| Acronym | Meaning |
| OV | Orbital Vehicle |
| EOSP | Earth Observing Scanning Polarimeter |
| CRRES | Combined Release/Radiation Effects Satellite |
| EUV | Extreme UltraViolet |
| VLF | Very Low Frequency |
| USMP | United States Microgravity Payload |
| SAMS | Space Acceleration Measurement System |
| PPM | Positions And Proper Motions (catalog) |
| PMIRR | Pressure Modulated InfraRed Radiometer |
| LANL | Los Alamos National Laboratory |