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Proceedings Paper

Geometrical optics analysis of clear-air refractive-index perturbations on SAR images
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Paper Abstract

Previous papers have demonstrated that anomalies observed in synthetic aperture radar (SAR) images can be attributed to perturbations in the clear-air refractive index. The atmospheric effect is small, and is more frequent, or apparent, in long range imaging. A geometrical optics (ray-trace) analysis is applied to potential atmospheric perturbations. The results correlate with observations, and demonstrate that the effect is strongly dependent on the azimuth orientation of the atmospheric perturbation. The analysis also demonstrates that the magnitudes of the spatial size of the anomalies and index perturbations can be much smaller than expected.

Paper Details

Date Published: 8 May 2006
PDF: 12 pages
Proc. SPIE 6210, Radar Sensor Technology X, 621003 (8 May 2006); doi: 10.1117/12.668326
Show Author Affiliations
Richard N. Shagam, Sandia National Labs. (United States)
Fred M. Dickey, Sandia National Labs. (United States)
Armin W. Doerry, Sandia National Labs. (United States)


Published in SPIE Proceedings Vol. 6210:
Radar Sensor Technology X
Robert N. Trebits; James L. Kurtz, Editor(s)

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