(The following is an excerpt from the introduction of the AN-ECMWF - Description and Interface Control Document. The complete document can be found at the CloudSat Standard Data Product Interface Control Document links page. )
AN-ECMWF data is produced by the European Center for Medium Range Weather Forecasting (ECMWF). It contains model output fields that are used in the development of CloudSat Standard Data Products. Data consists of global gridded data at 3-hr and 50-km resolution.