风云四号红外高光谱GIIRS中波通道亮温偏差订正
Infrared（2021）
Abstract
变分同化风云四号干涉式大气垂直探测仪(Geostationary Interferometric Infrared Sounder,GIIRS)中波通道亮温偏差要求满足高斯分布,因此需进行GIIRS资料偏差订正.在Harris B A等人提出的“离线”法的基础上,发展了基于随机森林(Random Forest,RF)的GIIRS偏差订正方法.在具体执行过程中,基于风云四号多通道扫描成像辐射计(Advanced Geosynchronous Radiation Imager,AGRI)云产品对GIIRS资料进行了云检测.试验结果表明,经过偏差订正的GIIRS亮温偏差满足高斯分布的假定.与“离线”法相比,RF法的订正效果更好.
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