SAR is capable of extracting micro deformation and displacement information in large-scale observations. It is mainly applied in the real-time monitoring of surface displacement. Due to its all-day, all-weather and large-scale applications, and high precision, real-time automatic monitoring, it is extensively used for deformation monitoring in geological disasters, open-pit mines, water conservancy dams and road slopes.
The main monitoring indicators are surface coordinates and the corresponding deformation value. The deformation value here refers to deformation (unit: mm) in the direction of the radar line of sight. Indicators involved in monitoring applications such as deformation rate, deformation acceleration and tangent angle can be calculated with the deformation value.