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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.
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* AF -
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* AgP - [[argument of periapsis]]
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One entry in this list consists of a term with one or more definitions, like:
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* ApD - [[apoasis]] distance
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* ApR - [[apoasis]] radius
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;Term:Definition
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* ApT - time to [[apoasis]]
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<pre>
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* Alt - [[altitude]]
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;Term:Definition
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* atmo - [[atmosphere]]
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</pre>
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* COM -
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* CTRL - Control
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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.
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* DG - [[Delta-glider]]
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* DG-S [[Delta-glider]] equiped with two [[scramjet|scramjets]].
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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:
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* DIV - [[divergent]], i.e. [[yaw]] [[gimbal]] mode.
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;Term:
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* Ecc - [[eccentricity]]
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#Definition 1
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* ECL - plane of the [[ecliptic]]
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#Definition 2
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* ET - [[external tank]]
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#Definition 3
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* EQU - plane of the [[equator]]
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* FoV - field of view, as seen in the [[general information display]]
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<pre>
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* FPS - [[frame rate]], as seen in the [[general information display]]
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;Term:
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* G -  
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#Definition 1
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* GL - [[Delta-glider]]
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#Definition 2
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* H - Horizon
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#Definition 3
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* HUD - [[heads up display]]
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</pre>
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* HSI -
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* HST - [[Hubble Space Telescope]]
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The order of the definitions should be like that:
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* IDS - [[instrument docking system]]
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#Orbiter HUD definitions
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* ILS - [[instrument landing system]]
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#Orbiter MFD definitions
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* Inc - Inclination
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#General Orbiter definitions
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* ISS - [[International Space Station]]
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#Orbiter [[Add-on]] definitions
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* JD - julian date
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#General spaceflight definitions
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* KSC - [[Kennedy Space Center]]
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* LAN - longitude of [[ascending node]] or local-area network
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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.
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* LDEF - [[Long Duration Exposure Facility]]
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* LEO - [[low earth orbit]]
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==See also==
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* LPe - longitude of [[periapsis]]
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* m - metre
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* [[Russian glossary]]
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* M - mass
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* [[List of Acronyms and Abbreviations/ISS|List of Acronyms and Abbreviations for the ISS]]
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* MFD -  
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* Mir - the Russian space station [[Mir]], commonly assumed to be an acronym, but not.
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----
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* MJD - [[modified julian date]]
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{{compactTOC}}
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* MMU -
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* MnA - [[mean anomaly]]
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=A=
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* MnL - [[mean longitude]]
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;AgP:[[Argument of periapsis]]:The angle in the orbit from the point of the ascending node to the point of periapsis, Used in OrbitMFD.
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* m/s - meters per second, a common [[measurement]] of [[velocity]]
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;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 OrbitMFD as a dotted vector line connecting to a solid square on the orbit.
