FY-4B与FY-4A云顶性质产品精度的一致性评估  

Consistency of the Accuracy of FY-4B and FY-4A Cloud Top Products

作　　者：张淼 徐娜[1] 陈林[1] 刘健 杨昌军[1] ZHANG Miao;XU Na;CHEN Lin;LIU Jian;YANG Changjun(Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites/FengYun Meteorological Satellite Innovation Center(FY-MSIC)/National Satellite Meteorological Center,China Meteorological Administration,Beijing 100081,China)

机构地区：[1]中国气象局中国遥感卫星辐射测量和定标重点开放实验室/许健民气象卫星创新中心/国家卫星气象中心,北京100081

出　　处：《热带气象学报》2024年第3期389-396,共8页Journal of Tropical Meteorology

基　　金：国家重点研发计划项目(2023YFB3905305);第二次青藏高原科学考察研究项目(2019QZFKO105)共同资助。

摘　　要：风云四号(FY4)气象卫星是我国第二代静止气象卫星,FY4B云顶温度、云顶高度和云顶压强的反演算法与FY4A相同,为了方便用户更好地应用FY4B云顶产品,本文利用美国EOS/MODIS极轨气象卫星和日本第二代静止气象卫星Himawari-8云产品检验FY4A和FY4B反演的云顶产品精度的一致性,结果表明,FY4B云顶产品与FY4A具有很好的一致性,其中B星多层云的较大误差主要是由于云分类将卷云错判成了多层云所致。从全样本的检验结果可以看出FY4B云顶参数产品的精度与FY4A精度大体相当,两者的差异主要来自于通道光谱特征的改变、定标精度及所用的辐射传输模式的不同。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.

关 键 词：FY4 云顶温度 云顶高度 云顶压强 精度检验 

分 类 号：P426.6[天文地球—大气科学及气象学]