Spatial Variability of Active Layer Thickness along the Qinghai-Tibet Engineering Corridor Resolved Using Ground-Penetrating Radar. - Shichao Jia; Tingjun Zhang; Jiansheng Hao; Chaoyue Li; Roger J. Michaelides; Wanwan Shao; Sihao Wei; Kun Wang; Chengyan Fan (Remote. Sens., 2022)