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* NAV -
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;ApA:[[apoapsis]] apoapsis altitude
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* Ob - obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
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;ApD:[[apoapsis]] apoapsis distance
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* OBT - [[orbit]], as seen on the [[Orbit MFD]]
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;ApR:[[apoapsis]] apoapsis radius
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* OMS -
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;ApT:time to [[apoapsis]]
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* p0 - atmospheric pressure at sea level
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;Alt:[[altitude]]
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* PAPI -
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;AORP:'''A'''utonomous '''O'''rbiter '''R'''apid '''P'''rototype, a system to allow a [[STS|shuttle]] orbiter to land without [[crew]].
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* PB -
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;atmo:[[atmosphere]]
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* PeD - [[periapsis]] distance
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;AR:'''a'''cceptance '''r'''eview
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* PeR - [[apoasis]] radius
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;ATV:
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* PG - prograde
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#'''A'''utonomous '''T'''ransfer '''V'''ehicle, an unmanned cargo spacecraft, see [[ATV]].
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* PRJ - [[projection]], as seen on the [[Orbit MFD]]
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#'''A'''utomated '''T'''ransfer '''V'''ehicle[http://www.orbiterwiki.org/wiki/ATV#The_ATV]
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* R - mean radius or specific gas constant
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;AU:[[astronomical unit]]
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* r0 - atmospheric density at sea level
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* Rad - radial distance
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=B=
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* RCS - [[reaction control system]]
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;BMW:'''B'''ate, '''M'''ueller, '''W'''hite - authors of ''Fundamentals of Astrodynamics'' (1971)
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* RG - retrograde
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* RMS -  
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=C=
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* Sim - simulation time (in seconds), as seen in the [[general information display]] or a common abbreviation for "simulator"
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;CaLV:'''Ca'''rgo '''l'''aunch '''v'''ehicle, see [[Ares V]]
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* SHP - [[ship]], as seen on the [[Orbit MFD]]
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;CDI:[[course deviation indicator]]
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* SLF -
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;CDR:
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* SMa - [[semi-major axis]]  
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#commander
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* SME -
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#'''c'''ritical '''d'''esign '''r'''eview
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* SMi - [[semi-minor axis]]
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;CEV:'''C'''rew '''e'''xpedition '''v'''ehicle, see [[CEV]]
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* SRB -  
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;CFD:computational fluid dynamics
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* STS -
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;CLV:'''C'''rew '''l'''aunch '''v'''ehicle, see [[Ares I]]
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* Tgt - target, esp. in [[docking]] mode
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;COAS:'''C'''rew '''O'''ptical '''A'''lignment '''S'''ight
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* T - orbit period, measured in seconds
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;COM:communication or communicator
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* TrA - [[true anomaly]]
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;CTD:[[crash to desktop]]
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* TrL - [[true longitude]]
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;CTRL:Control
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* Ts - length of siderial day
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;CTV:
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* UT - universal time
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#'''C'''rew '''T'''ransfer '''V'''ehicle, a manned spacecraft derived from the [[ATV]], see [[CTV]]
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* VASI -
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#'''C'''ompatibility '''T'''est '''V'''an, '''NASA'''
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* VC - virtual cockpit
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;CVEL:
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* Vel - [[velocity]]
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#[[closing velocity]]
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* VOR - [[very high frequency omnidirectional radio]]
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#'''C'''ommon '''V'''essel '''E'''xtensions '''L'''ight, see [[CVEL]]
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* VTOL -
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* Wrp - time acceleration factor, seen in the [[general information display]]
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=D=
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* XPDR -
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;D3D9:refers to the advanced graphics client in [[Orbiter]].
 
