Difference between revisions of "List of Acronyms and Abbreviations"

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This list contains definitions for [[Orbiter]] or important [[spaceflight]] acronyms or abbreviations, especially those appearing in [[MFD|MFDs]] and various [[HUD]] modes.
+
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:
 
One entry in this list consists of a term with one or more definitions, like:
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;AOA: Angle of attack, the difference between the ship's direction of travel and the pitch of its nose
 
;AOA: Angle of attack, the difference between the ship's direction of travel and the pitch of its nose
 
#Used in [[Surface MFD]] to indicate the angle of attack
 
#Used in [[Surface MFD]] to indicate the angle of attack
−
;AORP:'''A'''utonomous '''O'''rbiter '''R'''apid '''P'''rototype, a system to allow a [[STS|shuttle]] orbiter to land without [[crew]].
+
;AORP:'''A'''utonomous '''O'''rbiter '''R'''apid '''P'''rototype, a system to allow a [[STS|shuttle]] orbiter to land without crew.
 
;AP: Used in [[Surface MFD]], a red rectangle with white "AP" in the altitude tape to indicate the altitude of the ship's apoapsis
 
;AP: Used in [[Surface MFD]], a red rectangle with white "AP" in the altitude tape to indicate the altitude of the ship's apoapsis
 
;ApA:[[apoapsis]] apoapsis altitude, the lowest altitude of an orbit, displayed in [[Orbit MFD]].
 
;ApA:[[apoapsis]] apoapsis altitude, the lowest altitude of an orbit, displayed in [[Orbit MFD]].
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=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, the yellow arrow in the [[Horizontal Situation Indicator MFD]]
 
;CDR:
 
;CDR:
 
#commander
 
#commander
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;CTRL:Control
 
;CTRL:Control
 
;CTV:
 
;CTV:
−
#'''C'''rew '''T'''ransfer '''V'''ehicle, a manned spacecraft derived from the [[ATV]], see [[CTV]]
+
#'''C'''rew '''T'''ransfer '''V'''ehicle, a manned spacecraft derived from the [[ATV]], see CTV
 
#'''C'''ompatibility '''T'''est '''V'''an, '''NASA'''
 
#'''C'''ompatibility '''T'''est '''V'''an, '''NASA'''
 
;CUR: Command button in [[RCS attitude MFD]] to set the programmed attitude to the current attitude
 
;CUR: Command button in [[RCS attitude MFD]] to set the programmed attitude to the current attitude
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;Dist:'''dist'''ance
 
;Dist:'''dist'''ance
 
#Displayed in [[Sync MFD]], distance ship to target
 
#Displayed in [[Sync MFD]], distance ship to target
−
;DIV:[[divergent]], i.e. [[yaw]] [[gimbal]] mode.
+
;DIV: divergent, i.e. [[yaw]] [[gimbal]] mode.
 
;DLng:difference in longitude between ship and target, displayed in [[Sync MFD]]
 
;DLng:difference in longitude between ship and target, displayed in [[Sync MFD]]
 
;DN:
 
;DN:
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#Distance (to target), used in the [[Horizontal Situation Indicator MFD]] to indicate distance to the selected ILS or VOR transmitter
 
#Distance (to target), used in the [[Horizontal Situation Indicator MFD]] to indicate distance to the selected ILS or VOR transmitter
 
#Distance, used in [[Orbit MFD]] to select between Rad, ApR, PeR (distance from body center) and Alt, ApA, PeA (distance from body surface)
 
#Distance, used in [[Orbit MFD]] to select between Rad, ApR, PeR (distance from body center) and Alt, ApA, PeA (distance from body surface)
−
;DTe:time to [[ejection]], as seen on the [[transfer MFD]]
+
;DTe:time to ejection, displayed in [[Transfer MFD]]
−
;DTi:time to intercept, as seen on the [[transfer MFD]]
+
;DTi:time to intercept, displayed in [[Transfer MFD]]
 
;DTmin:time of arrival difference
 
;DTmin:time of arrival difference
 
#Displayed in [[Sync MFD]] to indicate difference in time between ship and target passing the intersection point
 
#Displayed in [[Sync MFD]] to indicate difference in time between ship and target passing the intersection point
−
;Dv:delta [[velocity]], as seen on the [[transfer MFD]], see also [[Delta-V]]
+
;Dv:delta [[velocity]], command button in [[Transfer MFD]] to increase or decrease the delta-v of the HTO; see also [[Delta-V]]
  
 
[[#top|Back to top]]
 
