Title :
Extending the phase gradient autofocus algorithm for low-altitude stripmap mode SAR
Author :
THOMPSON, Douglas G. ; Bates, James S. ; Arnold, David V. ; Long, David G.
Author_Institution :
Brigham Young Univ., Provo, UT, USA
Abstract :
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 been proven to be a superior autofocus method. This algorithm is extended for application to low-altitude stripmap mode SAR. Standard PGA algorithms are formulated only for spotlight-mode SAR. We describe a new algorithm which allows PGA to be applied to stripmap-mode SAR. Three SAR images with different characteristics are used in demonstrating this algorithm
Keywords :
focusing; image enhancement; interference suppression; radar imaging; synthetic aperture radar; PGA algorithm; low-altitude stripmap mode SAR; motion-induced blurs; phase gradient autofocus algorithm; spotlight synthetic aperture radar; Azimuth; Bandwidth; Chirp; Electronics packaging; Focusing; Fourier transforms; History; Image segmentation; Phase estimation; Synthetic aperture radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.773566
