| Acronym | Meaning |
| IPS | Inertial Pointing System |
| SRM | Solid Rocket Motor |
| E | Elliptical (for Galaxies) |
| SAA | South Atlantic Anomaly / Single Access Antenna |
| OSTP | Office Of Science And Technology Policy |
| TSS | Targeted Search System / Tethered Satellite System |
| HGA | High Gain Antenna |
| CREAM | Cosmic Radiation Effects And Activatiom Monitor |
| CATS | Cheap Access To Space |
| HIRIS | High Resolution Imaging Spectrometer |