[[#top|Back to top]]
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;ECSS:'''e'''uropean '''c'''ooperation for '''s'''pace '''s'''tandardization
 
;ECSS:'''e'''uropean '''c'''ooperation for '''s'''pace '''s'''tandardization
 
;EELV:Evolved Expendable Launch Vehicle
 
;EELV:Evolved Expendable Launch Vehicle
 +
;EJ+ and EJ-: Command buttons in [[Transfer MFD]] to increase or decrease the longitude of orbit ejection
 
;ELS: '''EL'''ements, custom '''S'''elect, used in [[Align MFD]] to select a custom orbital elements to which to align
 
;ELS: '''EL'''ements, custom '''S'''elect, used in [[Align MFD]] to select a custom orbital elements to which to align
 
;END: command button in [[RCS attitude MFD]] to stop the programmed attitude mode
 
;END: command button in [[RCS attitude MFD]] to stop the programmed attitude mode
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=F=
 
=F=
−
;FGB:Russian abbreviation 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]]
+
;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]] (frames per second), as seen in the general information display
 
;FRF:'''F'''light '''R'''eadiness '''F'''iring, a launch countdown test of the Shuttle running all except SRB ignition and lift-off.
 
;FRF:'''F'''light '''R'''eadiness '''F'''iring, a launch countdown test of the Shuttle running all except SRB ignition and lift-off.
 
;FRM: '''Fr'''a'''m'''e of reference, used in [[Orbit MFD]] to change the orbital display and parameters between Equatorial or Ecliptic
 
;FRM: '''Fr'''a'''m'''e of reference, used in [[Orbit MFD]] to change the orbital display and parameters between Equatorial or Ecliptic
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;HAC:[[Heading Alignment Cone]]
 
;HAC:[[Heading Alignment Cone]]
 
;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
 
;HLLV:'''h'''eavy '''l'''ift '''l'''aunch '''v'''ehicle
−
;HSI:[[horizontal situation indicator]]
+
;HSI:[[Horizontal Situation Indicator MFD|horizontal situation indicator]]
 
;HST:[[Hubble Space Telescope]]
 
;HST:[[Hubble Space Telescope]]
−
;HTO:[[hypothetical transfer orbit]], as seen on the [[transfer MFD]]
+
;HTO:hypothetical transfer orbit, command button in [[Transfer MFD]] to display HTO parameters
 
;HUD:[[heads up display]], used in [[Docking MFD]], [[Orbit MFD]], [[Surface MFD]] to copy the current parameters to the HUD
 
;HUD:[[heads up display]], used in [[Docking MFD]], [[Orbit MFD]], [[Surface MFD]] to copy the current parameters to the HUD
  
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;IDS:[[IDS|instrument docking system]], used in [[Docking MFD]]
 
;IDS:[[IDS|instrument docking system]], used in [[Docking MFD]]
 
;ILS:
 
;ILS:
−
#[[instrument landing system]]
+
#Instrument Landing System
 
#also used in [[Horizontal Situation Indicator MFD]] to indicate which runway at which Spaceport is selected by the NAV system
 
#also used in [[Horizontal Situation Indicator MFD]] to indicate which runway at which Spaceport is selected by the NAV system
 
#'''I'''nternational '''l'''aunch '''s'''ervices, a US-russian joint venture marketing [[Atlas]] and [[Proton]] launches
 
#'''I'''nternational '''l'''aunch '''s'''ervices, a US-russian joint venture marketing [[Atlas]] and [[Proton]] launches
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[[#top|Back to top]]
 
[[#top|Back to top]]
 
=J=
 
=J=
−
;JD:[[Julian date]]
+
;JD:Julian date
 
;JSC:  Lyndon B. '''J'''ohnson '''S'''pace '''C'''enter
 
;JSC:  Lyndon B. '''J'''ohnson '''S'''pace '''C'''enter
 
;JWST:'''J'''ames '''W'''ebb '''S'''pace '''T'''elescope
 
;JWST:'''J'''ames '''W'''ebb '''S'''pace '''T'''elescope
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;MFD:'''M'''ulti'''f'''unctional '''D'''isplay, see [[MFD]]
 
;MFD:'''M'''ulti'''f'''unctional '''D'''isplay, see [[MFD]]
 
;MHz: '''M'''ega'''H'''er'''z''', same as the old term megacycles/second, radio and transponder frequency, used in [[COMNAV MFD]]
 
