“风云二号”(FY-2C)的主要载荷是自旋稳定平台上的多通道扫描辐射计。卫星进入午夜工作时,太阳光线将会入射到辐射计的R-C光学系统中,并且经过各种器件及框架结构反射或者漫反射,从而产生影响成像的杂散光。针对气象部门提供的FY-2C卫星云图中午夜杂散光较严重的情况,分析了特定噪声区域的产生原因,并为同型号卫星星载扫描辐射计的改进提供参考性建议。 The main load of “FY-2C” (FY-2C) is a multi-channel scanning radiometer on a spin-stable platform. When the satellite enters midnight, the sun’s rays will be incident on the radiometer’s R-C optics and be reflected or diffusely reflected by various devices and frame structures, creating stray light that affects imaging. Aiming at the serious midnight stray light of FY-2C satellite cloud image provided by the meteorological department, the causes of the specific noise region are analyzed, and the suggestions for the improvement of the same satellite satellite-borne scanning radiometer are provided.