Verification of target motion effects on SAR imagery using the Gotcha GMTI challenge dataset

Dan E. Hack; Michael A. Saville

doi:10.1117/12.850565

18 April 2010 Verification of target motion effects on SAR imagery using the Gotcha GMTI challenge dataset

Dan E. Hack, Michael A. Saville

Proceedings Volume 7699, Algorithms for Synthetic Aperture Radar Imagery XVII; 76990K (2010) https://doi.org/10.1117/12.850565
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

This paper investigates the relationship between a ground moving target's kinematic state and its SAR image. While effects such as cross-range offset, defocus, and smearing appear well understood, their derivations in the literature typically employ simplifications of the radar/target geometry and assume point scattering targets. This study adopts a geometrical model for understanding target motion effects in SAR imagery, termed the target migration path, and focuses on experimental verification of predicted motion effects using both simulated and empirical datasets based on the Gotcha GMTI challenge dataset. Specifically, moving target imagery is generated from three data sources: first, simulated phase history for a moving point target; second, simulated phase history for a moving vehicle derived from a simulated Mazda MPV X-band signature; and third, empirical phase history from the Gotcha GMTI challenge dataset. Both simulated target trajectories match the truth GPS target position history from the Gotcha GMTI challenge dataset, allowing direct comparison between all three imagery sets and the predicted target migration path. This paper concludes with a discussion of the parallels between the target migration path and the measurement model within a Kalman filtering framework, followed by conclusions.

Citation Download Citation

Dan E. Hack and Michael A. Saville "Verification of target motion effects on SAR imagery using the Gotcha GMTI challenge dataset", Proc. SPIE 7699, Algorithms for Synthetic Aperture Radar Imagery XVII, 76990K (18 April 2010); https://doi.org/10.1117/12.850565

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