Single-channel SAR moving ship two-dimensional speed estimation and repositioning method and device

The invention provides a single-channel SAR moving ship two-dimensional speed estimation and repositioning method and device, and relates to the technical field of synthetic aperture SAR load platform imaging. The method comprises the steps that a single-channel SAR ship image is acquired and corrected, and the azimuth velocity of a ship in the single-channel SAR ship image and a focused image of the single-channel SAR ship image are obtained; detecting the course of the ship based on the scattering energy distribution of the ship in the focused image to obtain the actual motion vector direction of the ship; based on the actual motion vector direction and the azimuth direction speed of the ship, calculating the distance direction speed of the ship; calculating the offset of the ship in the azimuth direction based on the distance direction speed so as to reposition the ship; and synthesizing the range velocity and the azimuth velocity to obtain an actual velocity vector of the ship. The method has the advantag