| Acronym | Meaning |
| EPD | Energetic Particles Detector |
| LHA | Local Hour Angle |
| MSOCC | Multisatellite Operations Control Center |
| PEM | Payload Electronics Module |
| VLT | Very Large Telescope |
| FPD | Flight Projects Directorate |
| GUGK | Glavnoye Upravileniye Geodesii I Kartografii |
| GC | Galactic Center |
| HRSR | High-Resolution Scanning Radiometer |
| CCSDS | Consultative Committee For Space Data Systems |