;MHz: '''M'''ega'''H'''er'''z''', same as the old term megacycles/second, radio and transponder frequency, used in [[COMNAV MFD]]
−
;MJD:[[modified Julian date]]
+
;MJD:[[modified julian date]]
−
;MLP:[[Mobile Launcher Platform]]
+
;MLP:Mobile Launcher Platform
 
;MMOD:'''M'''icro'''m'''eteorites and '''o'''rbital '''d'''ebris
 
;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]]
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##in [[RCS attitude MFD]] command button in Docking mode to slave one of the Nav receivers to this MFD
 
##in [[RCS attitude MFD]] command button in Docking mode to slave one of the Nav receivers to this MFD
 
#navigation
 
#navigation
−
#[[navigation aid]]
+
#navigation aid
−
;NT: '''N'''o '''t'''arget, used in [[Orbit MFD]] to deselect the target
+
;NT: '''N'''o '''t'''arget, used in [[Orbit MFD]] and [[Transfer MFD]] to deselect the target
 +
;NUM: Comand button in [[Transfer MFD]] to select the number of steps to use in the HTO calculation
  
 
[[#top|Back to top]]
 
[[#top|Back to top]]
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#Orbit, displayed in [[Sync MFD]] indicates how many orbits remaining until rendezvous
 
#Orbit, displayed in [[Sync MFD]] indicates how many orbits remaining until rendezvous
 
;OB+ and OB-: '''O'''mni'''B'''earing, used to change the offset of the course arrow to left or right of the beam
 
;OB+ and OB-: '''O'''mni'''B'''earing, used to change the offset of the course arrow to left or right of the beam
−
;OBS:[[omni bearing selector]]
+
;OBS:omni bearing selector, the yellow arrow in the [[Horizontal Situation Indicator MFD]]
−
;OBT:[[orbit]], as seen on the [[orbit MFD]]
+
;OBT:[[orbit]], displayed in [[Orbit MFD]]
 
;OMBUU: '''O'''rbiter '''M'''id'''b'''ody '''U'''mbilical '''U'''nit
 
;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.
+
;OMP:'''O'''rbiter '''M'''ultiplayer '''P'''roject, an ongoing program to create a multiplayer server in Orbiter, see [[OMP]].
 
;OMS:'''O'''rbital '''M'''aneuvering '''S'''ystem, the 'main engines' of the [[space shuttle]] orbiter
 
;OMS:'''O'''rbital '''M'''aneuvering '''S'''ystem, the 'main engines' of the [[space shuttle]] orbiter
 
;OS:[[w:Orbital speed|Orbital speed]]
 
;OS:[[w:Orbital speed|Orbital speed]]
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[[#top|Back to top]]
 
[[#top|Back to top]]
 
=P=
 
=P=
−
;P:position (sometimes radius) vector, as seen on the [[align orbital plane MFD]]
+
;P:position (sometimes radius) vector, displayed in the [[Align 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]]
 
;PAM:'''P'''ayload '''A'''ssist '''M'''odule, a family of solid upper stages for the [[Space Shuttle]]
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;PeT:time to [[periapsis]] in seconds, displayed in [[Orbit MFD]]
 
;PeT:time to [[periapsis]] in seconds, displayed in [[Orbit MFD]]
 
;PG:
 
;PG:
−
#Page, switching displayed pages in an MFD mode, used in [[Align MFD]]
+
#Page, switching displayed pages in an MFD mode, used in [[Align MFD]] and [[Ascent profile MFD]]
 
#[[prograde]]
 
#[[prograde]]
 
;PLT:Pilot
 
;PLT:Pilot
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#radial distance
 
#radial distance
 
#angular unit ''radians''
 
#angular unit ''radians''
−
;RAnm:[[true anomaly]] of reference axis, displayed in [[synchronise orbit MFD]]
+
;RAnm:[[true anomaly]] of reference axis, displayed in [[Sync MFD]]
 
;Rate: How fast the current orbital plane is changing, degrees per second, used in [[Align MFD]]
 
;Rate: How fast the current orbital plane is changing, degrees per second, used in [[Align MFD]]
 
;RCS:[[reaction control system]], spacebourne orientation rocket system.
 
;RCS:[[reaction control system]], spacebourne orientation rocket system.
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;RDT&E:'''r'''esearch, '''d'''evelopment, '''t'''esting and '''e'''valuation
 
;RDT&E:'''r'''esearch, '''d'''evelopment, '''t'''esting and '''e'''valuation
 
;REF: '''Reference'''
 
;REF: '''Reference'''
−
#used in [[Align MFD]], [[Map MFD]], [[Orbit MFD]] to select a reference body.
+
#used in [[Align MFD]], [[Map MFD]], [[Orbit MFD]] and [[Transfer MFD]] to select a reference body.
 
