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Proceedings Paper

Airborne SAR on circular trajectories to reduce layover and shadow effects of urban scenes
Author(s): Stephan Palm; Rainer Sommer; Nils Pohl; Uwe Stilla
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Paper Abstract

Circular synthetic aperture radar (CSAR) can provide a full aspect coverage on interesting scenes in one run. Over the city of Karlsruhe a Ka-band dataset was generated in CSAR mode. The data was focused using subapertures in a step of 1.5°, each SAR image representing the scene from a slightly different aspect. The potential of non-coherent fusion of full aspect coverage to reveal small targets was demonstrated. By a manual selection of the viewing angle, parking cars next to high buildings could be revealed and a full view on selected targets with reduced shadow and overlay effects was shown. We studied the effect of varying aspects on the focused image pixels and developed a first metric to automatically select the best viewing angle to a local scene. Areas containing ground information like grass or asphalt and which are not hidden between high objects could be identified and used to deliver a good aspect view on neighboring areas which suffer from shadowing effects.

Paper Details

Date Published: 26 October 2016
PDF: 8 pages
Proc. SPIE 10008, Remote Sensing Technologies and Applications in Urban Environments, 100080N (26 October 2016); doi: 10.1117/12.2242269
Show Author Affiliations
Stephan Palm, Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik (Germany)
Rainer Sommer, Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik (Germany)
Nils Pohl, Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik (Germany)
Uwe Stilla, Technische Univ. München (Germany)

Published in SPIE Proceedings Vol. 10008:
Remote Sensing Technologies and Applications in Urban Environments
Thilo Erbertseder; Thomas Esch; Nektarios Chrysoulakis, Editor(s)

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