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;DN:[[descending node]]
 
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;DDT&E:'''d'''esign, '''d'''evelopment, '''t'''est and '''e'''valuation
 
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;DG:[[Delta-glider]]
 
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;DGIII:[[DeltagliderIII]], a famous enhanced version of the [[Delta-glider]].
 
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;DGIV:[[DeltaGliderIV]], an improved version of the [[DeltaGliderIII]].
 
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;DG4:Orbiter's stock '''DG'''
 
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;DG-S:[[Delta-glider]] equiped with two [[scramjet|scramjets]].
 
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;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
 
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;Dir:'''dir'''ection
 
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;Dist:'''dist'''ance
 
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;DLng:longitude difference, as seen on the [[synchronise orbit MFD]]
 
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;DNP:dynamic [[pressure]]
 
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;DNS:atmospheric density
 
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;DPS:'''D'''ata '''P'''rocessing '''S'''ystem. Term describing the general purpose computers and their interfaces onboard various manned spacecraft.
 
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;DST or Dst:distance (to target)
 
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;DTe:time to [[ejection]], as seen on the [[transfer MFD]]
 
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;DTi:time to intercept, as seen on the [[transfer MFD]]
 
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;DTmin:time of arrical difference, as seen on the [[synchronise orbit MFD]]
 
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;Dv:delta [[velocity]], as seen on the [[transfer MFD]], see also [[Delta-V]]
 
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=E=
 
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;Ecc:[[eccentricity]]
 
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;ECL:plane of the [[ecliptic]]
 
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;ECSS:'''e'''uropean '''c'''ooperation for '''s'''pace '''s'''tandardization
 
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;ECLSS:'''E'''nvironmental '''c'''ontrol and '''l'''ife '''s'''upport '''s'''ystem
 
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;EELV:Evolved Expendable Launch Vehicle
 
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;ESA:[[European Space Agency]]
 
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;ESAS:[[w:Exploration Systems Architecture Study|Exploration Systems Architecture Study]]
 
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;ET:[[external tank]]
 
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;EQU:plane of the [[equator]]
 
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;EVA:'''E'''xtra '''v'''ehicular '''a'''ctivity, see [[EVA]]
 
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=F=
 
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;FGB:Russian abbreviation for Functional Cargo Block. See [[FGB]]
 
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;FoV:field of view, as seen in the [[general information display]]
 
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;FPS:[[frame rate]] (frames per second), as seen in the [[general information display]]
 
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;FRF:'''F'''light '''R'''eadiness '''F'''iring, a launch countdown test of the Shuttle running all except SRB ignition and lift-off.
 
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=G=
 
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;g:a unit of acceleration. 1g equals the gravity acceleration on earths surface, 9.81 m/s²
 
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;GL:Used often as vehicle name prefix for a [[Delta-glider]]
 
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;GET:'''G'''round '''E'''lapsed '''T'''ime [http://history.nasa.gov/SP-4029/Apollo_00c_Introduction.htm]
 
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;GLOC:'''G'''ravity-induced '''L'''oss '''o'''f '''C'''onsciousness 
 
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;GMT:Greenwich Mean Time.See [[w:Universal Time|Universal Time on Wikipedia]]
 
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;GPDS:[[GPDS|Generic Payload Description System]]
 
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;GPS:'''G'''lobal '''P'''ositioning '''S'''ystem
 
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;GS:[[ground speed]]
 
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;GTO:[[GTO|'''g'''eostationary '''t'''ransfer '''o'''rbit]]
 
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=H=
 
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;H:Horizon
 
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;HAC:[[Heading Alignment Cone]]
 
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;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
 
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;HUD:[[heads up display]]
 
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;HSI:[[horizontal situation indicator]]
 
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;HST:[[Hubble Space Telescope]]
 
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;HTO:[[hypothetical transfer orbit]], as seen on the [[transfer MFD]]
 
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=I=
 
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;IAS:indicated air speed [http://en.wikipedia.org/wiki/Indicated_air_speed]
 
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;IDS:[[instrument docking system]]
 
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;ILS:
 
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#[[instrument landing system]]
 
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#'''I'''nternational '''l'''aunch '''s'''ervices, a US-russian joint venture marketing [[Atlas]] and [[Proton]] launches
 
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;Inc:Inclination (http://en.wikipedia.org/wiki/Inclination)
 
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;ISP:[[specific impulse]]
 
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;ISS:[[International Space Station]]
 
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=J=
 
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;JD:[[Julian date]]
 
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;JWST:'''J'''ames '''W'''ebb '''S'''pace '''T'''elescope
 
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;JSC:  Lyndon B. '''J'''ohnson '''S'''pace '''C'''enter
 
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=K=
 
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;KISS:"Keep it simple, stupid!" Famous engineering dogma.[http://en.wikipedia.org/wiki/KISS_principle]
 
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;KSC:[[Kennedy Space Center]]
 
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=L=
 
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;LAN:longitude of [[ascending node]] or local-area network
 
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;LCC:
 
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#'''l'''aunch '''c'''ontrol '''c'''enter
 
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#'''l'''ife '''c'''ycle '''c'''ost
 
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;LDEF:[[Long Duration Exposure Facility]]
 
