Retrieving and Verifying Three-Dimensional Surface Motion Displacement of Mountain Glacier from Sentinel-1 Imagery Using Optimized Method

The time series study of glacier movement is special importance for rational management freshwater resources, studying evolution, understanding mechanism movement, and assessing disasters caused by movement. In this paper, we put forward an optimization scheme the shortcomings in calculation method using remote sensing to invert three-dimensional (3D) surface motion displacement glacier. optimized consists Offset Tracking method, Optimizing offset tracking results means iterative filtering, OT-SBAS technology Conversion 3D Urumqi Glacier No. 1 was selected test method. retrieved based on ascending descending Sentinel-1 datasets from 19 April 29 August 2018. distribution velocity obtained series, accuracy inversion evaluated field measurement data. show that accuracies inverted displacements east branch (UG1E) were about 0.062, 0.063, 0.152 m east, north vertical directions, these values west (UG1W) 0.015, 0.020 0.026 m, respectively. It indicated data retrieve should satisfy requirements inversing high-latitude mountain glaciers China.