Siyuan Wan, Mugen Peng, Hongyu Wang, Beijing University of Posts and Telecommunications, China; Yuanben Zhang, Chinese Academy of Sciences, China; Conghao Li, Wenjia Xu, Beijing University of Posts and Telecommunications, China

Michael Dellaiera, Koen Mouthaan, National University of Singapore, Singapore

Yangyang Cao, Francesco Nex, Michael Marshall, The Faculty of Geo-Information Science and Earth Observation, Netherlands; Gabriele Candiani, Monica Pepe, Mirco Boschetti, Francesco Nutini, Institute for Electromagnetic Sensing of the Environment, Italy; Mariana Belgiu, The Faculty of Geo-Information Science and Earth Observation, Netherlands