Radiometric intercalibration of the Microwave Humidity Sounder on NOAA-18, MetOp-A, and NOAA-19 using SAPHIR on Megha-Tropiques

The purpose of this paper is to ascertain the use of SAPHIR (in a low earth orbit) for radiometric brightness temperature, Tb, intercalibration of sounder channel sensors (in near polar orbits) within the context of the Global Precipitation Measurement (GPM) mission [1]. For this purpose, we present results of the radiometric intercalibration based on the double differences technique between SAPHIR and the Microwave Humidity Sounder (MHS) on the MetoOp-A, NOAA-18 and NOAA-19 polar orbiting satellites. The analysis presented was reported at the last intercalibration meeting at Toulouse, France, and were performed by Texas A&M University (TAMU), Science Systems and Applications (SSA) and, Central Florida Remote Sensing Lab (CFRSL) at University of Central Florida.