| Acronym | Meaning |
 | AGU | American Geophysical Union |
| GUGK | Glavnoye Upravileniye Geodesii I Kartografii |
| EDC | EROS Data Center |
| GST | Greenwich Sidereal Time |
| DARPA | Defense Advanced Research Projects Agency |
| OSCAR | Orbiting Satellite Carrying Amateur Radio |
| RFI | Radio Frequency Interference |
| AFP | Air Force Program |
| MSOCC | Multisatellite Operations Control Center |
| CFPA | Center For Particle Astrophysics (Berkeley) |
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