TRMM Microwave Imager Emissive Reflector Correction for GPM V07 Reprocessing

This paper presents TRMM microwave imager (TMI) main reflector new physical temperatures (Tphy) look-up tables to produce next version of TMI brightness temperature products (GPM V07 Tbs). A modified and improved radiative transfer theory (RTM) based approach was used to determine the new physical temperatures (Tphy) for entire TRMM lifetime. New brightness temperatures (Tbs) were derived using new Tphy tables, and 13-month of reprocessed TMI Tbs were validated with GMI Tbs using XCAL Double Difference (DD) technique. Intercalibration results are presented, which show that new tables significantly reduce the emissive signal present in TMI V8 Tbs.