Editing List of Acronyms and Abbreviations

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

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

;Term:Definition
<pre>
;Term:Definition
</pre>

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:
#Definition 1
#Definition 2
#Definition 3

<pre>
;Term:
#Definition 1
#Definition 2
#Definition 3
</pre>

The order of the definitions should be like that:
#Orbiter HUD definitions
#Orbiter MFD definitions
#General Orbiter definitions
#Orbiter [[addon]] definitions
#General spaceflight definitions

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.
----
{{compactTOC}}

==A==
;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]]
==B==
;BMW:'''B'''ate, '''M'''ueller, '''W'''hite - author team of a very famous book on astrodynamics and spaceflight (written in 1971)
==C==
;CDI:[[course deviation indicator]]
;CDR:commander
;CEV:'''C'''rew '''E'''xpedition '''V'''ehicle, see [[CEV]]
;COM:communication or communicator
;CTRL:Control
;CVEL:
#[[closing velocity]]
#'''C'''ommon '''V'''essel '''E'''xtensions '''L'''ight, see [[CVEL]]
==D==
;DN:[[descending node]]
;DG:[[Delta-glider]]
;DG-S:[[Delta-glider]] equiped with two [[scramjet|scramjets]].
;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
;Dir:'''dir'''ection
;Dist:'''dist'''ance
;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]], see also [[Delta-V]]
==E==
;Ecc:[[eccentricity]]
;ECL:plane of the [[ecliptic]]
;ESA:[[European Space Agency]]
;ET:[[external tank]]
;EQU:plane of the [[equator]]
;EVA:'''E'''xtra '''v'''ehicular '''a'''ctivity, see [[EVA]]
==F==
;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==
;G:an unit of acceleration. 1 G equals the gravity acceleration on earths surface, 9.81 m/s²
;GL:Used often as vehicle name prefix for a [[Delta-glider]]
;GMT:Greenwich Mean Time.See UT [http://en.wikipedia.org/wiki/Universal_Time]
;GPS:'''g'''lobal '''p'''ositioning '''s'''ystem
;GS:[[ground speed]]
==H==
;H:Horizon
;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
;HUD:[[heads up display]]
;HSI:[[horizontal situation indicator]]
;HST:[[Hubble Space Telescope]]
;HTO:[[hypothetical orbit]], as seen on the [[transfer MFD]]
==I==
;IAS:indicated air speed [http://en.wikipedia.org/wiki/Indicated_air_speed]
;IDS:[[instrument docking system]]
;ILS:
#[[instrument landing system]]
#'''I'''nternational '''l'''aunch '''s'''ervices, a US-russian joint venture marketing [[Atlas]] and [[Proton]] launches
;Inc:Inclination
;ISP:specific impulse, see [[ISP]]
;ISS:[[International Space Station]]
==J==
;JD:julian date
==K==
;KISS:"Keep it simple, stupid!" Famous engineering dogma.[http://en.wikipedia.org/wiki/KISS_principle] 
;KSC:[[Kennedy Space Center]]
==L==
;LAN:longitude of [[ascending node]] or local-area network
;LDEF:[[Long Duration Exposure Facility]]
;LEO:[[Low earth orbit]]
;LPe:longitude of [[periapsis]]
==M==
;m:metre
;M:Mega (SI prefix). Occasionally mass or [[mach]] number
;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
;MECO:'''M'''ain '''E'''ngine '''C'''ut'''o'''ff
;MFD:multifunction display, see [[MFD]]
;MJD:[[modified julian date]]
;MMU:'''m'''anned '''m'''aneuvering '''u'''nit, see [[MMU]]
;MnA:[[mean anomaly]]
;MnL:[[mean longitude]]
;MSx:Mission Specialist x
;m/s:meters per second, the SI base unit of [[velocity]]
==N==
;NAV:
#navigation
#[[navigation aid]]
==O==
;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:'''o'''rbital '''m'''aneuvering '''s'''ystem, the 'main engines' of the [[space shuttle]] orbiter
;OS:[[orbital speed]]
==P==
;P:position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
;p0:atmospheric pressure at sea level
;PAPI:'''P'''recision '''A'''pproach '''P'''ath '''I'''ndicators, 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==
;R:
#mean radius
#specific gas constant
;r0:atmospheric density at sea level
;Rad:
#radial distance
#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:'''R'''emote '''M'''anipulator '''S'''ystem
==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. 
;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]]
;SECO:
#'''S'''econdary '''E'''ngine '''C'''ut'''o'''ff
#'''S'''ustainer '''E'''ngine '''C'''ut'''o'''ff
;Sim:
#simulation time (in seconds), as seen in the [[general information display]]
#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 [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, [[space shuttle]]
==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]
;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]]
;TRK:Track ship, as displayed by [[map MFD]]
;TrL:[[true longitude]]
;Ts:length of siderial day
;Tth:predicted thrust time, as seen on the [[align orbital plane MFD]]
;TVEL:tangential [[velocity]]
==U==
;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. 
;Vel:[[velocity]]
;VOR:[[very high frequency omnidirectional radio]]
;VS:vertical speed
;VTOL:'''V'''ertical '''T'''ake '''O'''ff and '''L'''anding
==W==
;Wrp:time acceleration factor, seen in the [[general information display]]
==X==
;XPDR:[[transponder]]
==Y==
;YSC:Yokohama Science Center
==Z==
;ZM:zoom, as seen on the [[map MFD]]

