| Acronym | Meaning |
| SIR | Shuttle Imaging Radar |
| CCDS | Centers For The Commercial Development Of Space |
| ISPM | International Solar Polar Mission |
| SMM | Solar Maximum Mission |
| NRL | Naval Research Laboratory |
| TM | Thematic Mapper |
| ACE | Advanced Composition Explorer |
| RAS | Royal Astronomical Society |
| ASEM | Assembly Of Station By EVA Methods |
| GDS | Great Dark Spot |