#'''Ref''': Reference displayed in [[Sync MFD]] to switch Reference axis
 
#'''Ref''': Reference displayed in [[Sync MFD]] to switch Reference axis
 
;RG:[[retrograde]]
 
;RG:[[retrograde]]
−
;RInc:[[relative inclination]], relative inclination between the ship and target orbits, used in [[Align MFD]] and [[Sync MFD]]
+
;RInc:[[relative inclination]], relative inclination between the ship and target orbits, used in [[Align MFD]], [[Sync MFD]], and [[Transfer MFD]]
 
;RKA:Russian Space Agency
 
;RKA:Russian Space Agency
 
;RMS:'''R'''emote '''M'''anipulator '''S'''ystem
 
;RMS:'''R'''emote '''M'''anipulator '''S'''ystem
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;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]]
 
;S/C: [[spacecraft|'''s'''pace'''c'''raft]]
 
;SC< and SC>:'''SC'''an frequency up or down in the currently selected receiver, used in [[COMNAV MFD]]
 
;SC< and SC>:'''SC'''an frequency up or down in the currently selected receiver, used in [[COMNAV MFD]]
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;SHP: Ship, used in [[Map MFD]] to indicate your ship's name, position, altitude, course of your ship
 
;SHP: Ship, used in [[Map MFD]] to indicate your ship's name, position, altitude, course of your ship
 
;Sim:
 
;Sim:
−
#simulation time (in seconds), as seen in the [[general information display]]
+
#simulation time (in seconds), as seen in the general information display
 
#a common abbreviation for "simulator"
 
#a common abbreviation for "simulator"
−
;Sh-ToR:ship [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
+
;Sh-ToR: ship's time on reference, displayed in [[Sync MFD]] to indicate the number of seconds until the ship crosses the reference axis
 
;SI unit: The metric system of measurement, the modern name, see [[SI unit]]
 
;SI unit: The metric system of measurement, the modern name, see [[SI unit]]
 
;SL+ and SL-: '''S'''e'''l'''ect, change which receiver to next or previous receiver to adjust frequency, used in [[COMNAV MFD]]
 
;SL+ and SL-: '''S'''e'''l'''ect, change which receiver to next or previous receiver to adjust frequency, used in [[COMNAV MFD]]
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;SMi:[[semi-minor axis]], used in [[Orbit MFD]]
 
;SMi:[[semi-minor axis]], used in [[Orbit MFD]]
 
;SRB:'''S'''olid '''R'''ocket '''B'''ooster [http://en.wikipedia.org/wiki/Solid_rocket_booster]
 
;SRB:'''S'''olid '''R'''ocket '''B'''ooster [http://en.wikipedia.org/wiki/Solid_rocket_booster]
 +
;SRC: Source, command button in [[Transfer MFD]] to select the source body or vessel
 
;SRTM:'''S'''huttle '''r'''adar '''t'''opography '''m'''ission, see [[SRTM]].
 
;SRTM:'''S'''huttle '''r'''adar '''t'''opography '''m'''ission, see [[SRTM]].
 
;SSME:Space Shuttle Main Engines [http://en.wikipedia.org/wiki/SSME_%28rocket_engine%29]
 
;SSME:Space Shuttle Main Engines [http://en.wikipedia.org/wiki/SSME_%28rocket_engine%29]
Line 386: Line 389:
 
;STP:static [[pressure]], given in Pa
 
;STP:static [[pressure]], given in Pa
 
#Displayed in [[Surface MFD]] to indicate atmospheric pressure
 
#Displayed in [[Surface MFD]] to indicate atmospheric pressure
 +
;Stp: Command button in [[Transfer MFD]] to select the number of calculation steps to be used in the HTO calculation
 
;STS:'''s'''pace '''t'''ransportation '''s'''ystem, AKA space shuttle, see [[space transportation system]]
 
;STS:'''s'''pace '''t'''ransportation '''s'''ystem, AKA space shuttle, see [[space transportation system]]
 
;SUS: command button in [[RCS attitude MFD]] to suspend programmed attitude temporarily
 
;SUS: command button in [[RCS attitude MFD]] to suspend programmed attitude temporarily
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=T=
 
