Spectral replacement to mitigate interference for multi-pass synthetic aperture radar
| DWPI Title: System for mitigating interference artifacts in multi-pass synthetic aperture radar image, has processor for replacing data in first synthetic aperture radar phase history with data in second synthetic aperture radar phase history |
| Abstract: Various technologies for mitigating interference artifacts in multi-pass synthetic aperture radar (SAR) imagery are described herein. First and second phase histories corresponding to first and second SAR passes over a scene are processed in image and phase-history domains to correct for spatially-variant and constant phase offsets between the phase histories that can be caused by known and unknown variations in motion of a SAR platform between passes. Data samples from one phase history can then be replaced with data samples from the other phase history to remove artifacts and distortions caused by sources of interference in the scene. |
| Use: System for mitigating interference artifacts in a multi-pass SAR image. |
| Advantage: The system can mitigate artifacts and distortion caused by filtering interference by replacing data generated during a first pass of the SAR platform traversing an area of interest with data generated during a second pass of the SAR platform traversing the area of interest. |
| Novelty: The system (100) has a processor (110) for re-sampling first synthetic aperture radar (SAR) phase history and second SAR phase history to a common coordinate system in responsive to receiving a first SAR phase history of a scene corresponding to a first pass of a SAR platform (102) and a second SAR phase history of the scene corresponding to a second pass of the SAR platform. The processor applies spatially-variant phase correction to a first image. The processor applies constant phase correction to third SAR phase history and replaces first data in the phase-corrected third SAR phase history with second data in the re-sampled second SAR phase history. |
| Filed: 11/15/2016 |
| Application Number: US15351949A |
| Tech ID: SD 13587.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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