S-NPP CrIS Full Spectral Resolution SDR Processing and Quality Assessment
Up to date, the S-NPP has been commanded three times in-orbit into FSR mode (02/23/2012, 03/12/2013, and 08/27/2013) for testing. The CrIS full resolution Processing System (CRPS) has been developed to generate the FSR SDR, which includes the operational CrIS SDR software in the form of Algorithm Development Library (ADL), modified in both algorithm and code to process the FSR data. The FSR SDR software/algorithm was validated based on the Calibration and Validation (Cal/Val) work performed by the CrIS SDR science team on the normal mode data and the assessment of the FSR SDRs generated from the three in-orbit FSR tests. In the assessment work, the radiometric and spectral accuracies were assessed by analyzing the difference between observations and simulations using the Community Radiative Transfer Model (CRTM) and by comparing CrIS with IASI using the Simultaneous Nadir Overpass (SNO) and Double Difference methods. In addition, the consistency in radiometric and spectral accuracy among the 9 Field-of-Views (FOVs) is also evaluated through FOV-to-FOV comparisons. Results showed that CrIS FSR SDRs generated with CRPS have similar radiometric and spectral accuracy as those from normal mode. In this presentation, we will overview the FSR SDR processing algorithms and show the results of the SDR quality assessments from the data collected during the in-orbit FSR tests and the new data that will be received after the S-NPP CrIS is commanded into FSR mode in December 2014.