Editing List of Acronyms and Abbreviations

Jump to navigation Jump to search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.

Latest revision Your text
Line 1: Line 1:
This list contains definitions for [[Orbiter]] or important [[spaceflight]] acronyms or abbreviations, especially those appearing in [[MFD|MFDs]] and various [[HUD]] modes.
+
* AF -
 
+
* AgP - [[argument of periapsis]]
One entry in this list consists of a term with one or more definitions, like:
+
* AN - [[ascending node]]
 
+
* ApA - [[apoapsis]] altitude
;Term:Definition
+
* ApD - [[apoapsis]] distance
<pre>
+
* ApR - [[apoapsis]] radius
;Term:Definition
+
* ApT - time to [[apoapsis]]
</pre>
+
* Alt - [[altitude]]
 
+
* atmo - [[atmosphere]]
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.
+
* AU - [[astronomical unit]]
 
+
* CDI - [[course deviation indicator]]
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:
+
* CDR - commander
;Term:
+
* [[CEV]] - Crew Expedition Vehicle
#Definition 1
+
* COM - communication or communicator
#Definition 2
+
* CTRL - Control
#Definition 3
+
* CVEL - [[closing velocity]]
 
+
* CVEL - Common Vessel Extensions Light, see [[CVEL]]
<pre>
+
* DN - [[descending node]]
;Term:
+
* DG - [[Delta-glider]]
#Definition 1
+
* DG-S [[Delta-glider]] equiped with two [[scramjet|scramjets]].
#Definition 2
+
* DIV - [[divergent]], i.e. [[yaw]] [[gimbal]] mode.
#Definition 3
+
* Dir - direction
</pre>
+
* Dist - distance
 
+
* DLng - longitude difference, as seen on the [[synchronise orbit MFD]]
The order of the definitions should be like that:
+
* DNP - dynamic [[pressure]]
#Orbiter HUD definitions
+
* DNS - atmospheric density
#Orbiter MFD definitions
+
* DST or Dst - distance (to target)
#General Orbiter definitions
+
* DTe - time to [[ejection]], as seen on the [[transfer MFD]]
#Orbiter [[Add-on]] definitions
+
* DTi - time to intercept, as seen on the [[transfer MFD]]
#General spaceflight definitions
+
* DTmin - time of arrical difference, as seen on the [[synchronise orbit MFD]]
 
+
* Dv - delta [[velocity]], as seen on the [[transfer MFD]]
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.
+
* Ecc - [[eccentricity]]
 
+
* ECL - plane of the [[ecliptic]]
==See also==
+
* ESA - [[European Space Agency]]
 
+
* ET - [[external tank]]
* [[Russian glossary]]
+
* EQU - plane of the [[equator]]
* [[List of Acronyms and Abbreviations/ISS|List of Acronyms and Abbreviations for the ISS]]
+
* [[EVA]] - Extra vehicular activity
 
+
* FGB - russian abbreviation for Functional Cargo Block. See [[FGB]]
----
+
* FoV - field of view, as seen in the [[general information display]]
{{compactTOC}}
+
* FPS - [[frame rate]], as seen in the [[general information display]]
 
