Airborne Spotlight SAR Imaging with Super High Resolution based on Back-Projection and Autofocus Algorithm

In this paper, we consider the super resolution millimeter wave spotlight SAR imaging problem through the simulation under the given Strap-down Inertial Navigation System/Global Positioning System (SINS/GPS) and introduce the Phase Gradient Algorithm (PGA) into the Back-Projection (BP) for SAR focusing. The imaging results indicate that it is feasible to obtain super high resolution imagery at the millimeter wave using the SINS/GPS.

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