Abstract
In circular synthetic aperture radar (CSAR), targets are usually scanned over the complete azimuthal aperture of 360°. Thus CSAR can provide a higher image resolution, increased object information and 3-D imaging in comparison to the linear SAR system. This paper presents a low frequency ultra-wideband CSAR experiment and results. The CSAR system, operating in the P band, is based on a P band UWB SAR system integrated onboard a vehicle (IVECO). For the measurement campaign is a near field imaging, the transmitter and the receiver is bistatic, which are set on the top of the IVECO separately. A measurement campaign was conducted to investigate the performance of the low frequency UWB CSAR imaging and scattering characteristics of complex vehicle target. A CSAR imaging method, which is based on fast factorized back projection (FFBP), is proposed to focusing near field data, and the reconstructed images are cleaned out from clutter to more easily visualize the layover artifacts.
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