Second-Order Motion Compensation in Bistatic Airborne SAR based on the Windowed Fourier-Transformation

A crucial problem in most airborne Synthetic Aperture Radar (SAR) systems is the compensation of motion errors to prevent the image degradation. If these errors are not compensated, some undesired effects will appear, such as loss of geometric resolution and radiometric accuracy, reduction of image contrast, azimuth ambiguities and strong phase distortions. For the bistatic airborne SAR systems, the motion errors become more complex since two separate trajectory deviations contribute to these errors. This paper proposes an approach that will compensate the bistatic motion errors in the frequency domain.