| Acronym | Meaning |
 | ASTRO | Space Astrophysics Laboratory |
| SCA | Shuttle Carrier Aircraft |
| VLT | Very Large Telescope |
| ISRO | Indian Space Research Organisation |
| SSPF | Space Station Processing Facility |
| SID | Sudden Ionospheric Disturbance |
| ISEP | Isolated/Stabilized Exercise Platform |
| SNG | Sodruzhestva Nezabisimikh Gosudarst |
| SCT | Schmidt-Cassegrain Telescope |
| NRAO | National Radio Astronomy Observatory |
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