| Acronym | Meaning |
 | GST | Greenwich Sidereal Time |
| OTA | Optical Telescope Assembly |
| CM | Central Meridian |
| SIRTF | Space InfraRed Telescope Facility |
| TDRS | Tracking And Data Relay Satellite |
| PDS | Planetary Data System |
| ESOC | European Space Operations Centre |
| BBXRT | Broad-Band X-Ray Telescope |
| TSUP | Tsentr Upravileniya Polyoti |
| TDRSS | Tracking And Data Relay Satellite System |
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