| Acronym | Meaning |
 | F | Frequency |
| ADF | Advanced Development Facility |
| QSO | Quasi-stellar Object |
| PACX | Private Automatic Computer Exchange |
| NRL | Naval Research Laboratory |
| NLDN | National Lightning Detection Network |
| ZWA | Zonal Wind Anomaly |
| BIT | Built-in Test |
| PAC | Polar Atmospheric Chemistry |
| HMS | High-altitude Multispectral Sounder |
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