基金supported by the National Key Basic Research Program of China[grant number 2014CB447900]the National Natural Science Foundation of China[grant number 41305115]+2 种基金the Strategic Priority Research Program(B)of the Chinese Academy of Sciences[grant number XDB05020501]the Project of High-resolution Earth Observation System[grant number 05-Y30B02-9001-13/15-7-WX02]Commonwealth Project in Ministry of Environmental Protection[grant number 201309011]