1. Key Laboratory of Remote Sensing of Gansu Province, Heihe Remote Sensing Experimental Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
2. University of Chinese Academy of Sciences, Beijing, China
3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China
4. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
5. School of Geodesy and Geomatics, Gansu Forestry Polytechnic, Tianshui, China