Hydrometeorological;
Research;
Institute,;
Nanjing;
University;
of;
Information;
Science;
＆;
Technology,;
Nanjing;
210044,;
China;
of;
Electronic;
Information,;
Wuhan;
University,;
Wuhan;
430079,;
China;
Key;
Laboratory;
of;
Information;
Engineering;
in;
Surveying,;
Mapping;
and;
Remote;
Sensing,;
Wuhan;
University,;
Wuhan;
430079,;
China;
