Zhongmin Ma, 1. College of Geological Engineering and Geomatics, Chang’an University; 2. CommSensLab – UPC, Universitat Polit`ecnica de Catalunya – BarcelonaTech, China; Shuangcheng Zhang, College of Geological Engineering and Geomatics, Chang’an University, China; Hyuk Park, 1. CommSensLab – UPC, Universitat Polit`ecnica de Catalunya – BarcelonaTech; 2. Institute of Space Studies of Catalonia (IEEC) – CTE-UPC, Spain; Adriano Camps, 1. CommSensLab – UPC, Universitat Polit`ecnica de Catalunya – BarcelonaTech; 2. Institute of Space Studies of Catalonia (IEEC) – CTE-UPC; 3. ASPIRE Visiting International Professor, UAE University, Spain