Bistatic Synthetic Aperture Radar Imaging for Arbitrary Flight Trajectories and Non-flat Topography

This paper presents an approximate analytic inversion method for bistatic synthetic aperture radar. A scene of interest is illuminated by electromagnetic waves that are transmitted from positions along an arbitrary, but known, flight trajectory and the scattered waves are measured from positions along a different flight trajectory which is also arbitrary, but known. We assume a single-scattering model for the radar data, and we assume that the ground topography is known but not necessarily flat. We use microlocal analysis to develop a filtered-backprojection-type reconstruction method.