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;LEO:[[Low earth orbit]]
 
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;LH2:Liquid Hydrogen
 
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;LOCV: Loss of crew and vehicle
 
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;LOX:Liquid Oxygen
 
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;LPe:longitude of [[periapsis]]
 
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=M=
 
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;m:metre
 
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;M:Mega (SI prefix for 10<sup>6</sup>). Occasionally mass or [[mach]] number
 
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;MCC:
 
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#'''m'''id '''c'''ourse '''c'''orrection
 
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#'''m'''ission '''c'''ontrol '''center'''
 
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;MCC-H:'''m'''ission '''c'''ontrol '''c'''enter '''H'''ouston
 
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;MCC-M:'''m'''ission '''c'''ontrol '''c'''enter '''M'''oscow
 
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;MDR:'''m'''ission '''d'''efinition '''r'''eview
 
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;MECO:'''m'''ain '''e'''ngine '''c'''ut'''o'''ff
 
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;MET:'''M'''ission '''E'''lapsed '''T'''ime. See [[w:Mission Elapsed Time|Mission Elapsed Time on Wikipedia]].
 
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;MFD:multifunction display, see [[MFD]]
 
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;MJD:[[modified Julian date]]
 
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;MLP:[[Mobile Launcher Platform]]
 
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;MMOD:'''M'''icro'''m'''eteorites and '''o'''rbital '''d'''ebris
 
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;MMU:'''m'''anned '''m'''aneuvering '''u'''nit, see [[MMU]]
 
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;MnA:[[mean anomaly]]
 
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;MnL:[[mean longitude]]
 
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;MSx:Mission Specialist x
 
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;m/s:meters per second, the SI base unit of [[velocity]]
 
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=N=
 
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;NAV:
 
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#navigation
 
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#[[navigation aid]]
 
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=O=
 
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;OAT:outside air temperature
 
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;Ob:obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
 
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;OBS:[[omni bearing selector]]
 
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;OBT:[[orbit]], as seen on the [[orbit MFD]]
 
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;OMBUU: '''O'''rbiter '''M'''id'''b'''ody '''U'''mbilical '''U'''nit
 
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;[[OMP]]:'''O'''rbiter '''M'''ultiplayer '''P'''roject, an ongoing program to create a multiplayer server in Orbiter.
 
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;OMS:'''O'''rbital '''M'''aneuvering '''S'''ystem, the 'main engines' of the [[space shuttle]] orbiter
 
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;OS:[[orbital speed]]
 
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=P=
 
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;P:position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
 
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;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.
 
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;PB:[[Shuttle PB]]
 
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;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
 
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;PRR:'''p'''reliminary '''r'''equirements '''r'''eview
 
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;PeA:[[periapsis]] altitude. Altitude of periapsis above the surface of the orbited body
 
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;PeD:[[periapsis]] distance. See PeR.
 
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;PeR:[[periapsis]] radius. Distance of periapsis from the center of the orbited body
 
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;PeT:time to [[periapsis]] in seconds.
 
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;PG:[[prograde]]
 
−
;PLT:Pilot
 
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;PMI:'''P'''rincipal '''m'''oments of '''i'''nertia, see [[PMI]]
 
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;Pos:position
 
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;PRJ:[[projection]], as seen on the [[orbit MFD]]
 
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;PSx:Payload Specialist x
 
−
 
 
−
=Q=
 
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;QR: '''q'''ualification '''r'''eview
 
−
 
 
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=R=
 
−
;R:
 
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#mean radius
 
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#specific gas constant
 
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;r0:atmospheric density at sea level
 
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;Rad:
 
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#radial distance
 
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#angular unit ''radians''
 
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;RAnm:[[true anomaly]] of reference axis, as seen on the [[synchronise orbit MFD]]
 
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;RCS:[[reaction control system]], spacebourne orientation rocket system.
 
