| Acronym | Meaning |
| HSP | Health Stabilization Program |
| RTG | Range (Slant) To Ground |
| FRZR | Freezer |
| TIS | Test Interface Subsystem |
| PDM | Pulse Duration Modulation |
| WTT | Wind Tunnel Test |
| DA&D | Data Acquisition And Distribution |
| SEM | Space Environment Monitoring |
| SCIU | Selector Control Interface Unit |
| PFCF | Payload Flight Control Facility |