1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China
2. Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy
3. Laboratory of Geo-Information Science and Remote Sensing, Wageningen University & Research, Wageningen, PB, The Netherlands
4. National Space Science Center, Chinese Academy of Sciences, Beijing, China