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Orbiter Acronyms
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ATM - Atmosphere AOA - Angle of Attack COM – Communications CSM – Command Service Module
EMU - Extra Vehicle Maneuvering Unit ET - External Tank FOV – Field of View
HAC - cylinder HTO - Hypothetical Transfer Orbit HUD – Heads-up Display ILS - Instrument Landing System
IDSn- Instrument Docking System ISS – International Space Station KSC – Kennedy Space Center
LEO - Low Earth Orbit LM – Luner Module LOL – Lots of Laphs
MFD – Multifunctional Display
ME - Main Engines MECO- Main Engine Cut Off MJD - Modified Julian Date MMU - Manned Maneuvering Unit
PAPI - Precision Approach Path Indicator VASI - Visual Approach Slope Indicator
NDB - Receiver (Non-Directional Beacon, a.k.a radio compass) OMS- Orbiter Maneuvering System RCS- Reaction Control System SRB- Solid Rocket Booster TLI - Tank Level Indicator
UT - Universal Time VOR - Very High Frequency Omnidirection Range VTOL - Vertical Take-Off & Landing
Abbreviations for Spacecraft Elements:
Sma - Semi-major axis Smi- Semi-minor axis
PeD - Periapsis distance ApD - Apoapsis distance Rad - Radial distance Ecc - Eccentricity T - Orbit period PeT - Time to periapsis passage ApT - Time to apoapsis passage Vel - Velocity
Inc - Inclination LAN - Longitude of asc. node Lpe - Longitude of periapsis AgP - Argument of periapsis TrA - True anomaly TrL - True longitude MnA - Mean anomaly MnL - Mean longitude
TLe: True longitude of orbit ejection point DT
e: Time to ejection point [s] Dv: Velocity difference resulting from ejection burn [m/s] TLi: True longitude of interception with target orbit (if applicable) DT
i: Time to interception with target orbit [s] (if applicable)
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