Trimble.ccf–dataloggerconfigurationfile(settings)..CS–CoordinateSystemfileforusewithanimageinTerraSync..csd–aCoordinateSystemDatabasefile(forsavingcustomizedcoordinatesystems)..cse--GPSfiletypicallyreferredtoasaRoverfile(StandardStorageFormat)..cor–Differentiallycorrectedfile..ddf–