Spacecraft Abbreviations and Acronyms

1. POF
   Phase of Flight
2. PORT
   Post-Landing Orion Recovery Test
3. POS
   Position
4. POSIT
   Position
5. POSN
   Position
6. PRA
   Pre-Recordei Announcement
7. PRA
   Pre-Recorded Announcement
8. PSN
   Position
9. PSR
   Primary Surveillance Radar
10. PSS
    Power Supply System
11. PSU
    Passenger Service Unit
12. PTV
    Paraahute Test Vehicle
13. PVO
    Pioneer Venus Orbiter
14. PWPF
    Pulse-Width Pulse-Frequency
15. PWS
    Plasma Wave Subsystem
16. QAR
    Quick Access Recorder
17. QNH
    Barometric Pressure Adjusted To Sea Level
18. QRH
    Quick Reference Handbook
19. RA
    Resolution Advisory
20. RA
    Range

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