Microdeformation monitoring by permanent scatterer GB-SAR interferometry based on image subset series with short temporal baselines: The Geheyan Dam case study

Deformation extraction of building facade using ground-based interferometric synthetic aperture radar assisted by 3D laser scanning technology

“…The GB-SAR operates at a closer distance than the satellite-borne SAR sensor, and the imaging target is generally in the vicinity of the radar antenna radiation near-field area, which does not satisfy the far-field approximation condition and forms a special sector grid coordinate system [13]. Each pixel is uniquely determined by its distance from the radar center and the angle of deviation from the radar centerline, allowing for the calculation of pixel Cartesian coordinates on the radar imaging plane according to (1). Assuming that (x, y, z) represents the 3D coordinates under the radar coordinate system created after translating the point cloud (or other 3D data) by the center of the circle and rotating it by the y-axis.…”

“…It is challenging to fully exploit the performance of satellite-borne InSAR technology in localized small-area scenes on the ground surface as well as in monitoring applications of special deformation directions due to the limitations of side-view angle, spatial resolution, and revisit period of satellite-borne SAR sensors. The advent of Ground-based Synthetic Aperture Radar Interferometry (GB-InSAR) technology has introduced a novel approach for high-precision surface deformation monitoring and analysis in these specialized scenarios [1][2][3][4]. After more than two decades of development, GB-InSAR technology is now progressively moving from the experimental validation stage to the stage of core technological improvement, engineering structure, and geohazard monitoring application promotion.…”

Study on a combined threshold selection method of persistent scatterers for ground-based synthetic aperture radar

“…Among the three water conservancy stages on the Qing River, the Geheyan Water Conservancy Hub is the first developed large-scale hydropower project, supporting functions such as power generation, flood control, and navigation [7]. In this experiment, the GB-SAR system IBIS-L was employed to conduct deformation monitoring of the Geheyan dam body and the near-dam area, acquiring continuous GB-SAR image data.…”

“…The Ground-based Synthetic Aperture Radar (GB-SAR) interferometry technology has been widely used in numerous fields, including engineering structure analysis and geologic disaster monitoring, in recent years, due to its advantages in spatial and temporal resolution, accuracy, and station flexibility [1][2][3][4][5][6][7]. It provides an effective means for safety assessment and scientific research in these domains.…”

A Three-Dimensional Deformation Monitoring Method: Combining Optical Deformation Monitoring Based on Regression Models and GB-SAR Interferometry

“…Ground-based synthetic aperture radar (GB-SAR), following in the footsteps of space-based and airborne SAR, has gained widespread adoption for high-precision deformation monitoring in areas affected by natural disasters, dams, alpine glaciers, and pier structures. This popularity is attributed to its advantages, including a short space-time baseline, high resolution, a brief measurement period, and ease of operation [ 11 , 12 , 13 ].…”