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Synthetic aperture radar tomography, or volume imaging with a side-looking radar uses a two-dimensional aperture made of several antenna paths along more or less parallel trajectories. The carrier motion providing the along track extension of the aperture, and the across-track extension is provided by multiple cross-track antenna or by repeated acquisition along parallel lines. The relative position...
In this article three GMTI (Ground Moving Target Indication) algorithms are presented. The algorithms are based on ATI (Along Track Interferometry) signal and show different approaches to moving target indication. The details of each algorithm and results of real radar data processing are presented. Computational complexity of each algorithm is discussed. Plans for future research are outlined.
Classical ISAR imaging usually is based on the polar re-formatting algorithm making use of the fast Fourier transform. If the observed aspect angle change is large enough, several partial segments can be processed separately, the resulting partial images can be summed incoherently to a multi-look image with reduced noise and speckle level and exhibiting more details, since some parts of the objects...
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