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;R&D:'''r'''esearch and '''d'''evelopment
 
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;RDT&E:'''r'''esearch, '''d'''evelopment, '''t'''esting and '''e'''valuation
 
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;RInc:[[relative inclination]], as seen on the [[align orbital plane MFD]]
 
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;RVel:relative [[velocity]]
 
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;RG:[[retrograde]]
 
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;RKA:Russian Space Agency
 
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;RMS:'''R'''emote '''M'''anipulator '''S'''ystem
 
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;RS:Russian-side, used as prefix for orientation when describing ISS components.
 
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;RSLS:'''R'''edundant '''s'''et '''l'''aunch '''s'''equencer, the computer systems responsible for the ignition of the SSMEs in the [[Space Shuttle]] orbiter.
 
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;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.
 
−
 
 
−
=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.
 
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;S/C: [[spacecraft|'''s'''pace'''c'''raft]]
 
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;SDK:Software Development Kit [http://en.wikipedia.org/wiki/SDK]
 
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;SDLV:'''S'''huttle '''D'''erived '''L'''aunch '''V'''ehicle, see [[Ares]]
 
−
;SDHLV:'''S'''huttle '''D'''erived '''H'''eavy '''L'''aunch '''V'''ehicle, see [[Ares V]]
 
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;SECO:
 
−
#'''S'''econdary '''E'''ngine '''C'''ut'''o'''ff
 
−
#'''S'''ustainer '''E'''ngine '''C'''ut'''o'''ff
 
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;Sim:
 
−
#simulation time (in seconds), as seen in the [[general information display]]
 
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#a common abbreviation for "simulator"
 
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;SHP:[[ship]], as seen on the [[orbit MFD]]
 
−
;Sh-ToR:ship [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
 
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;SI unit: The metric system of measurement, the modern name, see [[SI unit]]
 
−
;SLF:shuttle landing facility, see [[Cape Canaveral]]
 
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;SMa:[[semi-major axis]]  
 
−
;SSME:Space Shuttle Main Engines [http://en.wikipedia.org/wiki/SSME_%28rocket_engine%29]
 
−
;SMi:[[semi-minor axis]]
 
−
;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]].
 
−
;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]]
 
−
;STS:'''s'''pace '''t'''ransportation '''s'''ystem, AKA space shuttle, see [[space transportation system]]
 
−
 
 
−
=T=
 
−
;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 [http://en.wikipedia.org/wiki/True_air_speed]
 
−
;TAEM:Terminal Area Energy Management
 
−
;TEI:'''T'''rans '''E'''arth '''I'''njection[http://en.wikipedia.org/wiki/Trans_Earth_Injection]
 
−
;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:time to node, as seen on the [[align orbital plane MFD]]
 
−
;TOFS:tangential offset [[docking MFD]]
 
−
;TrA:[[true anomaly]]
 
−
;TRK:Track ship, as displayed by [[map MFD]]
 
−
;TrL:[[true longitude]]
 
−
;TRL:'''t'''echnology '''r'''eadiness '''l'''evel
 
−
;Ts:length of siderial day
 
−
;Tth:predicted thrust time, as seen on the [[align orbital plane MFD]]
 
−
;TVEL:tangential [[velocity]]
 
−
 
 
−
=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.
 
−
;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.
 
−
 
 
−
=V=
 
−
;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.
 
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;Vel:[[velocity]]
 
−
;VOR:[[very high frequency omnidirectional radio]]
 
−
;VS:vertical speed
 
−
;VSA: [[Virtual Space Agency]]
 
−
;VTOL:'''V'''ertical '''T'''ake '''O'''ff and '''L'''anding
 
−
 
 
−
=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]]
 
−
=Y=
 
−
;YSC:Yokohama Science Center
 
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=Z=
 
−
;ZM:zoom, as seen on the [[map MFD]]
 
−
 
 
−
{{compactTOC}}
 
−
 
 
−
[[Category: Articles]]
 
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[[Category:Glossary]]
 

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