NASA Abbreviations and Acronyms

1. HFMU
   High-Fidelity Mockup
2. HFO
   high-frequency oscillator
3. HFP
   Hardened Focal Plane
4. HFR
   High Focal Ratio Mode
5. HFRA
   High-Frequency Recovery Antenna
6. HFRM
   High Focal Ratio Mode
7. HFRW
   High-Frequency Resistance Welding
8. HFT
   Horizontal Flight Test
9. HFTE
   Human Factors Test and Engineering
10. HFTF
    Horizontal Flight Test Facility
11. HFTS
    Horizontal Flight Test Simulator
12. HFX
    high-frequency transceiver
13. HG
    Mercury
14. HG
    High Gain
15. HGA
    High Gain Antenna
16. HGA
    High-Gain Antenna
17. HGAS
    High-Gain Antenna System
18. HGAS
    High Gain Antenna System
19. HGBU
    High Gyro Bias Updates
20. HGCDTE
    Mercury-Cadmium-Telluride

Last updated: May 6, 2025 — Total entries: 14,020