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#Orbiter MFD definitions
 
#Orbiter MFD definitions
 
#General Orbiter definitions
 
#General Orbiter definitions
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#Orbiter [[Add-on]] definitions
+
#Orbiter [[addon]] definitions
 
#General spaceflight 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.
 
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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==See also==
 
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* [[Russian glossary]]
 
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* [[List of Acronyms and Abbreviations/ISS|List of Acronyms and Abbreviations for the ISS]]
 
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----
 
----
 
{{compactTOC}}
 
{{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]]
 
;ApT:time to [[apoapsis]]
 
;Alt:[[altitude]]
 
;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]]
 
;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]]
 
;AU:[[astronomical unit]]
−
 
+
==B==
−
=B=
 
 
;BMW:'''B'''ate, '''M'''ueller, '''W'''hite - authors of ''Fundamentals of Astrodynamics'' (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]]
 
;CaLV:'''Ca'''rgo '''l'''aunch '''v'''ehicle, see [[Ares V]]
 
;CDI:[[course deviation indicator]]
 
;CDI:[[course deviation indicator]]
−
;CDR:
+
;CDR:commander
−
#commander
 
−
#'''c'''ritical '''d'''esign '''r'''eview
 
 
;CEV:'''C'''rew '''e'''xpedition '''v'''ehicle, see [[CEV]]
 
;CEV:'''C'''rew '''e'''xpedition '''v'''ehicle, see [[CEV]]
 
;CFD:computational fluid dynamics
 
;CFD:computational fluid dynamics
 
;CLV:'''C'''rew '''l'''aunch '''v'''ehicle, see [[Ares I]]
 
;CLV:'''C'''rew '''l'''aunch '''v'''ehicle, see [[Ares I]]
−
;COAS:'''C'''rew '''O'''ptical '''A'''lignment '''S'''ight
 
 
;COM:communication or communicator
 
;COM:communication or communicator
 
;CTD:[[crash to desktop]]
 
;CTD:[[crash to desktop]]
 
;CTRL:Control
 
;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:
 
;CVEL:
 
#[[closing velocity]]
 
#[[closing velocity]]
 
#'''C'''ommon '''V'''essel '''E'''xtensions '''L'''ight, see [[CVEL]]
 
#'''C'''ommon '''V'''essel '''E'''xtensions '''L'''ight, see [[CVEL]]
  
−
=D=
+
==D==
−
;D3D9:refers to the advanced graphics client in [[Orbiter]].
 
 
;DN:[[descending node]]
 
;DN:[[descending node]]
−
;DDT&E:'''d'''esign, '''d'''evelopment, '''t'''est and '''e'''valuation
 
 
;DG:[[Delta-glider]]
 
;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]].
 
;DG-S:[[Delta-glider]] equiped with two [[scramjet|scramjets]].
 
;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
 
;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
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;DNP:dynamic [[pressure]]
 
;DNP:dynamic [[pressure]]
 
;DNS:atmospheric density
 
;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)
 
;DST or Dst:distance (to target)
 
;DTe:time to [[ejection]], as seen on the [[transfer MFD]]
 
;DTe:time to [[ejection]], as seen on the [[transfer MFD]]
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;DTmin:time of arrical difference, as seen on the [[synchronise orbit 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]]
 
;Dv:delta [[velocity]], as seen on the [[transfer MFD]], see also [[Delta-V]]
−
 
+
==E==
−
=E=
 
 
;Ecc:[[eccentricity]]
 
;Ecc:[[eccentricity]]
 
;ECL:plane of the [[ecliptic]]
 
;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]]
 
;ESA:[[European Space Agency]]
−
;ESAS:[[w:Exploration Systems Architecture Study|Exploration Systems Architecture Study]]
+
;ESAS:[[Exploration Systems Architecture Study]]
 
;ET:[[external tank]]
 
;ET:[[external tank]]
 
;EQU:plane of the [[equator]]
 
;EQU:plane of the [[equator]]
 
;EVA:'''E'''xtra '''v'''ehicular '''a'''ctivity, see [[EVA]]
 
