NPP/JPSS CrIMSS EDR Alogirthm Validation and Tuning

The Cross-track Infrared and Microwave Sounder Suite (CrIMSS) was successfully launched onboard of Suomi National Polar-orbiting Partnership (NPP) in October 2011. The CrIMSS consists of the Advanced Technology Microwave Sounder (ATMS) and Cross-track Infrared Sounder (CrIS) instruments. The primary products of the CrIMSS Environmental Data Record EDR) include global temperature, moisture and pressure vertical profiles. The CrIMSS EDR operational code is designed to run on a dedicated large computer system, which can process sensor data records (SDRs) and EDRs for several NPP sensors (eg. VIIRS, OMPS, CrIS, ATMS etc). In order to efficiently validate the CrIMSS EDR algorithm, we have ported the CrIMSS operational code to run on small LINUX system by removing non-CrIMSS related portion of the codes. An overview of the CrIMSS EDR algorithm will be given. We will show procedures for performing algorithm tuning and modifications to improve the CrIMSS EDR performance and output yields. The tuned algorithm has been successfully applied to the NPP CrIMSS data and the results show improved EDR performance when compared with ECMWF profiles and with radiosondes. Example of atmospheric temperature and moisture retrievals over different parts of the earth will be given. RMS and bias errors of the CrIMSS EDR product as a function of atmospheric pressure will be given.