1. School of Resource and Environmental Sciences, Wuhan University, Wuhan, P.R. China
2. State Key Laboratory of Information Engineering in Surveying institution, Mapping, and Remote Sensing, Wuhan University, Wuhan, P.R. China
3. Department of Energy and Technology, Norwegian Research Centre AS, Grimstad, Norway
4. National Institute of Natural Hazards, Ministry of Emergency Management of the People’s Republic of China, Beijing, P.R. China