1. Faculty of Geomatics, Lanzhou Jiaotong University, National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, and Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou, China
2. 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