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System Concepts for Bi- and Multi-Static SAR Missions

Krieger, Gerhard and Fiedler, Hauke and Rodriguez Cassola, Marc and Hounam, David and Moreira, Alberto (2003) System Concepts for Bi- and Multi-Static SAR Missions. In: International Radar Symposium (IRS), pp. 331-339. German Institute of Navigation. International Radar Symposium (IRS), 2003-09-30 - 2003-10-02, Dresden, Germany.

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Abstract

The performance and capabilities of bi- and multistatic spaceborne synthetic aperture radar (SAR) are analyzed. Such systems can be optimized for a broad range of applications like frequent monitoring, wide swath imaging, single-pass cross-track interferometry, along-track interferometry, resolution enhancement or radar tomography. Further potentials arises from digital beamforming on receive, which allows to gather additional information about the direction of the scattered radar echoes. This directional information can be used to suppress interferences, to improve geometric and radiometric resolution, or to increase the unambiguous swath width. Furthermore, a coherent combination of multiple receiver signals will allow for a suppression of azimuth ambiguities. For this, a reconstruction algorithm is derived, which enables a recovery of the unambiguous Doppler spectrum also in case of non-optimum receiver aperture displacements leading to a non-uniform sampling of the SAR signal. This algorithm has also a great potential for systems relying on the displaced phase center (DPC) technique, like the high resolution wide swath (HRWS) SAR or the split antenna approach in the TerraSAR-X and Radarsat II satellites.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:System Concepts for Bi- and Multi-Static SAR Missions
Authors:
AuthorsInstitution or Email of Authors
Krieger, GerhardUNSPECIFIED
Fiedler, HaukeUNSPECIFIED
Rodriguez Cassola, MarcUNSPECIFIED
Hounam, DavidUNSPECIFIED
Moreira, AlbertoUNSPECIFIED
Date:September 2003
Journal or Publication Title:International Radar Symposium (IRS)
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 331-339
Publisher:German Institute of Navigation
Status:Published
Keywords:Digital Beamforming, Sparse Aperture SAR, Split Antenna, Nonuniform Sampling, Bistatic SAR, Multistatic SAR, DPCA Reconstruction
Event Title:International Radar Symposium (IRS)
Event Location:Dresden, Germany
Event Type:international Conference
Event Dates:2003-09-30 - 2003-10-02
Organizer:Deutsche Gesellschaft für Ortung und Navigation
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: Dr.-Ing. Gerhard Krieger
Deposited On:06 Jun 2006
Last Modified:12 Dec 2013 19:56

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