| Acronym | Meaning |
 | INTELSAT | International Telecommunications Satellite |
| EODC | Earth Observation Data Centre |
| TM | Thematic Mapper |
| PTC | Passive Thermal Control |
| YSC | Yokohama Science Center |
| VICAR | Graphics Format Used By JPL |
| TOPS | Toward Other Planetary Systems |
| MACHO | MAssive Compact Halo Object |
| GEM | Giotto Extended Mission |
| PMIRR | Pressure Modulated InfraRed Radiometer |
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