1. Department of Photogrammetry and Remote Sensing, Finnish Geospatial Research Institute, Masala, Finland
2. Key Laboratory of Quantitative Remote Sensing Information Technology, Chinese Academy of Sciences, Beijing, China
3. Electronic Inforamtion School, Wuhan University, Wuhan, China
4. Department of Electronics Engineering, Anhui Jianzhu University, Hefei, China
5. Department of Communication and Information Engineering, Shanghai Polytechnic University, Shanghai, China