Motion error parameter estimation based on vortex echo data

The carrier platform in synthetic aperture radar (SAR) imaging may deviate from the correct trajectory due to end currents in the atmosphere, causing motion errors and ultimately degrading the quality of the radar image. Techniques for motion compensation can reduce the impact of motion errors on the results of the imaging process. Motion error parameters are necessary for motion compensation algorithms. In this paper, the line of sight (LOS) error of the carrier platform is estimated based on the vortex-selected SAR imaging system by analysing the vortex SAR echo data using the relationship between the Bessel magnitude term, the phase term, and the motion error. The validity of the method is verified through numerical simulations.