;EVA:'''E'''xtra '''v'''ehicular '''a'''ctivity, see [[EVA]]
  
−
=F=
+
==F==
−
;FGB:Russian abbreviation for Functional Cargo Block. See [[FGB]]
+
;FGB:russian acronym for Functional Cargo Block. See [[FGB]]
 
;FoV:field of view, as seen in the [[general information display]]
 
;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]]
 
;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]]
 
;GS:[[ground speed]]
−
;GTO:[[GTO|'''g'''eostationary '''t'''ransfer '''o'''rbit]]
+
;GTO:'''G'''eostationary '''t'''ransfer '''o'''rbit, see [[GTO]]
−
 
+
==H==
−
=H=
 
 
;H:Horizon
 
;H:Horizon
−
;HAC:[[Heading Alignment Cone]]
 
 
;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
 
;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
 
;HUD:[[heads up display]]
 
;HUD:[[heads up display]]
 
;HSI:[[horizontal situation indicator]]
 
;HSI:[[horizontal situation indicator]]
 
;HST:[[Hubble Space Telescope]]
 
;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]
 
;IAS:indicated air speed [http://en.wikipedia.org/wiki/Indicated_air_speed]
 
;IDS:[[instrument docking system]]
 
;IDS:[[instrument docking system]]
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#[[instrument landing system]]
 
#[[instrument landing system]]
 
#'''I'''nternational '''l'''aunch '''s'''ervices, a US-russian joint venture marketing [[Atlas]] and [[Proton]] launches
 
#'''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]]
 
;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]  
 
;KISS:"Keep it simple, stupid!" Famous engineering dogma.[http://en.wikipedia.org/wiki/KISS_principle]  
 
;KSC:[[Kennedy Space Center]]
 
;KSC:[[Kennedy Space Center]]
−
 
+
==L==
−
=L=
 
 
;LAN:longitude of [[ascending node]] or local-area network
 
;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]]
 
;LDEF:[[Long Duration Exposure Facility]]
 
;LEO:[[Low earth orbit]]
 
;LEO:[[Low earth orbit]]
−
;LH2:Liquid Hydrogen
 
−
;LOCV: Loss of crew and vehicle
 
 
;LOX:Liquid Oxygen
 
;LOX:Liquid Oxygen
 
;LPe:longitude of [[periapsis]]
 
;LPe:longitude of [[periapsis]]
  
−
=M=
+
==M==
 
;m:metre
 
;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:
 
;MCC:
 
#'''m'''id '''c'''ourse '''c'''orrection
 
#'''m'''id '''c'''ourse '''c'''orrection
 
#'''m'''ission '''c'''ontrol '''center'''
 
#'''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]]
 
;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]]
 
;MMU:'''m'''anned '''m'''aneuvering '''u'''nit, see [[MMU]]
 
;MnA:[[mean anomaly]]
 
;MnA:[[mean anomaly]]
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;MSx:Mission Specialist x
 
;MSx:Mission Specialist x
 
;m/s:meters per second, the SI base unit of [[velocity]]
 
;m/s:meters per second, the SI base unit of [[velocity]]
−
 
+
==N==
−
=N=
 
 
;NAV:
 
;NAV:
 
#navigation
 
#navigation
 
#[[navigation aid]]
 
#[[navigation aid]]
−
 
+
==O==
−
=O=
 
 
;OAT:outside air temperature
 
;OAT:outside air temperature
 
;Ob:obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
 
;Ob:obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
 
;OBS:[[omni bearing selector]]
 
;OBS:[[omni bearing selector]]
 
;OBT:[[orbit]], as seen on the [[orbit MFD]]
 
;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]]
 
;OS:[[orbital speed]]
−
 
+
==P==
−
=P=
 
 
;P:position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
 
;P:position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
 
;p0:atmospheric pressure at sea level
 
;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]]
 
;PG:[[prograde]]
 
;PLT:Pilot
 
;PLT:Pilot
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;PRJ:[[projection]], as seen on the [[orbit MFD]]
 
;PRJ:[[projection]], as seen on the [[orbit MFD]]
 
;PSx:Payload Specialist x
 
;PSx:Payload Specialist x
−
 
+
==R==
−
=Q=
 
−
;QR: '''q'''ualification '''r'''eview
 
−
 
 
−
=R=
 
 
;R:
 
;R:
 
#mean radius
 
#mean radius
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#angular unit ''radians''
 
#angular unit ''radians''
 
;RAnm:[[true anomaly]] of reference axis, as seen on the [[synchronise orbit MFD]]
 
;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.
 
