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Video Synthetic Aperture Radar (ViSAR) is a novel technique to continuously monitor moving targets in the interested area. From the video echo provided by the ViSAR system, the motion trail of the moving target can be easily obtained. Therefore, the echo of the moving target should be carefully studied, which is important in practical application for moving targets tracking in ViSAR system.
In this letter, we suggest using multiple azimuth channels (MACs) for synthetic aperture radar in the sliding spotlight mode. First, we analyze the scene size constraints of conventional sliding spotlight mode, showing that a large scene size requires long scene illumination time. However, while using multiple channels in azimuth, this could be changed. Dividing a long antenna into small antennas,...
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