Geometric calibration requires ground-based high-precision control data to calibrate the geometric parameters of the SAR system.
The angle reflector can form a strong brightness area on the SAR image, it is easy to accurately extract the center of the "bright spot", and it can provide high-precision control point information for the geometric calibration of the SAR system.
It has the advantages of large RCS, stable performance, not limited by band, simple processing, and low cost. It can be used for SAR geometric calibration/radiation calibration, quality evaluation, etc.