Visual C++, an IDE and C++ compiler by Microsoft.
 +
;Vel:[[velocity]], displayed in [[Orbit MFD]]
 +
;VOR:
 +
#[[very high frequency omnidirectional radio]]
 +
# used in the [[Horizontal Situation Indicator MFD]] to indicate which VOR transmitter is selected by a NAV radio, if it's selected to a VOR transmitter
 +
;VRR: '''V'''elocity '''R'''adial '''R'''ange, used to manually set the range in the Radial Velocity graph in [[Ascent profile MFD]]
 +
;VS:vertical speed
 +
#Used in [[Surface MFD]] to indicate rate of ascent or descent in meters per second
 +
;VSA: [[Virtual Space Agency]]
 +
;VSI: Vertical Speed Indicator, used in [[Surface MFD]], the VS tape reading rate of ascent or descent, in m/s
 +
;VTOL:'''V'''ertical '''T'''ake '''O'''ff and '''L'''anding
 +
;VTR: '''V'''elocity '''T'''angential '''R'''ange, used to manually set the range in the Tangential Velocity Range graph in [[Ascent profile MFD]]
 +
 
 +
[[#top|Back to top]]
 +
=W=
 +
;WBS:'''w'''ork '''b'''reakdown '''s'''tructure
 +
;WPD:'''w'''ork '''p'''ackage '''d'''escription
 +
;Wrp:time acceleration factor, seen in the [[general information display]]
 +
=X=
 +
;XPDR:[[transponder]], used in [[Docking MFD]]
 +
=Y=
 +
;YSC:Yokohama Science Center
 +
=Z=
 +
;ZM+ and ZM-: zoom,used in [[Map MFD]] to zoom the map display in and out
 +
 
 +
[[#top|Back to top]]
 +
 
 +
{{compactTOC}}
 +
 
 +
[[Category: Articles]]
 +
[[Category:Glossary]]

Latest revision as of 04:49, 22 December 2024

This list contains definitions for Orbiter or important spaceflight acronyms or abbreviations, especially those appearing in MFDs and various HUD modes.

One entry in this list consists of a term with one or more definitions, like:

Term
Definition
;Term:Definition

Don't use links in the term part of a entry, please do so in the definition part, for keeping a consistent look-and-feel and don't putting to much emphasis on a single definition.

Terms without definitions will get moved to the talk page into the section "Wanted definitions". If you have multiple definitions for a term, the definition part should turn into a numbered list, like:

Term
  1. Definition 1
  2. Definition 2
  3. Definition 3
;Term:
#Definition 1
#Definition 2
#Definition 3

The order of the definitions should be like that:

  1. Orbiter HUD definitions
  2. Orbiter MFD definitions
  3. General Orbiter definitions
  4. Orbiter Add-on definitions
  5. General spaceflight definitions

If you don't agree to a ordering of definitions, please complain in the talk page about the entry.

See also[edit]

Contents: Top - 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


A[edit]

ACC
Acceleration, used in Surface MFD to indicate increasing or decereasing horizontal speed of the ship in m/s2
ACT
Activate, command button in RCS attitude MFD in docking mode to activate the programmed orientation to the target dock
AgP
Argument of periapsis:The angle in the orbit from the point of the ascending node to the point of periapsis, displayed in Orbit MFD
ALT or Alt
altitude, distance from the body surface
  1. Used in Orbit MFD when Alt mode is selected to indicate distance from the surface of the body
  2. Used in Surface MFD to indicate altitude in km from the body surface
AN
ascending node:a vector in an orbit where the body passes from south to north of the plane of reference (i.e. ecliptic or equatorial). Shown in Align MFD and Orbit MFD as a dotted vector line connecting to a solid square on the orbit.
AOA
Angle of attack, the difference between the ship's direction of travel and the pitch of its nose
  1. Used in Surface MFD to indicate the angle of attack
AORP
Autonomous Orbiter Rapid Prototype, a system to allow a shuttle orbiter to land without crew.
AP
Used in Surface MFD, a red rectangle with white "AP" in the altitude tape to indicate the altitude of the ship's apoapsis
ApA
apoapsis apoapsis altitude, the lowest altitude of an orbit, displayed in Orbit MFD.
ApD
apoapsis apoapsis distance
ApR
apoapsis apoapsis radius, displayed in Orbit MFD
ApT
time to apoapsis in seconds, displayed in Orbit MFD
AR
  1. Automatic Reference, used in Align MFD, Orbit MFD as a command button for Align to select a reference body automatically based on highest gravity
  2. Altitude Range, used to manually set the range in the altitude graph in Ascent profile MFD
  3. acceptance review
atmo
atmosphere
ATM DATA
Atmospheric data in Surface MFD readouts
ATV
  1. Autonomous Transfer Vehicle, an unmanned cargo spacecraft, see ATV.
  2. Automated Transfer Vehicle[1]
AU
astronomical unit
AX
Axis, command button in RCS attitude MFD to change the selected axis beetween pitch/yaw/roll