{{compactTOC}}
@@ Line 27: / Line 27: @@
 #Orbiter MFD definitions
 #General Orbiter definitions
-#Orbiter [[Add-on]] definitions
+#Orbiter [[addon]] definitions
 #General spaceflight definitions
 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.
-==See also==
-* [[Russian glossary]]
-* [[List of Acronyms and Abbreviations/ISS|List of Acronyms and Abbreviations for the ISS]]
 ----
 {{compactTOC}}
-=A=
+==A==
-;AgP:[[Argument of periapsis]]:The angle in the orbit from the point of the ascending node to the point of periapsis, Used in OrbitMFD.
+;AF:
-;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.
+;AgP:[[argument of periapsis]]
-;ApA:[[apoapsis]] apoapsis altitude
+;AN:[[ascending node]]
-;ApD:[[apoapsis]] apoapsis distance
+;ApA:[[apoapsis]] altitude
-;ApR:[[apoapsis]] apoapsis radius
+;ApD:[[apoapsis]] distance
+;ApR:[[apoapsis]] radius
 ;ApT:time to [[apoapsis]]
 ;Alt:[[altitude]]
-;AORP:'''A'''utonomous '''O'''rbiter '''R'''apid '''P'''rototype, a system to allow a [[STS|shuttle]] orbiter to land without [[crew]].
 ;atmo:[[atmosphere]]
-;AR:'''a'''cceptance '''r'''eview
-;ATV:
-#'''A'''utonomous '''T'''ransfer '''V'''ehicle, an unmanned cargo spacecraft, see [[ATV]].
-#'''A'''utomated '''T'''ransfer '''V'''ehicle[http://www.orbiterwiki.org/wiki/ATV#The_ATV]
 ;AU:[[astronomical unit]]
+==B==
-=B=
+;BMW:'''B'''ate, '''M'''ueller, '''W'''hite - author team of a very famous book on astrodynamics and spaceflight (written in 1971)
-;BMW:'''B'''ate, '''M'''ueller, '''W'''hite - authors of ''Fundamentals of Astrodynamics'' (1971)
+==C==
-=C=
-;CaLV:'''Ca'''rgo '''l'''aunch '''v'''ehicle, see [[Ares V]]
 ;CDI:[[course deviation indicator]]
-;CDR:
+;CDR:commander
-#commander
+;CEV:'''C'''rew '''E'''xpedition '''V'''ehicle, see [[CEV]]
-#'''c'''ritical '''d'''esign '''r'''eview
-;CEV:'''C'''rew '''e'''xpedition '''v'''ehicle, see [[CEV]]
-;CFD:computational fluid dynamics
-;CLV:'''C'''rew '''l'''aunch '''v'''ehicle, see [[Ares I]]
-;COAS:'''C'''rew '''O'''ptical '''A'''lignment '''S'''ight
 ;COM:communication or communicator
-;CTD:[[crash to desktop]]
 ;CTRL:Control
-;CTV:
-#'''C'''rew '''T'''ransfer '''V'''ehicle, a manned spacecraft derived from the [[ATV]], see [[CTV]]
-#'''C'''ompatibility '''T'''est '''V'''an, '''NASA'''
 ;CVEL:
 #[[closing velocity]]
 #'''C'''ommon '''V'''essel '''E'''xtensions '''L'''ight, see [[CVEL]]
+==D==
-=D=
-;D3D9:refers to the advanced graphics client in [[Orbiter]].
 ;DN:[[descending node]]
-;DDT&E:'''d'''esign, '''d'''evelopment, '''t'''est and '''e'''valuation
 ;DG:[[Delta-glider]]
-;DGIII:[[DeltagliderIII]], a famous enhanced version of the [[Delta-glider]].
-;DGIV:[[DeltaGliderIV]], an improved version of the [[DeltaGliderIII]].
-;DG4:Orbiter's stock '''DG'''
 ;DG-S:[[Delta-glider]] equiped with two [[scramjet|scramjets]].
 ;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
@@ Line 94: / Line 66: @@
 ;DNP:dynamic [[pressure]]
 ;DNS:atmospheric density
-;DPS:'''D'''ata '''P'''rocessing '''S'''ystem. Term describing the general purpose computers and their interfaces onboard various manned spacecraft.
 ;DST or Dst:distance (to target)
 ;DTe:time to [[ejection]], as seen on the [[transfer MFD]]
@@ Line 100: / Line 71: @@
 ;DTmin:time of arrical difference, as seen on the [[synchronise orbit MFD]]
 ;Dv:delta [[velocity]], as seen on the [[transfer MFD]], see also [[Delta-V]]
+==E==
-=E=
 ;Ecc:[[eccentricity]]
 ;ECL:plane of the [[ecliptic]]
