| Acronym | Meaning |
 | SID | Sudden Ionospheric Disturbance |
| NRAO | National Radio Astronomy Observatory |
| ANSI | American National Standards Institute |
| TKSC | Tsukuba Space Center |
| MRO | Memory Read-Out |
| ECS | Environmental Control System |
| DOE | Department Of The Environment |
| TSPK | Tsentr Podgotovka Kosmonavti |
| ASCO | Arab Satellite Communications Organization |
| BATSE | Burst And Transient Source Experiment |
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