as a result, the residual phase error caused by the src factor without range updating is reduced, so the focusing performance is dramatically improved and the effective swath width is enlarged.
in synthetic aperture sonar imaging, the residual phase error is mainly corrected via autofocus.
合成孔径声吶成像中,主要通过自聚焦校正剩余相位误差。
the phase balance of the central frequency can ensure the accuracy of the correlation phase, and the residual phase error will only reduce the coherency.