Back to top

B[edit]

BAS
Basemode, command button to select programmed attitude (prograde, orbit normal, perpendicular in, radial down) in RCS attitude MFD
BMW
Bate, Mueller, White - authors of Fundamentals of Astrodynamics (1971)
BRG
Bearing, used in the Horizontal Situation Indicator MFD to indicate the compass direction of the ILS or VOR transmitter

Back to top

C[edit]

CaLV
Cargo launch vehicle, see Ares V
CDI
course deviation indicator
CDR
  1. commander
  2. critical design review
CEV
Crew expedition vehicle, see CEV
CFD
computational fluid dynamics
CFG
command button in RCS attitude MFD to switch to configuration page
CLV
Crew launch vehicle, see Ares I
CNC
Cancel, used in RCS attitude MFD in the docking mode to cancel the docking mode program
COAS
Crew Optical Alignment Sight
COM
communication or communicator
CRS
Course, indicates the ship's course (heading) in the Horizontal Situation Indicator MFD
CTD
crash to desktop
CTRL
Control
CTV
  1. Crew Transfer Vehicle, a manned spacecraft derived from the ATV, see CTV
  2. Compatibility Test Van, NASA
CUR
Command button in RCS attitude MFD to set the programmed attitude to the current attitude
CVEL
  1. closing velocity
  2. Common Vessel Extensions Light, see CVEL

Back to top

D[edit]

D3D9
refers to the advanced graphics client in Orbiter
Da
Deviation, displayed in RCS attitude MFD to indicate how many degrees the ship has to go in Roll to reach programmed attitude
DCK
command button in RCS attitude MFD to set the MFD into Docking mode
DDT&E
design, development, test and evaluation
DEV
Deviation, in the Horizontal Situation Indicator MFD, it indicates how far the OBS is adjusted left or right of the radial
DG
Delta-glider
DG4
Orbiter's stock DG
DGIII
DeltagliderIII, a famous enhanced version of the Delta-glider.
DGIV
DeltaGliderIV, an improved version of the DeltaGliderIII.
DG-S
Delta-glider equiped with two scramjets.
Dir
direction
Dist
distance
  1. Displayed in Sync MFD, distance ship to target
DIV
divergent, i.e. yaw gimbal mode.
DLng
difference in longitude between ship and target, displayed in Sync MFD
DN
  1. Down, used in Map MFD when Tracking mode is off and map zoomed in to scroll the map down so you can see farther South
  2. Command button in RCS attitude MFD to change the selected modification up so you can edit it
  3. descending node
DNP
dynamic pressure, given in Pa
  1. Displayed in Surface MFD to indicate atmospheric pressure
DNS
atmospheric density, given in kg m-3, symbol ρ
  1. displayed in Surface MFD
DPS
Data Processing System. Term describing the general purpose computers and their interfaces onboard various manned spacecraft
Dr
Deviation, displayed in RCS attitude MFD to indicate how many degrees until the ship reaches pitch and yaw alignment with the programmed attitude
DSP
Display, used in Map MFD to switch between Ground Track Display and Orbital Plane Display
DST or Dst
  1. Distance (to target), used in the Horizontal Situation Indicator MFD to indicate distance to the selected ILS or VOR transmitter
  2. Distance, used in Orbit MFD to select between Rad, ApR, PeR (distance from body center) and Alt, ApA, PeA (distance from body surface)
DTe
time to ejection, as seen on the transfer MFD
DTi
time to intercept, as seen on the transfer MFD
DTmin
time of arrival difference
  1. Displayed in Sync MFD to indicate difference in time between ship and target passing the intersection point
Dv
delta velocity, as seen on the transfer MFD, see also Delta-V

Back to top

E[edit]

Ecc
eccentricity of orbit, displayed in Orbit MFD
ECL
plane of the ecliptic
ECLSS
Environmental control and life support system
ECSS
european cooperation for space standardization
EELV
Evolved Expendable Launch Vehicle
ELS
ELements, custom Select, used in Align MFD to select a custom orbital elements to which to align
END
command button in RCS attitude MFD to stop the programmed attitude mode
EQU
plane of the equator
EQU POS
Equatorial position, given as longitude and latitude
  1. Displayed in Surface MFD given as position and rate of change
ESA
European Space Agency
ESAS
Exploration Systems Architecture Study
ET
external tank
EVA
Extra vehicular activity, see EVA

