| Acronym | Meaning |
 | IC | Index Catalog |
| SAT | Synthetic Aperture Telescope |
| SAMPEX | Solar Anomalous And Magnetospheric Particle EXplorer |
| MMT | Multiple Mirror Telescope |
| SAR | Search And Rescue / Synthetic Aperture Radar |
| M | Messier |
| ACRIM | ACR Irradiance Monitor |
| GOMOS | Global Ozone Monitoring By Occultation Of Stars |
| GPS | Global Positioning System |
| MRIR | Medium Resolution Infrared Radiometer |
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