Funding for this research was provided by:
National Natural Science Foundation of China (41771365)
National Key Research and Development Program of China (2016YFA0600101)
Special Fund for Young Talents of the State Key Laboratory of Remote Sensing Sciences (17ZY-02)
Article History
Received: 5 February 2017
Accepted: 12 February 2018
First Online: 26 February 2018