1. Renmin University of China, School of Environment and Natural Resources, Center for Spatial Information, 59 Zhongguancun Street, Beijing 100872, China
2. Renmin University of China, School of Environment and Natural Resources, Center for Spatial Information, 59 Zhongguancun Street, Beijing 100872, ChinabIMSG at NOAA/NESDIS/STAR, 5825 University Research Center, Suite 3250, M Square, College Park, Maryland