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Proceedings Article

Joint space aspect reconstruction of wide-angle SAR exploiting sparsity

[+] Author Affiliations
Ivana Stojanovic, William C. Karl

Boston Univ.

Mujdat Cetin

Sabanci Univ. (Turkey)

Proc. SPIE 6970, Algorithms for Synthetic Aperture Radar Imagery XV, 697005 (April 15, 2008); doi:10.1117/12.786288
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From Conference Volume 6970

  • Algorithms for Synthetic Aperture Radar Imagery XV
  • Edmund G. Zelnio; Frederick D. Garber
  • Orlando, FL | March 16, 2008

abstract

In this paper we present an algorithm for wide-angle synthetic aperture radar (SAR) image formation. Reconstruction of wide-angle SAR holds a promise of higher resolution and better information about a scene, but it also poses a number of challenges when compared to the traditional narrow-angle SAR. Most prominently, the isotropic point scattering model is no longer valid. We present an algorithm capable of producing high resolution reflectivity maps in both space and aspect, thus accounting for the anisotropic scattering behavior of targets. We pose the problem as a non-parametric three-dimensional inversion problem, with two constraints: magnitudes of the backscattered power are highly correlated across closely spaced look angles and the backscattered power originates from a small set of point scatterers. This approach considers jointly all scatterers in the scene across all azimuths, and exploits the sparsity of the underlying scattering field. We implement the algorithm and present reconstruction results on realistic data obtained from the XPatch Backhoe dataset.

© (2008) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Ivana Stojanovic ; Mujdat Cetin and William C. Karl
"Joint space aspect reconstruction of wide-angle SAR exploiting sparsity", Proc. SPIE 6970, Algorithms for Synthetic Aperture Radar Imagery XV, 697005 (April 15, 2008); doi:10.1117/12.786288; http://dx.doi.org/10.1117/12.786288


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