1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan, China
2. Earth Observation Group, National Centers for Environmental Information, National Oceanic and Atmospheric Administration, Boulder, CO, USA
3. Department of Geological & Atmospheric Sciences, Iowa State University, Ames, IA, USA
4. Center for Satellite Applications and Research, National Centers for Environmental Information, College Park, MD, USA
5. Department of Geology and Geography, West Virginia University, Morgantown, WV, USA