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Motion measurement errors and autofocus in bistatic SAR

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2 Author(s)
Rigling, B.D. ; Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA ; Moses, R.L.

This paper discusses the effect of motion measurement errors (MMEs) on measured bistatic synthetic aperture radar (SAR) phase history data that has been motion compensated to the scene origin. We characterize the effect of low-frequency MMEs on bistatic SAR images, and, based on this characterization, we derive limits on the allowable MMEs to be used as system specifications. Finally, we demonstrate that proper orientation of a bistatic SAR image during the image formation process allows application of monostatic SAR autofocus algorithms in postprocessing to mitigate image defocus.

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Image Processing, IEEE Transactions on  (Volume:15 ,  Issue: 4 )