JPSS ATMS On-Orbit SDR Data Product Status

The first of Joint Polar Satellite System satellites (JPSS-1) was successfully launched on November 18, 2017 and renamed to NOAA-20 after launch. After months of intensive post-launch calibration/validation assessment, both ATMS temperature data record (TDR, a.k.a. antenna brightness temperature) and sensor data record (SDR, a.k.a. sensor brightness temperature) data quality passed the validated maturity evaluation in June, 2018. Major on orbit instrument performance and data quality indices, such as channel sensitivity, channel correlation, striping noise, reflector emission, geolocation accuracy, and others, are calculated and monitored. Antenna pattern correction (APC) algorithm was revisited and coefficients were generated. The updated processing coefficients table (PCT) was transitioned to operations on June 14, 2018. SDR data quality is significantly improved in terms of angular dependent bias and cross scan asymmetry after applying the updated APC coefficients, which is better serve numerical weather prediction (NWP) applications. Additional improvements in ATMS data have been planned including antenna reflector emission correction in operational calibration algorithm so as to further improve both TDR and SDR data quality in the future. In this presentation, both NOAA-20 and S-NPP ATMS on orbit performance will be briefly illustrated based on the trending products from the near real time sensor performance and data quality monitoring system developed at NOAA/STAR. The preliminary reflector emissition correction results will be presented to demonstrate the improvement in ATMS data quality.