1. Chinese Academy of Meteorological Sciences, Beijing 100081, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center (National Center for Space Weather), China Meteorological Administration, Beijing 100081, China
4. Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081, China
5. Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China