| Acronym | Meaning |
 | DRI | Data Rate Indicator |
| CCIR | International Radio Consultative Committee |
| FSI | Final Systems Installation |
| MRF | Maintenance Responsibility File |
| IPS | IRInclination Of The Ascending Return |
| IMU | Internal Measurement Unit |
| DDS | Data Display System |
| PFK | Payload Function Key |
| I | DAC Integrated Digital-Analog Converter |
| MVM | MarinerVenus/Mercury |
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