| Acronym | Meaning |
| SI | Solar Interiors Section |
| AA | Activity Area |
| ADM | Atomic Demolition Munition |
| RUC | Rapid Update Cycle |
| DARPA | Defense Advanced Research Projects Agency |
| AP | Attached Payload |
| ITCZ | Intertropical Convergence Zone |
| ESSCO | Electronic Space Systems Corporation |
| AMSR | Advanced Microwave Sounding Radiometer |
| FX-ALPHA | FSL X-window AWIPS-Like Prototype For Hydrometeorological Applications |