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Proceedings Paper

Synthetic Aperture Radar: A Kelvin Wake Image Artifact
Author(s): Robert O. Harger
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Paper Abstract

Synthetic Aperture Radar (SAR) images of ship wakes have, under calm wind conditions, contained a "narrow vee" artifact of included angle small relative to that of the Kelvin wake envelope. Identified here is a physical source for some of these image artifacts- namely the divergent part of the Kelvin wake system. The SAR images a part of this wave subsystem via a Bragg scattering mechanism, resulting in a narrow vee artifact when the ship and SAR platform directions sufficiently agree. This artifact disappears when surface roughness is present, as with a local breeze, in conformance with observation. The predicted "down-axis" attenuation rate agrees with actual measurements from SAR imagery. A brief comparison of actual SAR images with a those of a simplified SAR simulation is discussed.

Paper Details

Date Published: 14 August 1989
PDF: 10 pages
Proc. SPIE 1101, Millimeter Wave and Synthetic Aperture Radar, (14 August 1989); doi: 10.1117/12.960529
Show Author Affiliations
Robert O. Harger, University of Maryland (United States)

Published in SPIE Proceedings Vol. 1101:
Millimeter Wave and Synthetic Aperture Radar
G. Keith Huddleston; Martin E. Tanenhaus; Brian P. Williams, Editor(s)

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