| Acronym | Meaning |
 | IGM | InterGalactic Medium |
| GPPF | Gravitational Plant Physiology Facility |
| MOMS | Modular Optoelectronic Multispectral/Stereo Scanner |
| MPEC | Multi-Purpose Experiment Canister |
| SWF | ShortWave Fading |
| CITA | Canadian Institute For Theoretical Astrophysics |
| FRF | Flight Readiness Firing |
| HRI | High Resolution Imager |
| HEAO | High Energy Astronomical Observatory |
| PDS | Planetary Data System |
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