=T=
  
−
;T:orbit period, measured in seconds, displayed in [[Orbit MFD]]
+
;T:
 +
#Orbit period, measured in seconds, displayed in [[Orbit MFD]]
 +
#Displayed in [[Transfer MFD]] to indicate the estimated time elapsed in the HTO calculations
 
;TAEM:Terminal Area Energy Management
 
;TAEM:Terminal Area Energy Management
 
;TAS:true air speed [[w:True airspeed|True airspeed]]
 
;TAS:true air speed [[w:True airspeed|True airspeed]]
Line 399: Line 405:
 
;TEI:'''T'''rans '''E'''arth '''I'''njection[http://en.wikipedia.org/wiki/Trans_Earth_Injection]  
 
;TEI:'''T'''rans '''E'''arth '''I'''njection[http://en.wikipedia.org/wiki/Trans_Earth_Injection]  
 
;TGT:'''T'''ar'''G'''e'''T'''  
 
;TGT:'''T'''ar'''G'''e'''T'''  
−
#command button used in [[Align MFD]], [[Docking MFD]], [[Map MFD]], [[Orbit MFD]], and [[Sync MFD]] to select a target
+
#command button used in [[Align MFD]], [[Docking MFD]], [[Map MFD]], [[Orbit MFD]], [[Sync MFD]], and [[Transfer MFD]] to select a target
 
#used in the [[Map MFD]] display to indicate target name, position, altitude of the target
 
#used in the [[Map MFD]] display to indicate target name, position, altitude of the target
−
;Tg-ToR:target [[time-on-reference]], as seen on the [[synchronise orbit MFD]]
+
;Tg-ToR: Target's's time on reference, displayed in [[Sync MFD]] to indicate the number of seconds until the target crosses the reference axis
 
;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.
 
;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, displayed in [[Transfer MFD]]
−
;TLi:intercept longitude, as seen on the [[transfer MFD]]
+
;TLi:intercept longitude, displayed in [[Transfer MFD]]
 
;TLI:Trans Lunar Injection
 
;TLI:Trans Lunar Injection
 
;Tn:'''T'''ime to '''n'''ode, used in [[Align MFD]]
 
;Tn:'''T'''ime to '''n'''ode, used in [[Align MFD]]
−
;TOFS:tangential offset [[docking MFD]]
+
;TOFS:tangential offset [[Docking MFD]]
 
;ToR: time on reference axis, displayed in [[Sync MFD]] to indicate number of seconds until ship or target passes the intersection point
 
;ToR: time on reference axis, displayed in [[Sync MFD]] to indicate number of seconds until ship or target passes the intersection point
 
;TrA:[[true anomaly]], displayed in [[Orbit MFD]]
 
;TrA:[[true anomaly]], displayed in [[Orbit MFD]]
−
;TRK:Track, used in [[map MFD]] to keep the ship centered in the map display
+
;TRK:Track, used in [[Map MFD]] to keep the ship centered in the map display
−
;TrL:[[true longitude]], displayed in [[Orbit MFD]]
+
;TrL:[[true longitude]], displayed in [[Orbit MFD]] and [[Transfer MFD]]
 
;TRL:'''t'''echnology '''r'''eadiness '''l'''evel
 
;TRL:'''t'''echnology '''r'''eadiness '''l'''evel
 
;Ts:length of siderial day
 
;Ts:length of siderial day
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#'''UP''', used in [[Map MFD]] when Track mode is off and map is zoomed in to scroll the map up to see farther North
 
#'''UP''', used in [[Map MFD]] when Track mode is off and map is zoomed in to scroll the map up to see farther North
 
#Command button in [[RCS attitude MFD]] to change the selected modification up so you can edit it
 
#Command button in [[RCS attitude MFD]] to change the selected modification up so you can edit it
−
;UT:'''u'''niversal '''t'''ime, GMT. Not to be confused with [[UTC]] (Universial Time Co-ordinated). The latter is based on atomic clocks not astronomy, hence the occasional ''leap-second'' to correct UTC to GMT.
+
;UPD: Command button in [[Transfer MFD]] to restart the HTO calculation
 +
;UT:'''u'''niversal '''t'''ime, GMT. Not to be confused with UTC (Universial Time Co-ordinated). The latter is based on atomic clocks not astronomy, hence the occasional ''leap-second'' to correct UTC to GMT.
  
