1. College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China
2. Key Laboratory of VGE of Ministry of Education, Nanjing Normal University, Nanjing, China
3. Land Satellite Remote Sensing Application Center, Beijing, China
4. Academy of Ecological Civilization Development for JING-JIN-JI, Tianjin Normal University, Tianjin, China