| Acronym | Meaning |
 | MRIR | Medium Resolution Infrared Radiometer |
| IOA | Institute Of Astronomy (Cambridge) |
| SID | Sudden Ionospheric Disturbance |
| EDO | Extended Duration Orbiter |
| RASC | Royal Astronomical Society Of Canada |
| ESOC | European Space Operations Centre |
| ARRL | American Radio Relay League |
| RSN | Radio SuperNova |
| MSU | Microwave Sounding Unit |
| IRFNA | Inhibited Red Fuming Nitric Acid |
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