1. School of Resources and Environmental Engineering,
Hefei University of Technology, Hefei 230009, China.
2. State Key Laboratory of Remote Sensing Science,
Beijing Normal University, Beijing 100875, China.
3. Faculty of Geographical Science, Institute of Remote Sensing Science and Engineering,
Beijing Normal University, Beijing 100875, China.
4. School of Mechatronical Engineering,
Beijing Institute of Technology, Beijing 100081, China.
5. Aerospace Information Research Institute,
Chinese Academy of Sciences and University of Chinese Academy of Sciences, Beijing 100083, China.
6. German Research Center for Geosciences, Telegrafenberg, 14473 Potsdam, Germany.