High-resolution airborne synthetic aperture radar

(SAR) systems are very sensible to deviations of the aircraft from

the reference track. In high-resolution imagery, the improvement

of range resolution increases the difficulty of implementing range

cell migration correction (RCMC), while a wider synthetic aperture

increases the cumulative time of motion errors which will

affect the image quality. To enable accurate motion compensation

in image processing, a high-precision navigation system is needed.

However, in many cases, due to the limit of accuracy of such systems,

motion errors are hard to be compensated correctly, causing

mainly the resolution decrease in final image