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Proceedings Paper

SAR through a dispersive dielectric layer
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Paper Abstract

This paper develops a method for forming a synthetic-aperture image of a flat surface seen through a homogeneous layer of a material that is dispersive, i.e., its wave speed varies with frequency. We outline first a simplified scalar model for electromagnetic wave propagation in a dispersive medium; the resulting equation could also be used for acoustics. We show that the backscattered signal can be viewed as a Fourier integral operator applied to the ground reflectivity funciton. The reconstruction method, which is based on backprojection, can be used for arbitrary sensor paths and corrects for the radiated beam pattern, the source waveform, and geometrical spreading factors. The method correctly reconstructs the singularities (such as edges) that are visible from the sensor.

Paper Details

Date Published: 2 September 2004
PDF: 10 pages
Proc. SPIE 5427, Algorithms for Synthetic Aperture Radar Imagery XI, (2 September 2004); doi: 10.1117/12.540507
Show Author Affiliations
Margaret Cheney, Rensselaer Polytechnic Institute (United States)
Clifford J. Nolan, Univ. of Limerick (Ireland)


Published in SPIE Proceedings Vol. 5427:
Algorithms for Synthetic Aperture Radar Imagery XI
Edmund G. Zelnio; Frederick D. Garber, Editor(s)

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