1. School of Precision Instrument and Opto-Electronic Engineering, Tianjin University, Tianjin, China
2. Guangxi Key Laboratory for Spatial Information and Geomatics, Guilin University of Technology, Guilin, Guangxi, China
3. The Center for Remote Sensing, Tianjin University, Tianjin, China
4. School of Marine Science and Technology, Tianjin University, Tianjin, China
5. College of Earth Sciences, Guilin University of Technology, Guilin, P. R. China
6. Mechanical and Aerospace Engineering, Old Dominion University, Norfolk, VA, USA