High-resolution dynamic surface water mapping in the Hindu Kush Himalaya region by integrating SDGSAT-1 and Sentinel-2 observations - Xidong Chen; Shanlong Lu; Bin Chen; Xinya Kuang; Junguo Liu; Liangyun Liu; Congcong Wen; Harrison Odion Ikhumhen; Cong Du; Changyong Dou; Xiao Zhang; Huadong Guo (Remote Sensing of Environment, 2026)