Imaging processor for different spaceborne SAR imaging modes


Up to now, multiple innovative spaceborne synthetic aperture radar (SAR) imaging schemes have been demonstrated for high resolution or/and wide swath coverage. Different imaging modes usually require different imaging processors to focus their raw data. However, presented is a novel full-aperture imaging processor for different imaging modes. According to echo properties of different SAR imaging modes, a preprocessing step and a post-processing step are added to a modified accurate range migration algorithm processor. In addition to the advantage of being suitable for different imaging modes, this imaging processor is very efficient, since it avoids the large azimuth data extension to resolve the aliasing problem. Imaging results on simulated raw date validate the proposed imaging processor.

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