Video SAR Registration Based on Phase Equalization of Common Pulses in Overlapped Aperture Mode

Using a synthetic aperture radar (SAR) mounted on a moving platform enables generation of a video SAR sequence composed of continuous SAR frames of the area of interest. When drones or aircraft are employed, even following motion compensation through the navigation system and quality improvement through autofocus techniques, misalignment between adjacent video SAR frames can cause jitter in the viewport. This study analyzes the registration characteristics between adjacent video SAR frames and proposes a registration technique based on common pulse phase equalization in the overlapped aperture mode. The registration performance of the proposed method is verified using the Gotcha dataset with added random motion and a drone SAR dataset.