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On ambiguities in SAR design

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dc.contributor.author Freeman, Anthony
dc.date.accessioned 2006-09-11T22:08:17Z
dc.date.available 2006-09-11T22:08:17Z
dc.date.issued 2006-05-16
dc.identifier.citation EUSAR 2006: 6th European Conference on Synthetic Aperture Rada, Dresden, Germany, May 16-18, 2006. en
dc.identifier.clearanceno 06-1066
dc.identifier.uri http://hdl.handle.net/2014/39753
dc.description.abstract Ambiguities are an aliasing effect caused by the periodic sampling of the scene backscatter inherent to pulsed radar systems such as Synthetic Aperture radar (SAR). In this paper we take a fresh look at the relationship between SAR range and azimuth ambiguity constraints on the allowable pulse repetition frequency (PRF) and the antenna length. We show that for high squint angles smaller antennas may be feasible in some cases. For some applications, the ability to form a synthetic aperture at high squint angles is desirable, but the size of the antenna causes problems in the design of systems capable of such operation. This is because the SAR system design is optimized for a side-looking geometry. In two examples design examples we take a suboptimum antenna size and examine the performance in terms of azimuth resolution and swath width as a function of squint angle. We show that for stripmap SARs, the swath width is usually worse for off-boresight squint angles, because it is severely limited by range walk, except in cases where we relax the spatial resolution. We consider the implications for the design of modest-resolution, narrow swath, scanning “SAR scatterometers”. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 478615 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006. en
dc.subject ambiguities en
dc.subject Synthetic Aperture radar (SAR) en
dc.title On ambiguities in SAR design en
dc.type Preprint en


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