1. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, China
2. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China
3. Zhejiang University/University of Illinois at Urbana-Champaign (ZJU-UIUC) Institute, Zhejiang University, Haining, China
4. Centre d'Etudes Spatiales de la Biosphère (CESBIO), Université de Toulouse (CNES/CNRS/INRAE/IRD/UPS), Toulouse, France
5. National Space Science Center, Chinese Academy of Sciences, Beijing, China