A GB-SAR operating in monostatic and bistatic modalities for retrieving the displacement vector

GBSAR (Ground-Based Synthetic Aperture Radar) systems are popular remote sensing instruments for detecting ground changes of slopes, and small displacements of large structures as bridges, dams, construction works. These radars are able to provide maps of displacement along range direction only. In this letter the authors propose to use a transponder for operating a conventional linear GBSAR as a bistatic radar with the aim to acquire two different components of the displacement of the targets in the field of view.