| Acronym | Meaning |
| GEM | Graphite Epoxy Motor |
| SSO | Spurious Shut-off |
| RCT | Radiometric Calibration Target |
| LHA | Local Hour Angle |
| ERS | Environmental Research Satellite |
| GEODSS | Ground-based Electro-optical Deep-space Surveillance System |
| GPC | General Purpose Computer |
| MODIS-N | MODIS-Nadir |
| HRSI | High-temperature Reusable Surface Insulation |
| DSO | Detailed Supplementary Objective |