| Abbreviation | Definition |
|---|---|
| CEDAR | Coupling Energetics and Dynamics of Atmospheric Regions |
| CEEF | Cumulus Expansion Enabling Factor |
| CEMSCS | Central Environmental Satellite Computer System |
| CENR | Committee on Environment and Natural Resources |
| CEOI | Centre for Earth Observation Instrumentation |
| CEOS | Centre for Earth Observation Science |
| CERES | Clouds and Earth's Radiant Energy System |
| CET | Certified Electronics Technician |
| CF | Canopy Formation |
| CFEP | Communications Front-End Processor |
| CFF | Cartographic Feature File |
| CFIJ | Charlie, Francis, Ivan, and Jeanne hurricanes |
| CFLOS | Cloud Free Line Of Sight |
| CGCP | Climate and Global Change Program |
| CGMS | Coordination Group for Meteorological Satellites |
| CGSP | Cologne Global Study Program |
| CHAMMP | Computer Hardware Advanced Mathematics and Model Physics |
| CHANCES | Climatological and Historical Analysis of Clouds for Environmental Simulations |
| CICS | Cooperative Institute for Climate Science |
| CID | Compact Intracloud Discharge |