1. College of Oceanography and Space Informatics, China University of Petroleum (East China), Qingdao, China
2. Laboratory of Marine Physics and Remote Sensing, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
3. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
4. Key Laboratory of Technology in Geo-Spatial Information Processing and Application Systems, Aerospace Information Research Institute, Chinese Academy of Science, Beijing, China