26 October 2016 Airborne SAR on circular trajectories to reduce layover and shadow effects of urban scenes
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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.
Conference Presentation
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Stephan Palm, Stephan Palm, Rainer Sommer, Rainer Sommer, Nils Pohl, Nils Pohl, Uwe Stilla, Uwe Stilla, } "Airborne SAR on circular trajectories to reduce layover and shadow effects of urban scenes", Proc. SPIE 10008, Remote Sensing Technologies and Applications in Urban Environments, 100080N (26 October 2016); doi: 10.1117/12.2242269; https://doi.org/10.1117/12.2242269
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