of;
Information;
Science;
and;
Technology,;
Ocean;
University;
of;
China,;
Qingdao;
266100,;
China;
Key;
Laboratory;
of;
Satellite;
Ocean;
Environment;
Dynamics,;
Second;
Institute;
of;
Oceanography,;
State;
Oceanic;
Administration,;
Hangzhou;
310012,;
China;
School;
of;
Engineering,;
Hiroshima;
University,;
Higashi-Hiroshima;
739-8527,;
Japan;