FY-4B与FY-4A云顶性质产品精度的一致性评估OA北大核心CSTPCD

The FengYun-4(FY-4)meteorological satellite is the second generation of China's geostationary meteorological satellite.FY-4B satellite utilizes identical algorithms as its predecessor,FY-4A,for retrieving cloud top temperature,height,and pressure.To facilitate the application of FY-4B cloud top products,this paper evaluated the consistency of the accuracy of the cloud top retrievals from FY-4A and FY-4B,and compared them with those from the EOS/MODIS polar-orbiting meteorological satellite of the United States and Himawari-8,Japan's second-generation geostationary meteorological satellite.The results show that the cloud top retrievals from FY-4B exhibited good consistency with those from FY-4A.The larger error in FY-4B's classification of multi-layer clouds mainly arose from the misclassification of cirrus clouds into multi-layer clouds.The validation results of the whole sample show that the accuracy of FY-4B cloud top retrievals is consistent with that of FY-4A.The discrepancies between them are primarily attributed to the variations in channel spectral characteristics,calibration accuracy,and the difference in the radiative transfer model used.