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Proceedings Paper

Experimental and theoretical validation of a GTD-based SAR simulator
Author(s): Shahram Tajbakhsh; Ronald E. Burge; S. Mojir-Shaybani; Min-Joon Kim; H. M. Berenyi
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Paper Abstract

In previous paper, a ray-racing model for urban SAR imaging and simulation was described in which a physical optics extension of the geometrical theory of diffraction (GTD) was used to include diffraction returns in calculating the specular backscatter from the scene. This theory is based on that the most important contributions towards the scattered field come from an area in the neighborhood of some critical points on the scattering surface. For a planar surface, three critical points may be regarded; specular, edge- diffraction and corner-diffraction points. A physical optics version of PoGTD was taken with the approximate diffraction coefficients derived using physical optics approximations to canonical problems. The results from the simulator are examined and validated by comparing them with theoretical and experimental results calculated and found in an annerchaic chamber using simple targets. The objects were chosen to cover different combination of the critical points, i.e. specular, edge- and vertex-diffraction which contribute towards the backscattered field. For both set of data the co-polarized data are presented and compared.

Paper Details

Date Published: 17 December 1996
PDF: 16 pages
Proc. SPIE 2958, Microwave Sensing and Synthetic Aperture Radar, (17 December 1996); doi: 10.1117/12.262701
Show Author Affiliations
Shahram Tajbakhsh, King's College London (United Kingdom)
Ronald E. Burge, King's College London (United Kingdom)
S. Mojir-Shaybani, King's College London (United Kingdom)
Min-Joon Kim, Univ. College London (United Kingdom)
H. M. Berenyi, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 2958:
Microwave Sensing and Synthetic Aperture Radar
Giorgio Franceschetti; Christopher John Oliver; Franco S. Rubertone; Shahram Tajbakhsh, Editor(s)

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