| Acronym | Meaning |
| DFI | Development Flight Instrumentation |
| ACRIM | Active Cavity Radiometer Irradiance Monitor |
| ORD | Orbital Requirements Document |
| LL | Low Level |
| GSFC | Goddard Space Flight Center (Greenbelt |
| FHO | Failed Handover |
| F/A | Fuel-Air |
| SS | Shuttle System |
| CATEG | Category |
| STADAC | Station Data Acquisition And Control |