| Acronym | Meaning |
| MSFC | Marshall Space Flight Center |
| SSBUV | Shuttle Solar Backscatter Ultraviolet Experiment |
| RG | Red Giant |
| GRTLS | Glide RTLS |
| IAPPP | International Amateur/Professional Photoelectric Photometry |
| REM | Rat Enclosure Module |
| ERS | Earth Resources Satellite |
| PMT | PhotoMultiplier Tube |
| VECO | Vernier Engine Cutoff |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |