1. First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China,
2. National Satellite Ocean Application Service (NSOAS), Beijing, China
3. Geodesy and Geomatics Engineering Laboratory, Technical University of Crete, Chania, Greece
4. North China Sea Bureau of Ministry of Natural Resources, Qingdao, China
5. Shandong University of Science and Technology, Qingdao, China