| Acronym | Meaning |
 | PPM | Positions And Proper Motions (catalog) |
| SEST | Swedish ESO Submillimeter Telescope |
| SSRMS | Space Station Remote Manipulator System |
| ETE | End-to-End |
| CSA | Canadian Space Agency |
| LDEF | Long Duration Exposure Facility |
| NRO | National Reconnaissance Office |
| SLAP | Space Link Access Protocol |
| MFV | Main Fuel Valve |
| SR | Special Relativity |
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