 
[[#top|Back to top]]
 
[[#top|Back to top]]
Line 455: Line 462:
 
;WBS:'''w'''ork '''b'''reakdown '''s'''tructure
 
;WBS:'''w'''ork '''b'''reakdown '''s'''tructure
 
;WPD:'''w'''ork '''p'''ackage '''d'''escription
 
;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]], used in [[Docking MFD]]
 
;XPDR:[[transponder]], used in [[Docking MFD]]

Latest revision as of 13:20, 22 December 2024

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

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

Term
Definition
;Term:Definition

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

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

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

The order of the definitions should be like that:

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

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

See also[edit]

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


A[edit]

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

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B[edit]

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

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C[edit]

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

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D[edit]

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

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E[edit]

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

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F[edit]

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

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G[edit]

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

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H[edit]

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

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I[edit]

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

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J[edit]

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


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K[edit]

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

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L[edit]

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

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M[edit]

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


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N[edit]

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

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O[edit]

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

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P[edit]

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

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Q[edit]

QR
qualification review

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R[edit]

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

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S[edit]

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

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T[edit]

T
  1. Orbit period, measured in seconds, displayed in Orbit MFD
  2. Displayed in Transfer MFD to indicate the estimated time elapsed in the HTO calculations
TAEM
Terminal Area Energy Management
TAS
true air speed True airspeed
  1. Command button in Surface MFD to set the speed tape to TAS
TEI
Trans Earth Injection[7]
TGT
TarGeT
  1. command button used in Align MFD, Docking MFD, Map MFD, Orbit MFD, Sync MFD, and Transfer MFD to select a target
  2. used in the Map MFD display to indicate target name, position, altitude of the target
Tg-ToR
Target's's time on reference, displayed in Sync MFD to indicate the number of seconds until the target crosses the reference axis
TKS
russian spacecraft for the Almaz program, see TKS
TLA
Three letter acronym for a three letter acronym.
TLE
two-line elements
TLe
eject longitude, displayed in Transfer MFD
TLi
intercept longitude, displayed in Transfer MFD
TLI
Trans Lunar Injection
Tn
Time to node, used in Align MFD
TOFS
tangential offset Docking MFD
ToR
time on reference axis, displayed in Sync MFD to indicate number of seconds until ship or target passes the intersection point
TrA
true anomaly, displayed in Orbit MFD
TRK
Track, used in Map MFD to keep the ship centered in the map display
TrL
true longitude, displayed in Orbit MFD and Transfer MFD
TRL
technology readiness level
Ts
length of siderial day
TthA
Estimated thrust time at the ascending node to align planes, used in Align MFD
TthD
Estimated thrust time at the descending node to align planes, used in Align MFD
TVEL
tangential velocity

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U[edit]

UMMU
Universal manned maneuvering unit, popular add-on, see Universal MMU.
UNKS
unknown problems, you are aware of.
UNK-UNKS
unknown problems, you are not aware of.
UP
  1. UP, used in Map MFD when Track mode is off and map is zoomed in to scroll the map up to see farther North
  2. Command button in RCS attitude MFD to change the selected modification up so you can edit it
UPD
Command button in Transfer MFD to restart the HTO calculation
UT
universal time, GMT. Not to be confused with UTC (Universial Time Co-ordinated). The latter is based on atomic clocks not astronomy, hence the occasional leap-second to correct UTC to GMT.

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V[edit]

+V and -V
Used in RCS attitude MFD to add or subtract one degree each click the programmed attitude mode
VACC
Vertical acceleration, used in Surface MFD how fast rate of ascent or descent is increasing or decreasing in m/s2
VASI
Visual Approach Slope Indicator, the glideslope lighting system ajacent to runways to guide pilots onto the correct angle of glideslope (normally 3 degrees).
VC
  1. virtual cockpit
  2. Visual C++, an IDE and C++ compiler by Microsoft.
Vel
velocity, displayed in Orbit MFD
VOR
  1. very high frequency omnidirectional radio
  2. used in the Horizontal Situation Indicator MFD to indicate which VOR transmitter is selected by a NAV radio, if it's selected to a VOR transmitter
VRR
Velocity Radial Range, used to manually set the range in the Radial Velocity graph in Ascent profile MFD
VS
vertical speed
  1. Used in Surface MFD to indicate rate of ascent or descent in meters per second
VSA
Virtual Space Agency
VSI
Vertical Speed Indicator, used in Surface MFD, the VS tape reading rate of ascent or descent, in m/s
VTOL
Vertical Take Off and Landing
VTR
Velocity Tangential Range, used to manually set the range in the Tangential Velocity Range graph in Ascent profile MFD

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W[edit]

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

X[edit]

XPDR
transponder, used in Docking MFD

Y[edit]

YSC
Yokohama Science Center

Z[edit]

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

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

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