Along-track interferometry for simultaneous SAR and GMTI: application to Gotcha challenge data

Ross W. Deming

doi:10.1117/12.883282

4 May 2011 Along-track interferometry for simultaneous SAR and GMTI: application to Gotcha challenge data

Ross W. Deming

Proceedings Volume 8051, Algorithms for Synthetic Aperture Radar Imagery XVIII; 80510P (2011) https://doi.org/10.1117/12.883282
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

This paper describes several alternative techniques for detecting and localizing slowly-moving targets in cultural clutter using synthetic aperture radar (SAR) data. Here, single-pass data is jointly processed from two or more receive channels which are spatially offset in the along-track direction. We concentrate on two clutter cancelation methods known as the displaced phase center antenna (DPCA) technique and along-track SAR interferometry (AT-InSAR). Unlike the commonly-used space-time adaptive processing (STAP) techniques, both DPCA and AT-InSAR tend to perform well in the presence of non-homogeneous urban or mountainous clutter. We show, mathematically, the striking similarities between DPCA and AT-InSAR. Furthermore, we demonstrate using experimental SAR data that these two techniques yield complementary information, which can be combined into a "hybrid" technique that incorporates the advantages of each for significantly better performance. Results are generated using the Gotcha challenge data, acquired using a three-channel X-band spotlight SAR system.

Citation Download Citation

Ross W. Deming "Along-track interferometry for simultaneous SAR and GMTI: application to Gotcha challenge data", Proc. SPIE 8051, Algorithms for Synthetic Aperture Radar Imagery XVIII, 80510P (4 May 2011); https://doi.org/10.1117/12.883282

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