| Acronym | Meaning |
| FCS | Federal Communications System |
| T&O | Test And Operations |
| CIU | Communication Interface Unit |
| FRRID | Flight Readiness Review Item DescriPtion |
| MADC | Multiplexer Analog To Digital Converter |
| MDC | Mission Director Center |
| PDU | Pulse Detection Unit |
| FL | Feed Lines |
| DDC | Defense Documentation Center |
| TTCV | Tracking Telemetry |