High resolution radar and sonar images can be constructed using either spotlight or
stripmap synthetic aperture systems. In the presence of residual phase errors, the respective …

A subaperture autofocus algorithm for synthetic aperture radar (SAR) partitions range-
compressed phase-history data collected over a full aperture into equal-width subapertures …

The phase gradient autofocus (PGA) algorithm has been widely used in spotlight synthetic
aperture radar (SAR) to remove motion-induced blurs in the images. The PGA algorithm has …

Current sonar autofocus techniques for blur removal originate in the radar community but
have not provided a complete solution for Synthetic Aperture Sonar (SAS) imagery. The …

The phase gradient autofocus (PGA) technique is used for automatic estimation and
correction of phase errors in spotlight mode synthetic aperture radar (SAR) imagery. This …

The phase-gradient autofocusing algorithm (PGA) has been widely used in spotlight
Synthetic Aperture Radar (SAR) tocompensate motion-induced blurs in the images. The …

To focus a synthetic-aperture radar image that is suffering from phase errors, a phase-error
estimate is found that, when it is applied, maximizes the sharpness of the image. Closed …

Synthetic Aperture Radar (SAR) imaging is a class of coherent range and Doppler signal
processing techniques applied to remote sensing. The aperture is synthesized by recording …

In recent papers the authors discussed the advantages of forming spotlight-mode SAR
imagery from phase history data via a technique that is rooted in the principles of phased …

The phase gradient autofocus (PGA) algorithm is extended to work for synthetic aperture
radar (SAR) spotlight images processed with range migration (wk) algorithms. Several pre …