-;ECSS:'''e'''uropean '''c'''ooperation for '''s'''pace '''s'''tandardization
-;ECLSS:'''E'''nvironmental '''c'''ontrol and '''l'''ife '''s'''upport '''s'''ystem
-;EELV:Evolved Expendable Launch Vehicle
 ;ESA:[[European Space Agency]]
-;ESAS:[[w:Exploration Systems Architecture Study|Exploration Systems Architecture Study]]
 ;ET:[[external tank]]
 ;EQU:plane of the [[equator]]
 ;EVA:'''E'''xtra '''v'''ehicular '''a'''ctivity, see [[EVA]]
+==F==
-=F=
+;FGB:russian acronym for Functional Cargo Block. See [[FGB]]
-;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]]
+;FPS:[[frame rate]], 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.
+==G==
+;G:an unit of acceleration. 1 G equals the gravity acceleration on earths surface, 9.81 m/s²
-=G=
-;g:a unit of acceleration. 1g equals the gravity acceleration on earths surface, 9.81 m/s²
 ;GL:Used often as vehicle name prefix for a [[Delta-glider]]
-;GET:'''G'''round '''E'''lapsed '''T'''ime [http://history.nasa.gov/SP-4029/Apollo_00c_Introduction.htm]
+;GMT:Greenwich Mean Time.See UT [http://en.wikipedia.org/wiki/Universal_Time]
-;GLOC:'''G'''ravity-induced '''L'''oss '''o'''f '''C'''onsciousness
+;GPS:'''g'''lobal '''p'''ositioning '''s'''ystem
-;GMT:Greenwich Mean Time.See [[w:Universal Time|Universal Time on Wikipedia]]
-;GPDS:[[GPDS|Generic Payload Description System]]
-;GPS:'''G'''lobal '''P'''ositioning '''S'''ystem
 ;GS:[[ground speed]]
-;GTO:[[GTO|'''g'''eostationary '''t'''ransfer '''o'''rbit]]
+==H==
-=H=
 ;H:Horizon
-;HAC:[[Heading Alignment Cone]]
 ;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
 ;HUD:[[heads up display]]
 ;HSI:[[horizontal situation indicator]]
 ;HST:[[Hubble Space Telescope]]
-;HTO:[[hypothetical transfer orbit]], as seen on the [[transfer MFD]]
+;HTO:[[hypothetical orbit]], as seen on the [[transfer MFD]]
+==I==
-=I=
 ;IAS:indicated air speed [http://en.wikipedia.org/wiki/Indicated_air_speed]
 ;IDS:[[instrument docking system]]
@@ Line 145: / Line 101: @@
 #[[instrument landing system]]
 #'''I'''nternational '''l'''aunch '''s'''ervices, a US-russian joint venture marketing [[Atlas]] and [[Proton]] launches
-;Inc:Inclination (http://en.wikipedia.org/wiki/Inclination)
+;Inc:Inclination
-;ISP:[[specific impulse]]
+;ISP:specific impulse, see [[ISP]]
 ;ISS:[[International Space Station]]
+==J==
-=J=
+;JD:julian date
-;JD:[[Julian date]]
+==K==
-;JWST:'''J'''ames '''W'''ebb '''S'''pace '''T'''elescope
-;JSC:  Lyndon B. '''J'''ohnson '''S'''pace '''C'''enter
-=K=
 ;KISS:"Keep it simple, stupid!" Famous engineering dogma.[http://en.wikipedia.org/wiki/KISS_principle]
 ;KSC:[[Kennedy Space Center]]
+==L==
-=L=
 ;LAN:longitude of [[ascending node]] or local-area network
-;LCC:
-#'''l'''aunch '''c'''ontrol '''c'''enter
-#'''l'''ife '''c'''ycle '''c'''ost
 ;LDEF:[[Long Duration Exposure Facility]]
 ;LEO:[[Low earth orbit]]
-;LH2:Liquid Hydrogen
-;LOCV: Loss of crew and vehicle
-;LOX:Liquid Oxygen
 ;LPe:longitude of [[periapsis]]
+==M==
-=M=
 ;m:metre
-;M:Mega (SI prefix for 10<sup>6</sup>). Occasionally mass or [[mach]] number
+;M:Mega (SI prefix). Occasionally mass or [[mach]] number
 ;MCC:
 #'''m'''id '''c'''ourse '''c'''orrection
 #'''m'''ission '''c'''ontrol '''center'''
-;MCC-H:'''m'''ission '''c'''ontrol '''c'''enter '''H'''ouston
+;MCC-H:'''m'''ission '''c'''ontrol '''c'''enter '''h'''ouston
-;MCC-M:'''m'''ission '''c'''ontrol '''c'''enter '''M'''oscow
+;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
