CIMSS-NOAA Weekly Report
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Intercalibration of Fengyun-2B Infrared Data with the Atmospheric Infrared Sounder: In close collaboration with scientists at the China Meteorological Administration (CMA) a sample of Fengyun-2B (FY-2B) geostationary data was obtained at the Cooperative Institute of Meteorological Satellite Studies (CIMSS) along with the spectral response function and a 0-255 count lookup table for the infrared window (IRW) channel. The spectral response functions (SRFs) were used to calculate coefficients for converting radiance to brightness temperature and high spectral-resolution Atmospheric Infrared Sounder (AIRS) polar-orbiting data were convolved with the SRF so that AIRS and FY-2B could be effectively compared. A brightness temperature difference of 2.3 K was found for this one case, a relatively good result given the inherent lack of calibration accuracy on FY-2B. CIMSS plans to obtain and intercalibrate FY-2C, the recently launched follow-up to FY-2B, when data becomes available through the Space Science and Engineering Center (SSEC) Data Center. (M. Gunshor, CIMSS, 608-263-1146, W. P. Menzel, E/RA2, 608-263-4930, T. Schmit, E/RA2, 608-263-0291)
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