+
* G - an unit of acceleration. 1 G equals the gravity acceleration on earths surface, 9.81 m/s²
=A=
+
* GL - [[Delta-glider]]
;AgP:[[Argument of periapsis]]:The angle in the orbit from the point of the ascending node to the point of periapsis, Used in OrbitMFD.
+
* GS - [[ground speed]]
;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.
+
* GMT - Greenwich Mean Time. Earth's mean time standard.
;ApA:[[apoapsis]] apoapsis altitude
+
* H - Horizon
;ApD:[[apoapsis]] apoapsis distance
+
* HUD - [[heads up display]]
;ApR:[[apoapsis]] apoapsis radius
+
* HSI - [[horizontal situation indicator]]
;ApT:time to [[apoapsis]]
+
* HST - [[Hubble Space Telescope]]
;Alt:[[altitude]]
+
* HTO - [[hypothetical orbit]], as seen on the [[transfer MFD]]
;AORP:'''A'''utonomous '''O'''rbiter '''R'''apid '''P'''rototype, a system to allow a [[STS|shuttle]] orbiter to land without [[crew]].
+
* IAS - indicated air speed [http://en.wikipedia.org/wiki/Indicated_air_speed]
;atmo:[[atmosphere]]
+
* IDS - [[instrument docking system]]
;AR:'''a'''cceptance '''r'''eview
+
* ILS - [[instrument landing system]]
;ATV:
+
* Inc - Inclination
#'''A'''utonomous '''T'''ransfer '''V'''ehicle, an unmanned cargo spacecraft, see [[ATV]].
+
* ISP - specific impulse
#'''A'''utomated '''T'''ransfer '''V'''ehicle[http://www.orbiterwiki.org/wiki/ATV#The_ATV]
+
* ISS - [[International Space Station]]
;AU:[[astronomical unit]]
+
* JD - julian date
 
+
* KISS - "Keep it simple, stupid!" Famous engineering dogma.
=B=
+
* KSC - [[Kennedy Space Center]]
;BMW:'''B'''ate, '''M'''ueller, '''W'''hite - authors of ''Fundamentals of Astrodynamics'' (1971)
+
* LAN - longitude of [[ascending node]] or local-area network
 
+
* LDEF - [[Long Duration Exposure Facility]]
=C=
+
* LEO - [[Low earth orbit]]
;CaLV:'''Ca'''rgo '''l'''aunch '''v'''ehicle, see [[Ares V]]
+
* LPe - longitude of [[periapsis]]
;CDI:[[course deviation indicator]]
+
* m - metre
;CDR:
+
* M - Mega (SI prefix). Occasionally mass or [[mach]] number
#commander
+
* MECO - Main Engine Cutoff
#'''c'''ritical '''d'''esign '''r'''eview
+
* [[MFD]] - multifunction display
;CEV:'''C'''rew '''e'''xpedition '''v'''ehicle, see [[CEV]]
+
* MJD - [[modified julian date]]
;CFD:computational fluid dynamics
+
* MMU - Manned Maneuvering Unit
;CLV:'''C'''rew '''l'''aunch '''v'''ehicle, see [[Ares I]]
+
* MnA - [[mean anomaly]]
;COAS:'''C'''rew '''O'''ptical '''A'''lignment '''S'''ight
+
* MnL - [[mean longitude]]
;COM:communication or communicator
+
* MSx - Mission Specialist x
;CTD:[[crash to desktop]]
+
* m/s - meters per second, the SI base unit of [[velocity]]
;CTRL:Control
+
* NAV - navigation or [[navigation aid]]
;CTV:
+
* OAT - outside air temperature
#'''C'''rew '''T'''ransfer '''V'''ehicle, a manned spacecraft derived from the [[ATV]], see [[CTV]]
+
* Ob - obliquity of ecliptic (tilt of axis of rotation against plane of ecliptic)
#'''C'''ompatibility '''T'''est '''V'''an, '''NASA'''
+
* OBS - [[omni bearing selector]]
;CVEL:
+
* OBT - [[orbit]], as seen on the [[orbit MFD]]
#[[closing velocity]]
+
* OMS - orbital maneuvering system, the 'main engines' of the orbital [[space shuttle]]
#'''C'''ommon '''V'''essel '''E'''xtensions '''L'''ight, see [[CVEL]]
+
* OS - [[orbital speed]]
 