-;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:multifunction display, see [[MFD]]
-;MJD:[[modified Julian date]]
+;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]]
@@ Line 190: / Line 130: @@
 ;MSx:Mission Specialist x
 ;m/s:meters per second, the SI base unit of [[velocity]]
+==N==
-=N=
 ;NAV:
 #navigation
 #[[navigation aid]]
+==O==
-=O=
 ;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]]
-;OMBUU: '''O'''rbiter '''M'''id'''b'''ody '''U'''mbilical '''U'''nit
+;OMS:'''o'''rbital '''m'''aneuvering '''s'''ystem, the 'main engines' of the [[space shuttle]] orbiter
-;[[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:[[orbital speed]]
+==P==
-=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 centreline.
-;PAPI:'''P'''recision '''A'''pproach '''P'''ath '''I'''ndicators, lit runway centerline.
+;PB:
-;PB:[[Shuttle PB]]
+;PeA:[[periapsis]] altitude
-;PDR:'''p'''reliminary '''d'''esign '''r'''eview
+;PeD:[[periapsis]] distance
-;PDRS:'''P'''ayload '''D'''eployment and '''R'''etrieval '''S'''ystem, the official name of the robot arm of the Space Shuttle
+;PeR:[[periapsis]] radius
-;PRR:'''p'''reliminary '''r'''equirements '''r'''eview
-;PeA:[[periapsis]] altitude. Altitude of periapsis above the surface of the orbited body
-;PeD:[[periapsis]] distance. See PeR.
-;PeR:[[periapsis]] radius. Distance of periapsis from the center of the orbited body
-;PeT:time to [[periapsis]] in seconds.
 ;PG:[[prograde]]
 ;PLT:Pilot
-;PMI:'''P'''rincipal '''m'''oments of '''i'''nertia, see [[PMI]]
 ;Pos:position
 ;PRJ:[[projection]], as seen on the [[orbit MFD]]
 ;PSx:Payload Specialist x
+==R==
-=Q=
-;QR: '''q'''ualification '''r'''eview
-=R=
 ;R:
 #mean radius
@@ Line 238: / Line 163: @@
 #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.
-;R&D:'''r'''esearch and '''d'''evelopment
-;RDT&E:'''r'''esearch, '''d'''evelopment, '''t'''esting and '''e'''valuation
 ;RInc:[[relative inclination]], as seen on the [[align orbital plane MFD]]
 ;RVel:relative [[velocity]]
@@ Line 246: / Line 170: @@
 ;RKA:Russian Space Agency
 ;RMS:'''R'''emote '''M'''anipulator '''S'''ystem
-;RS:Russian-side, used as prefix for orientation when describing ISS components.
+==S==
-;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.
-=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]]
-;SDK:Software Development Kit [http://en.wikipedia.org/wiki/SDK]
 ;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]]
@@ Line 267: / Line 184: @@
 ;SHP:[[ship]], as seen on the [[orbit MFD]]
 ;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]]
 ;SLF:shuttle landing facility, see [[Cape Canaveral]]
 ;SMa:[[semi-major axis]]
@@ Line 277: / Line 193: @@
 ;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]]
+;STS:'''s'''pace '''t'''ransportation '''s'''ystem, [[space shuttle]]
+==T==
-=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]]
@@ Line 297: / Line 209: @@
 ;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==
-=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==
-=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:
@@ Line 316: / Line 222: @@
 ;VOR:[[very high frequency omnidirectional radio]]
 ;VS:vertical speed
-;VSA: [[Virtual Space Agency]]
 ;VTOL:'''V'''ertical '''T'''ake '''O'''ff and '''L'''anding
+==W==
-=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=
+==X==
 ;XPDR:[[transponder]]
-=Y=
+==Y==
 ;YSC:Yokohama Science Center
-=Z=
+==Z==
 ;ZM:zoom, as seen on the [[map MFD]]
 {{compactTOC}}
-[[Category: Articles]]
-[[Category:Glossary]]