| Acronym | Meaning |
 | RALPH | Reduction And Acquisition Of Lunar Pulse Heights |
| L | Low |
| SORTIE | Short Term Mission |
| GIRD | Ground Integration Requirements Document |
| DA | Distribution Assembly |
| GC | Gigacycles (1000 Megacycles) |
| DM | Data Manager |
| SRM | SPecification Requirements Manual |
| PTCS | Passive Thermal Control System |
| WWMS | Waste Water Management System |
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