Back to top

F[edit]

FGB
Russian abbreviation for Functional Cargo Block. See FGB
FoV
field of view, as seen in the general information display
FPS
frame rate (frames per second), as seen in the general information display
FRF
Flight Readiness Firing, a launch countdown test of the Shuttle running all except SRB ignition and lift-off.
FRM
Frame of reference, used in Orbit MFD to change the orbital display and parameters between Equatorial or Ecliptic

Back to top

G[edit]

G or g
  1. used in Orbit MFD, indicates what fraction of gravity is exerted on the ship by the reference body (0 to 1)
  2. unit of acceleration. 1g equals the gravity acceleration on earths surface, 9.81 m/s²
GET
Ground Elapsed Time [2]
GL
Used often as vehicle name prefix for a Delta-glider
GLOC
Gravity-induced Loss of Consciousness
GMT
Greenwich Mean Time.See Universal Time on Wikipedia
GO
Go, command button in RCS attitude MFD, once the desired orientation and modifications are set, to activate the program
GPDS
Generic Payload Description System
GPS
Global Positioning System
GS
Ground speed
  1. Command button in Surface MFD to set the speed tape to GS
GTO
geostationary transfer orbit

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H[edit]

H
Horizon
HAC
Heading Alignment Cone
HLLV
heavy lift launch vehicle
HSI
horizontal situation indicator
HST
Hubble Space Telescope
HTO
hypothetical transfer orbit, as seen on the transfer MFD
HUD
heads up display, used in Docking MFD, Orbit MFD, Surface MFD to copy the current parameters to the HUD

Back to top

I[edit]

IAS
indicated air speed Indicated airspeed
  1. Command button in Surface MFD to set the speed tape to IAS
IDS
instrument docking system, used in Docking MFD
ILS
  1. instrument landing system
  2. also used in Horizontal Situation Indicator MFD to indicate which runway at which Spaceport is selected by the NAV system
  3. International launch services, a US-russian joint venture marketing Atlas and Proton launches
Inc
Inclination, angular difference between one orbit with respect to another, usually the ecliptic, equatorial, body orbit, or target orbit, displayed in Align MFD, Orbit MFD
INV
Inverse, command button in RCS attitude MFD to change the programmed attitude to the inverse (retrograde, orbit antinormal, perpendicular out, radial up)
ISP
specific impulse
ISS
International Space Station

Back to top

J[edit]

JD
Julian date
JSC
Lyndon B. Johnson Space Center
JWST
James Webb Space Telescope


Back to top

K[edit]

KISS
"Keep it simple, stupid!" Famous engineering dogma.[3]
KSC
Kennedy Space Center

Back to top

L[edit]

LAN
  1. Longitude of the ascending node, used in Align MFD, Orbit MFD
  2. local-area network
LCC
  1. launch control center
  2. life cycle cost
LDEF
Long Duration Exposure Facility
LEN
List Length
  1. Command button in Sync MFD to select number of orbits to display (lines 0-18)
LEO
Low earth orbit
LH2
Liquid Hydrogen
LOCV
Loss of crew and vehicle
LOX
Liquid Oxygen
LPe
longitude of periapsis, displayed in Orbit MFD
L/R
Left/Right, used in Horizontal Situation Indicator MFD to switch MFD mode focus to the left or right graphic display

Back to top

M[edit]

m
metre
M
  1. Mega (SI prefix for 106).
  2. Mass, given in kg
  3. mach number or multiples of speed of sound in a given medium
    1. Used in Surface MFD ship's speed is given in mach number as well as m/s
MCC
  1. mid course correction
  2. mission control center
MCC-H
mission control center Houston
MCC-M
mission control center Moscow
MDR
mission definition review
MECO
main engine cutoff
MET
Mission Elapsed Time. See Mission Elapsed Time on Wikipedia.
MFD
Multifunctional Display, see MFD
MHz
MegaHerz, same as the old term megacycles/second, radio and transponder frequency, used in COMNAV MFD
MJD
modified Julian date
MLP
Mobile Launcher Platform
MMOD
Micrometeorites and orbital debris
MMU
manned maneuvering unit, see MMU
MnA
mean anomaly, displayed in Orbit MFD
MnL
mean longitude, displayed in Orbit MFD
MOD
used in Orbit MFD and Sync MFD to cycle the display between parameters only, orbital display only, or both
m/s
meters per second, the SI base unit of velocity
MSx
Mission Specialist x


