| Acronym | Meaning |
| PCDS | Pilot Climate Data System |
| ACSH | American Council On Science & Health |
| LDR | Linear Depolarization Ratio |
| NSO | National Solar Observatory |
| CDR | Critical Design Review |
| EOC | EOS Operations Center |
| ADAAC | EOS Program |
| IFC | InFlight Black Body Calibrator |
| FDMA | Frequency Division Multiple Access |
| MM | Milli Mole |