**Author details**

Weiping Kong1 \*, Yinli Bi2 , Wenjiang Huang3 , Lingli Tang1 , Chuanrong Li1 and Lingling Ma<sup>1</sup>

\*Address all correspondence to: kongwp@radi.ac.cn

1 Key Laboratory of Quantitative Remote Sensing Information Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China

2 State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing, China

3 Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China