Back to top

N[edit]

NAV
  1. Navigatonal receiver,
    1. in COMNAV MFD it is used to identify up to four receivers in the stack
    2. in Horizontal Situation Indicator MFD, it is used to select which receiver an HSI display is tuned to
    3. in RCS attitude MFD command button in Docking mode to slave one of the Nav receivers to this MFD
  2. navigation
  3. navigation aid
NT
No target, used in Orbit MFD to deselect the target

Back to top

O[edit]

OAT
outside air temperature, displayed in Surface MFD given in Kelvins (K)
Ob
  1. Obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
  2. Orbit, displayed in Sync MFD indicates how many orbits remaining until rendezvous
OB+ and OB-
OmniBearing, used to change the offset of the course arrow to left or right of the beam
OBS
omni bearing selector
OBT
orbit, as seen on the orbit MFD
OMBUU
Orbiter Midbody Umbilical Unit
OMP
Orbiter Multiplayer Project, an ongoing program to create a multiplayer server in Orbiter.
OMS
Orbital Maneuvering System, the 'main engines' of the space shuttle orbiter
OS
Orbital speed
  1. Command button in Surface MFD to set the speed tape to OS

Back to top

P[edit]

P
position (sometimes radius) vector, as seen on the align orbital plane MFD
p0
atmospheric pressure at sea level
PAM
Payload Assist Module, a family of solid upper stages for the Space Shuttle
PAPI
Precision Approach Path Indicators, lit runway centerline.
PB
Shuttle PB
PDR
preliminary design review
PDRS
Payload Deployment and Retrieval System, the official name of the robot arm of the Space Shuttle
PeA
periapsis altitude. Altitude of periapsis above the surface of the orbited body, used in Orbit MFD
PeD
periapsis distance. See PeR.
PeR
periapsis radius. Distance of periapsis from the center of the orbited body, used in Orbit MFD
PeT
time to periapsis in seconds, displayed in Orbit MFD
PG
  1. Page, switching displayed pages in an MFD mode, used in Align MFD and Ascent profile MFD
  2. prograde
PLT
Pilot
PMI
Principal moments of inertia, see PMI
Pos
position
PRJ
Projection, used in the Orbit MFD to switch orbital display between Ecliptic, Equatorial, Ship's orbit, Target orbit
PRR
preliminary requirements review
PSx
Payload Specialist x

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Q[edit]

QR
qualification review

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R[edit]

R
  1. mean radius
  2. specific gas constant
+R and -R
  1. Command buttons in RCS attitude MFD (R+) to add a line (pitch, yaw, roll) to the programmed attitude, or R- to remove the last line
  2. Command buttons in Sync MFD to rotate intersection points
r0
atmospheric density at sea level
Rad
  1. Displayed in Orbit MFD when Radius mode is selected to indicate distance from the center of the body in meters
  2. radial distance
  3. angular unit radians
RAnm
true anomaly of reference axis, displayed in synchronise orbit MFD
Rate
How fast the current orbital plane is changing, degrees per second, used in Align MFD
RCS
reaction control system, spacebourne orientation rocket system.
R&D
research and development
RDT&E
research, development, testing and evaluation
REF
Reference
  1. used in Align MFD, Map MFD, Orbit MFD to select a reference body.
  2. Ref: Reference displayed in Sync MFD to switch Reference axis
RG
retrograde
RInc
relative inclination, relative inclination between the ship and target orbits, used in Align MFD and Sync MFD
RKA
Russian Space Agency
RMS
Remote Manipulator System
RS
Russian-side, used as prefix for orientation when describing ISS components.
RSLS
Redundant set launch sequencer, the computer systems responsible for the ignition of the SSMEs in the Space Shuttle orbiter.
RTFM
Read the fine (or many other f-words) manual, a typical forum answer for questions already answered extensivly in the manual.
RTLS
Return to launch site, a Space Shuttle abort mode.
RTN
Return, command button in RCS attitude MFD to return the display to the Active mode page
RVel
relative velocity
  1. Displayed in Sync MFD, Relative speed between ship and target

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S[edit]

