| Acronym | Meaning |
 | HEAO | High Energy Astronomical Observatory |
| COMPTEL | COMPton TELescope |
| SEI | Space Exploration Initiative |
| U3P | Union Pour La Promotion De La Propulsion Photonique |
| MLS | Microwave Limb Sounder |
| GMS | Geostationary Meterological Satellite |
| DOD | Department Of Defense |
| ACR | Active Cavity Radiometer |
| AFGWC | Air Force Global Weather Center |
| SSPS | Sky Survey Prototype System |
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