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Radio Physics and Radio Astronomy

ISSN Druckformat: 2152-274X
ISSN Online: 2152-2758

Archives: Volume 1, 2010 to Volume 3, 2012

Radio Physics and Radio Astronomy

DOI: 10.1615/RadioPhysicsRadioAstronomy.v2.i3.100
pages 277-286

SAR PROCESSING ALGORITHM WITH BUILT-IN GEOMETRIC CORRECTION

O. O. Bezvesilniy
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
I. M. Gorovyi
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
S. V. Sosnytskiy
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
V. V. Vinogradov
Institute of Radio Astronomy, National Academy of Sciences of Ukraine
Dmitry M. Vavriv
Institute of Radio Astronomy, National Academy of Sciences of Ukraine 4, Krasnoznamennaya St., Kharkiv 61002, Ukraine

ABSTRAKT

Synthetic aperture radar (SAR) systems onboard small aircrafts suffer from trajectory deviations and instabilities of antenna orientation. These kinds of motion errors lead to significant geometric distortions in SAR images. In order to correct the distortions, we propose a time-domain multi-look stripmap SAR processing algorithm with built-in geometric correction. In the algorithm, the azimuth reference functions and range migration curves are designed to produce SAR images directly on a correct rectangular grid on the ground plane. The proposed technique has been successfully tested by using a Ku-band airborne SAR system installed onboard light-weight aircraft.


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