1. National Key Laboratory of Science and Technology on Remote Sensing Information and Image Analysis, Beijing Research Institute of Uranium Geology, Beijing, People’s Republic of China
2. Key Laboratory of Airborne Geophysics and Remote Sensing Geology (Ministry of Nature Resources), China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing, People’s Republic of China
3. School of Economics, Sichuan University of Science and Engineering, Zigong, People’s Republic of China