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Proceedings Paper

Joint space aspect reconstruction of wide-angle SAR exploiting sparsity
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Paper 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 Most prominently, the isotropic point scattering model is no longer valid.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.

Paper Details

Date Published: 15 April 2008
PDF: 12 pages
Proc. SPIE 6970, Algorithms for Synthetic Aperture Radar Imagery XV, 697005 (15 April 2008); doi: 10.1117/12.786288
Show Author Affiliations
Ivana Stojanovic, Boston Univ. (United States)
Mujdat Cetin, Sabanci Univ. (Turkey)
William C. Karl, Boston Univ. (United States)


Published in SPIE Proceedings Vol. 6970:
Algorithms for Synthetic Aperture Radar Imagery XV
Edmund G. Zelnio; Frederick D. Garber, Editor(s)

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