FIDUCEO project: Product user guide – Upper Tropsheric CDRs from microwave sounders

This document describes the Upper Tropospheric Humidity (UTH) CDR(version 1.2) data files uploaded to CEMS in February 2019. The released data record is based on the Microwave "easy" FCDR version 4.1 (see Microwave FCDR PUG). The instantaneous observations from the FCDR are used to derive a spatio-temporal averaged data record, which contains monthly mean UTH and brightness temperature mapped to a regular latitude/longitude grid covering the tropical region with a spatial resolution of 1° x1°. It covers all mission years of SSMT2 on F11, F12, F14, F15, AMSU-B on NOAA15-17 and MHS missions (NOAA18, NOAA19, MetopA, Metop-B). This product user guide gives: 1. An overview of the specifications of the data record; 2. A description of the implementation of the retrieval processing chain; 3. Information on limitations of this current version of the data record; 4. Technical details on the format and on how to access the data