1. First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
2. Key Laboratory of Technology in Geo-Spatial Information Processing and Application Systems, Aerospace Information Research Institute, Chinese Academy of Science, Beijing, China
3. National Satellite Ocean Application Service, Ministry of Natural Resources, Beijing, China
4. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China