Resolution analysis of sector scan GB-SAR for wide landslides monitoring

In this paper, the authors propose sector scan ground-based synthetic aperture radar (GB-SAR) technique for real-time monitoring of wide-ranging landslides. The non-linear movement of the antenna which moves along a sector to form a wide scanning area makes the azimuth properties complicated. Geometric model of the antenna movement is established to derive the slant range expression. Further, the azimuth properties of the new mode are especially investigated, containing calculation and discussion of azimuth bandwidth and resolution. Imaging simulation of point target and point array target are carried out, whose result can agree with the analysis above well showing the feasibility of the model and the correctness of the analysis.