Fangfang Yu1 and Xiangqian Wu2

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Presentation transcript:

Fangfang Yu1 and Xiangqian Wu2 Detections of Radiometric Calibration Update/Anomaly with ABI vs. CrIS/IASI IR Inter-Calibration Fangfang Yu1 and Xiangqian Wu2 1: ERT, Inc@NOAA/NESDIS/STAR 2: NOAA/NESDIS/Center for Satellite Application and Research (STAR) 2/23/2019

10/19/2017: updates of ABI Scan mirror Emissivity LUTs

08/02/2017: Metop-B IASI non-linearity correction update for its long-wavelength band 10/19/2017: updates of ABI Scan mirror Emissivity LUTs

Summary Double difference method is very valuable to detect and validate possible change in instrument calibration The update of Metop-B IASI and ABI ground processing can be detected with the daily mean Tb bias Both ABI and IASI are very stable Double difference results can be affected with uncertainty in the transfer instrument measurement The residual of ABI scan mirror spatial uniformity corrections amplify the impact Observed from August 1 – Oct. 19, 2017 Update of the ABI scan mirror emissivity LUTs reduced the ABI Tb bias to CrIS and IASI, as expected 2/23/2019