| Acronym | Meaning |
 | HRTS | High-resolution Telescope Spectrograph |
| EO-ICWG | Earth Observation International Coordination Working Group |
| PSI | Plan Shear Indicator |
| PC | Geomagnetic Pulsations |
| DORIS | Doppler Orbitography & Radiopositioning Integrated By Satellite |
| PSA | Public Service Announcement (radio/TV Term) |
| FIAR | European Aviation Partnership |
| AMWG | Atmosphere Model Working Group |
| MAC | Multiple Access Computer |
| NASA | National Aeronautics And Space Administration |
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