Long synthetic aperture time and large instantaneous beam can turn airborne synthetic
aperture radar (SAR) autofocus into a wide-beam autofocus problem; ie, the motion error is …

The improvement in azimuth resolution and/or the increase in the instantaneous beam width
can result in a wide-beam autofocus problem in airborne synthetic aperture radar (SAR) …

An autofocus operation is an indispensable procedure to obtain well-focused images for
synthetic-aperture radar (SAR) systems without precise navigation devices. Three …

With continuous improvement of the synthetic aperture radar (SAR) resolution, the 2-D
defocus effect in SAR image resulting from uncompensated motion error has made …

For ultrahigh resolution synthetic aperture radar (SAR), azimuth spectrum aliasing limits the
application of frequency-domain autofocus algorithms. Therefore, time-domain autofocus …

In the existing time-domain autofocus algorithms, the azimuth deramping operation will
change the azimuth-independent phase into the azimuth-dependent phase, which may …

Autofocus has attracted wide attention for unmanned aerial vehicle (UAV) synthetic aperture
radar (SAR) systems, because autofocus process is crucial and difficult when the phase …

Since the trajectory deviations of a radar platform cause serious phase errors that degrade
the focusing quality of synthetic aperture radar (SAR) imagery, an autofocus method is very …

For highly squinted synthetic aperture radar (SAR) imaging, the Omega-k algorithm is
generally accepted as an effective focusing processor. However, the performance of the …

The back projection (BP) algorithm is an accurate time-domain imaging method for synthetic
aperture radar. However, the influences of wind field and turbulence on the platform make …