Self-focusing method and device for high-resolution scanning synthetic aperture radar

The invention discloses a self-focusing method for a high-resolution scanning synthetic aperture radar. The self-focusing method comprises the steps that sub-aperture division is conducted on ScanSAR data of each sub surveying and mapping band of the scanning synthetic aperture radar; phase error estimation is conducted on each sub-aperture; phase error stitching is conducted on the obtained phase error of each sub-aperture, and the full-aperture phase error of each sub surveying and mapping band is obtained; full-aperture phase error correction and azimuth compression are conducted on the ScanSAR data of each sub surveying and mapping band. The invention further discloses a self-focusing device for the high-resolution scanning synthetic aperture radar.