+
* P - position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
=D=
+
* p0 - atmospheric pressure at sea level
;D3D9:refers to the advanced graphics client in [[Orbiter]].
+
* PAPI - Precision Approach Path Indicators, lit runway centreline.
;DN:[[descending node]]
+
* PB -
;DDT&E:'''d'''esign, '''d'''evelopment, '''t'''est and '''e'''valuation
+
* PeA - [[periapsis]] altitude
;DG:[[Delta-glider]]
+
* PeD - [[periapsis]] distance
;DGIII:[[DeltagliderIII]], a famous enhanced version of the [[Delta-glider]].
+
* PeR - [[periapsis]] radius
;DGIV:[[DeltaGliderIV]], an improved version of the [[DeltaGliderIII]].
+
* PG - [[prograde]]
;DG4:Orbiter's stock '''DG'''
+
* PLT - Pilot
;DG-S:[[Delta-glider]] equiped with two [[scramjet|scramjets]].
+
* Pos - position
;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
+
* PRJ - [[projection]], as seen on the [[orbit MFD]]
;Dir:'''dir'''ection
+
* PSx - Payload Specialist x
;Dist:'''dist'''ance
+
* R - mean radius or specific gas constant
;DLng:longitude difference, as seen on the [[synchronise orbit MFD]]
+
* r0 - atmospheric density at sea level
;DNP:dynamic [[pressure]]
+
* Rad - radial distance (not to be confused with angular unit ''radians'')
;DNS:atmospheric density
+
* RAnm - [[true anomaly]] of reference axis, as seen on the [[synchronise orbit MFD]]
;DPS:'''D'''ata '''P'''rocessing '''S'''ystem. Term describing the general purpose computers and their interfaces onboard various manned spacecraft.
+
* Rate - rate of change, as seen on the [[align orbital plane MFD]]
;DST or Dst:distance (to target)
+
* RCS - [[reaction control system]], spacebourne orientation rocket system.
;DTe:time to [[ejection]], as seen on the [[transfer MFD]]
+
* RInc - [[relative inclination]], as seen on the [[align orbital plane MFD]]
;DTi:time to intercept, as seen on the [[transfer MFD]]
+
* RVel - relative [[velocity]]
;DTmin:time of arrical difference, as seen on the [[synchronise orbit MFD]]
+
* RG - [[retrograde]]
;Dv:delta [[velocity]], as seen on the [[transfer MFD]], see also [[Delta-V]]
+
* RMS - Remote Manipulator System
 
+
* SDLV - Shuttle Derived Launch Vehicle
=E=
+
* SECO - Secondary Engine Cutoff
;Ecc:[[eccentricity]]
+
* Sim - simulation time (in seconds), as seen in the [[general information display]] or a common abbreviation for "simulator"
;ECL:plane of the [[ecliptic]]
+
* SHP - [[ship]], as seen on the [[orbit MFD]]
;ECSS:'''e'''uropean '''c'''ooperation for '''s'''pace '''s'''tandardization
+
* Sh-ToR - ship [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
;ECLSS:'''E'''nvironmental '''c'''ontrol and '''l'''ife '''s'''upport '''s'''ystem
+
* SLF - shuttle landing facility, see [[Cape Canaveral]]
;EELV:Evolved Expendable Launch Vehicle
+
* SMa - [[semi-major axis]]  
;ESA:[[European Space Agency]]
+
* SSME - Space Shuttle Main Engines
;ESAS:[[w:Exploration Systems Architecture Study|Exploration Systems Architecture Study]]
+
* SMi - [[semi-minor axis]]
;ET:[[external tank]]
+
* SRB - Solid Rocket Booster
;EQU:plane of the [[equator]]
+
* SSTO - [[Single_Stage_To_Orbit | Single Stage to Orbit]]
;EVA:'''E'''xtra '''v'''ehicular '''a'''ctivity, see [[EVA]]
+
* STP - static [[pressure]] or [[Stone Temple Pilots]]
 
+
* STS - space transportation system, [[space shuttle]]
=F=
+
* Tgt - target, esp. in [[docking]] mode
;FGB:Russian abbreviation for Functional Cargo Block. See [[FGB]]
+
* Tg-ToR - target [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
;FoV:field of view, as seen in the [[general information display]]
+
* T - orbit period, measured in seconds
;FPS:[[frame rate]] (frames per second), as seen in the [[general information display]]
+
* TAS - true air speed [http://en.wikipedia.org/wiki/True_air_speed]
;FRF:'''F'''light '''R'''eadiness '''F'''iring, a launch countdown test of the Shuttle running all except SRB ignition and lift-off.
+
* TKS - russian spacecraft for the Almaz program, see [[TKS]]
 
