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Azimuth-invariant, bistatic airborne SAR processing strategies based on monostatic algorithms

Rodriguez Cassola, Marc and Krieger, Gerhard and Wendler, Michael (2005) Azimuth-invariant, bistatic airborne SAR processing strategies based on monostatic algorithms. In: Proceedings IGARSS 2005, 2, pp. 1047-1050. IEEE. IGARSS 2005, 2005-07-26, Seoul, South Korea. ISBN 0-7803-9051-2.

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Bistatic configurations have awakened a great deal of interest in the recent past among the SAR research community for both airborne and spaceborne sensing. However, bistatic SAR campaigns remain a technical challenge. In this context, current experiments are helping to understand real engineering problems concerning bistatic SAR data acquisitions. In February 2003, DLR and ONERA carried out successfully [1] one of the very first bistatic airborne campaigns. The E-SAR and RAMSES systems were flown in two basic geometrical configurations, both involving parallel flights at the same speed: one defined by along-track acquisitions and the other by across-track acquisitions. These bistatic configurations share with monostatic SAR the invariancy in the along-track dimension, which allows and suggests the using of Doppler domain focussing techniques. This paper puts forward an extension of airborne SAR monostatic focussing algorithms to the azimuth-invariant, bistatic case. A derivation of the point response in range-Doppler domain is presented; the differences between azimuth-invariant, bistatic and monostatic point responses are outlined. Using these results, bistatic focussing solutions based on range-Doppler (RD) [2] and extended chirp scaling (ECS) [3] algorithms are analysed. Particular implementation problems, like Doppler parameter estimation and bistatic motion compensation [4] strategies are also presented. Finally, the algorithms are tested with real data from the DLR-ONERA bistatic airborne campaign.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Azimuth-invariant, bistatic airborne SAR processing strategies based on monostatic algorithms
AuthorsInstitution or Email of Authors
Rodriguez Cassola, MarcUNSPECIFIED
Krieger, GerhardUNSPECIFIED
Wendler, MichaelUNSPECIFIED
Date:26 July 2005
Journal or Publication Title:Proceedings IGARSS 2005
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 1047-1050
Series Name:IEEE IGARSS Proceedings
Keywords:Bistatic SAR, bistatic SAR processing, airborne SAR processing, bistatic motion compensation
Event Title:IGARSS 2005
Event Location:Seoul, South Korea
Event Type:international Conference
Event Dates:2005-07-26
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Entwicklung eines Mini-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Marc Rodriguez Cassola
Deposited On:08 Feb 2006
Last Modified:27 Apr 2009 04:59

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