Extracting radar shadow from SAR images

In This paper, a more simple approach for radar shadow extracting from SAR images is proposed. It´s based on 1D geometry projection using a digital elevation model (DEM) and considering the corresponding georeferenced SAR image. The DEM to be processed is firstly rotated into the radar geometry so that each row would be suitable for a radar line of sight. Then, the extraction of shadow would be done per row. The proposed method is tested on DEMs as well as on a simulated hilly modeled by Gaussian functions. The obtained results are very interesting, especially for simulated data with high resolution.