+
* TLe - eject longitude, as seen on the [[transfer MFD]]
=G=
+
* TLi - intercept longitude, as seen on the [[transfer MFD]]
;g:a unit of acceleration. 1g equals the gravity acceleration on earths surface, 9.81 m/s²
+
* Tn - time to node, as seen on the [[align orbital plane MFD]]
;GL:Used often as vehicle name prefix for a [[Delta-glider]]
+
* TOFS - tangential offset [[docking MFD]]
;GET:'''G'''round '''E'''lapsed '''T'''ime [http://history.nasa.gov/SP-4029/Apollo_00c_Introduction.htm]
+
* TrA - [[true anomaly]]
;GLOC:'''G'''ravity-induced '''L'''oss '''o'''f '''C'''onsciousness 
+
* TrL - [[true longitude]]
;GMT:Greenwich Mean Time.See [[w:Universal Time|Universal Time on Wikipedia]]
+
* Ts - length of siderial day
;GPDS:[[GPDS|Generic Payload Description System]]
+
* Tth - predicted thrust time, as seen on the [[align orbital plane MFD]]
;GPS:'''G'''lobal '''P'''ositioning '''S'''ystem
+
* TVEL - tangential [[velocity]]
;GS:[[ground speed]]
+
* 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.
;GTO:[[GTO|'''g'''eostationary '''t'''ransfer '''o'''rbit]]
+
* VASI - Visual Approach Slope Indicator, the glideslope lighting system ajacent to runways to guide pilots onto the correct angle of glideslope (normally 3 degrees).
 
+
* VC - virtual cockpit
=H=
+
* Vel - [[velocity]]
;H:Horizon
+
* VOR - [[very high frequency omnidirectional radio]]
;HAC:[[Heading Alignment Cone]]
+
* VS - vertical speed
;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
+
* VTOL - Vertical Take Off and Landing
;HUD:[[heads up display]]
+
* STOVL - Short take-off, vertical landing. As performed by the DG on full fuel employing hover thrusters during takeoff.
;HSI:[[horizontal situation indicator]]
+
* Wrp - time acceleration factor, seen in the [[general information display]]
;HST:[[Hubble Space Telescope]]
+
* XPDR - [[transponder]]
;HTO:[[hypothetical transfer orbit]], as seen on the [[transfer MFD]]
+
* ZM - zoom, as seen on the [[map 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 (http://en.wikipedia.org/wiki/Inclination)
 
;ISP:[[specific impulse]]
 
;ISS:[[International Space Station]]
 
 
 
=J=
 
;JD:[[Julian date]]
 
;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=
 
;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:metre
 
;M:Mega (SI prefix for 10<sup>6</sup>). 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
 
;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:multifunction display, see [[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]]
 
;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]]
 
;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:[[orbital speed]]
 
 
 
=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
 
;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
 
 
 
=Q=
 
;QR: '''q'''ualification '''r'''eview
 
 
 
=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]]
 
;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]]
 
;RG:[[retrograde]]
 
;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.
 
 
 
=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]]
 
;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]]
 
;SI unit: The metric system of measurement, the modern name, see [[SI unit]]
 
;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, 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.
 
;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
 
=Z=
 
;ZM:zoom, as seen on the [[map MFD]]
 
 
 
{{compactTOC}}
 
 
 
[[Category: Articles]]
 
[[Category:Glossary]]
 

Please note that all contributions to OrbiterWiki are considered to be released under the GNU Free Documentation License 1.2 (see OrbiterWiki:Copyrights for details). If you do not want your writing to be edited mercilessly and redistributed at will, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. Do not submit copyrighted work without permission!

To protect the wiki against automated edit spam, we kindly ask you to solve the following hCaptcha:

Cancel Editing help (opens in new window)

Templates used on this page: