Zhizhou Guo, Baojian Liu, Wei Wan, Peking University, China; Feng Lu, Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, China; Xinliang Niu, Jing Cheng, China Academy of Space Technology Xi'an Branch, China; Weiqiang Li, Earth Observation Research Group, Institute of Space Sciences, China; Xi Chen, Peking University, China; Jun Yang, Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, China; Zhaoguang Bai, DFH Satellite Co. Ltd., China