SAR through a dispersive dielectric layer

Margaret Cheney; Clifford J. Nolan

doi:10.1117/12.540507

2 September 2004 SAR through a dispersive dielectric layer

Margaret Cheney, Clifford J. Nolan

Proceedings Volume 5427, Algorithms for Synthetic Aperture Radar Imagery XI; (2004) https://doi.org/10.1117/12.540507
Event: Defense and Security, 2004, Orlando, Florida, United States

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.

Citation Download Citation

Margaret Cheney and Clifford J. Nolan "SAR through a dispersive dielectric layer", Proc. SPIE 5427, Algorithms for Synthetic Aperture Radar Imagery XI, (2 September 2004); https://doi.org/10.1117/12.540507

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