SAR
  1. Search and rescue.
  2. Syntetic aperture radar, a radar mode used for creating navigation maps or detect slowly moving ground vehicles.
S/C
spacecraft
SC< and SC>
SCan frequency up or down in the currently selected receiver, used in COMNAV MFD
SDK
Software Development Kit [4]
SDHLV
Shuttle Derived Heavy Launch Vehicle, see Ares V
SDLV
Shuttle Derived Launch Vehicle, see Ares
SECO
  1. Secondary Engine Cutoff
  2. Sustainer Engine Cutoff
SET
Set, used in RCS attitude MFD to set the desired attitude
SHP
Ship, used in Map MFD to indicate your ship's name, position, altitude, course of your ship
Sim
  1. simulation time (in seconds), as seen in the general information display
  2. a common abbreviation for "simulator"
Sh-ToR
ship time-on-reference, as seen on the synchronise orbit MFD
SI unit
The metric system of measurement, the modern name, see SI unit
SL+ and SL-
Select, change which receiver to next or previous receiver to adjust frequency, used in COMNAV MFD
SLF
shuttle landing facility, see Cape Canaveral
SMa
semi-major axis, used in Orbit MFD
SMi
semi-minor axis, used in Orbit MFD
SRB
Solid Rocket Booster [5]
SRTM
Shuttle radar topography mission, see SRTM.
SSME
Space Shuttle Main Engines [6]
SSTO
Single Stage to Orbit
STOVL
Short take-off, vertical landing. As performed by the DG on full fuel employing hover thrusters during takeoff.
STP
static pressure, given in Pa
  1. Displayed in Surface MFD to indicate atmospheric pressure
STS
space transportation system, AKA space shuttle, see space transportation system
SUS
command button in RCS attitude MFD to suspend programmed attitude temporarily

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T[edit]

T
orbit period, measured in seconds, displayed in Orbit MFD
TAEM
Terminal Area Energy Management
TAS
true air speed True airspeed
  1. Command button in Surface MFD to set the speed tape to TAS
TEI
Trans Earth Injection[7]
TGT
TarGeT
  1. command button used in Align MFD, Docking MFD, Map MFD, Orbit MFD, and Sync MFD to select a target
  2. used in the Map MFD display to indicate target name, position, altitude of the target
Tg-ToR
target time-on-reference, as seen on the synchronise orbit MFD
TKS
russian spacecraft for the Almaz program, see TKS
TLA
Three letter acronym for a three letter acronym.
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, used in Align MFD
TOFS
tangential offset docking MFD
ToR
time on reference axis, displayed in Sync MFD to indicate number of seconds until ship or target passes the intersection point
TrA
true anomaly, displayed in Orbit MFD
TRK
Track, used in map MFD to keep the ship centered in the map display
TrL
true longitude, displayed in Orbit MFD
TRL
technology readiness level
Ts
length of siderial day
TthA
Estimated thrust time at the ascending node to align planes, used in Align MFD
TthD
Estimated thrust time at the descending node to align planes, used in Align MFD
TVEL
tangential velocity

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U[edit]

UMMU
Universal manned maneuvering unit, popular add-on, see Universal MMU.
UNKS
unknown problems, you are aware of.
UNK-UNKS
unknown problems, you are not aware of.
UP
  1. UP, used in Map MFD when Track mode is off and map is zoomed in to scroll the map up to see farther North
  2. Command button in RCS attitude MFD to change the selected modification up so you can edit it
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.

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V[edit]

+V and -V
Used in RCS attitude MFD to add or subtract one degree each click the programmed attitude mode
VACC
Vertical acceleration, used in Surface MFD how fast rate of ascent or descent is increasing or decreasing in m/s2
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
  1. virtual cockpit
  2. Visual C++, an IDE and C++ compiler by Microsoft.
Vel
velocity, displayed in Orbit MFD
VOR
  1. very high frequency omnidirectional radio
  2. used in the Horizontal Situation Indicator MFD to indicate which VOR transmitter is selected by a NAV radio, if it's selected to a VOR transmitter
VRR
Velocity Radial Range, used to manually set the range in the Radial Velocity graph in Ascent profile MFD
VS
vertical speed
  1. Used in Surface MFD to indicate rate of ascent or descent in meters per second
VSA
Virtual Space Agency
VSI
Vertical Speed Indicator, used in Surface MFD, the VS tape reading rate of ascent or descent, in m/s
VTOL
Vertical Take Off and Landing
VTR
Velocity Tangential Range, used to manually set the range in the Tangential Velocity Range graph in Ascent profile MFD

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W[edit]

WBS
work breakdown structure
WPD
work package description
Wrp
time acceleration factor, seen in the general information display

X[edit]

XPDR
transponder, used in Docking MFD

Y[edit]

YSC
Yokohama Science Center

Z[edit]

ZM+ and ZM-
zoom,used in Map MFD to zoom the map display in and out

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Contents: Top - 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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