2025 Volume 81 Issue 3 Article ID: 24-00183
On slopes with few man-made structures in mountainous areas, permanent scattering points that can accurately measure displacement cannot be obtained from PSInSAR analysis using satellite SAR data. The corner reflector is installed at the desired measurement point, which becomes a permanent scattering point and enables highly accurate measurements. In this paper, the accuracy of displacement measurement at corner reflector was verified by comparing the forced displacement of corner reflector with the displacement measurement results from PSInSAR analysis using Sentinel-1 SAR data. Slope displacement monitoring of with displacements as small as about 1 mm to 2 mm per month was carried out by PSInSAR analysis using Sentinel-1 SAR data. Small, inexpensive corner reflectors were installed to verify that displacement measurement is possible at the corner reflectors as well as at the artificial structure locations.
