1. School of Geography, South China Normal University, Guangzhou 510631, China
2. MOE Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
3. SCNU Qingyuan Institute of Science and Technology Innovation, Qingyuan 511500, China
4. Guangdong Shida Weizhi Information Technology Co., Ltd., Qingyuan 511500, China
5. Beidou Research Institute, South China Normal University, Guangzhou 510631, China
6. The State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan 430072, China