| Acronym | Meaning |
 | PSF | Point Spread Function |
| RME | Radiation Monitoring Experiment |
| IAU | International Astronomical Union |
| ACRV | Assured Crew Return Vehicle |
| GEM | Graphite Epoxy Motor |
| UIT | Ultraviolet Imaging Telescope |
| GEODSS | Ground-based Electro-optical Deep-space Surveillance System |
| CASSINI | Saturn Orbiter And Titan Probe |
| OTHB | Over The Horizon Backscatter |
| SMM | Solar Maximum Mission |
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