“十二五”国家科技支撑计划项目2015BAD07B04;国家自然科学基金重大国际合作基金项目41161140352;教育部人文社科青年基金项目10YJCZH122;高分辨率对地观测系统重大专项00-Y30B15-9001-14/16. [Key Projects in the National Science&Technology Pillar Program during the Twelfth Five-year Plan Period,No.2015BAD07B04;Major Program of National Natural Science Foundation of China,No.41161140352;Humanity and Social Science Youth foundation of Ministry of Education of China,No.10YJCZH122;Important National Project of High Resolution Earth Observation System,No.00-Y30B15-9001-14/16.]