Spacecraft Abbreviations and Acronyms

1. R&D
   Rate of Descent
2. SIU
   Satellite Interface Unit
3. STP
   standard temperature and pressure (0° and 1 atm)
4. tat
   True Air Temperature
5. tat
   Total Air Temperature
6. Trnsfr
   Transfer
7. R/T
   Radio Altimeter
8. MAPS
   Minimum Aviation Performance Standards
9. t
   Transmitter
10. t
    True Heading
11. MSSS
    Mode S-Specific Services
12. NAS
    National Airspace System
13. SSR
    secondary surveillance radar (ICAO/FAA)
14. T/R
    Transceiver
15. T/R
    Thrust Reverser
16. T/R
    Transmitter/Receiver
17. RAT
    Reliability Assessment Testtmtram Air Turbine
18. COMM
    Communications Society
19. S R
    Search and Rescue
20. APU
    Auxiliary Power Unit

Last updated: May 24, 2020 — Total entries: 680