;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]]
 
;RInc:[[relative inclination]], as seen on the [[align orbital plane MFD]]
 
;RVel:relative [[velocity]]
 
;RVel:relative [[velocity]]
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;RKA:Russian Space Agency
 
;RKA:Russian Space Agency
 
;RMS:'''R'''emote '''M'''anipulator '''S'''ystem
 
;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:
 
;SAR:
 
#'''S'''earch '''a'''nd '''r'''escue.
 
#'''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'''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]  
 
;SDK:Software Development Kit [http://en.wikipedia.org/wiki/SDK]  
 
;SDLV:'''S'''huttle '''D'''erived '''L'''aunch '''V'''ehicle, see [[Ares]]
 
;SDLV:'''S'''huttle '''D'''erived '''L'''aunch '''V'''ehicle, see [[Ares]]
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;SHP:[[ship]], as seen on the [[orbit MFD]]
 
;SHP:[[ship]], as seen on the [[orbit MFD]]
 
;Sh-ToR:ship [[time-on-reference]], as seen on the [[synchronise 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]]
 
;SLF:shuttle landing facility, see [[Cape Canaveral]]
 
;SMa:[[semi-major axis]]  
 
;SMa:[[semi-major axis]]  
Line 277: Line 206:
 
;STOVL:Short take-off, vertical landing. As performed by the DG on full fuel employing hover thrusters during takeoff.
 
;STOVL:Short take-off, vertical landing. As performed by the DG on full fuel employing hover thrusters during takeoff.
 
;STP:static [[pressure]]  
 
;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
 
;Tgt:target, esp. in [[docking]] mode
 
;Tg-ToR:target [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
 
;Tg-ToR:target [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
 
;T:orbit period, measured in seconds
 
;T:orbit period, measured in seconds
 
;TAS:true air speed [http://en.wikipedia.org/wiki/True_air_speed]
 
;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]]
 
;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:two-line elements  
 
;TLe:eject longitude, as seen on the [[transfer MFD]]
 
;TLe:eject longitude, as seen on the [[transfer MFD]]
Line 297: Line 223:
 
;TRK:Track ship, as displayed by [[map MFD]]
 
;TRK:Track ship, as displayed by [[map MFD]]
 
;TrL:[[true longitude]]
 
;TrL:[[true longitude]]
−
;TRL:'''t'''echnology '''r'''eadiness '''l'''evel
 
 
;Ts:length of siderial day
 
;Ts:length of siderial day
 
;Tth:predicted thrust time, as seen on the [[align orbital plane MFD]]
 
;Tth:predicted thrust time, as seen on the [[align orbital plane MFD]]
 
;TVEL:tangential [[velocity]]
 
;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.
 
;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).
 
;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:
 
;VC:
Line 316: Line 236:
 
;VOR:[[very high frequency omnidirectional radio]]
 
;VOR:[[very high frequency omnidirectional radio]]
 
;VS:vertical speed
 
;VS:vertical speed
−
;VSA: [[Virtual Space Agency]]
 
 
;VTOL:'''V'''ertical '''T'''ake '''O'''ff and '''L'''anding
 
;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]]
 
;Wrp:time acceleration factor, seen in the [[general information display]]
−
=X=
+
==X==
 
;XPDR:[[transponder]]
 
;XPDR:[[transponder]]
−
=Y=
+
==Y==
 
;YSC:Yokohama Science Center
 
;YSC:Yokohama Science Center
−
=Z=
+
==Z==
 
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