1. The College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China
2. The State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan, China
3. School of Electrical and Information Engineering, Wuhan Institute of Technology, Wuhan, China
4. Value-added Service Department, China Center for Resources Satellite Data and Application, Beijing, China