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Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers (1994)
Pacific Grove, CA, USA
Oct. 31, 1994 to Nov. 2, 1994
ISSN: 1058-6393
ISBN: 0-8186-6405-3
pp: 1210-1215
A.W. Doerry , Sandia Nat. Labs., Albuquerque, NM, USA
ABSTRACT
Synthetic aperture radar (SAR) uses the motion of a small real antenna to synthesize a larger aperture, and thereby achieve very fine azimuth resolution. Efficient SAR image formation requires modelling the radar echo and compensating (focusing) the delay and phase for various positions in the target scene. Polar-format processing is one successful algorithm developed to process large scenes at fine resolutions, but is still limited, especially at resolutions near a wavelength. This paper shows how using tiers of subapertures can overcome the limitations of Polar-format processing and increase the focused scene size substantially while using only efficient vector multiplies and fast Fourier transforms.<>
INDEX TERMS
fast Fourier transforms, synthetic aperture radar, radar antennas, radar theory, radar imaging, aperture antennas
CITATION

A. Doerry, "Synthetic aperture radar processing with polar formatted subapertures," Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers(ACSSC), Pacific Grove, CA, USA, 1995, pp. 1210-1215.
doi:10.1109/ACSSC.1994.471651
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