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Advanced Multi-Channel SAR Imaging - Measured Data Demonstration

Gebert, Nicolas and Almeida, Felipe and Krieger, Gerhard (2009) Advanced Multi-Channel SAR Imaging - Measured Data Demonstration. In: Proceedings of the International Radar Symposium (IRS), pp. 525-529. International Radar Symposium (IRS), 2009-09-09 - 2009-09-11, Hamburg, Germany.

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Abstract

Synthetic Aperture Radar (SAR) is a well-established technique for remote sensing of the Earth. However, conventional SAR systems relying on only a single transmit and receive aperture are not capable of imaging a wide swath with high spatial resolution. Multi-channel SAR concepts, such as systems based on multiple receive apertures in azimuth, promise to overcome these restrictions, thus enabling high-resolution wide-swath imaging. Analysis revealed that these systems imperatively require sophisticated digital processing of the received signals in order to guarantee full performance independently of the spatial sample distribution imposed by the applied pulse repetition frequency (PRF). A suitable algorithm to cope with these challenges of multi-channel data is given by the “multi-channel reconstruction algorithm”, which demonstrated in comprehensive analysis and system design examples its potential for high perform-ance SAR imaging. In this context, various optimization strategies were investigated and aspects of operating multi-channel systems in burst modes such as ScanSAR or TOPS were discussed. Furthermore, a first proof-of-principle showed the algorithm’s applicability to measured multi-channel X-band data gathered by the German Aerospace Cen-ter’s (DLR) airborne F-SAR system. As a next step in the framework of multi-channel azimuth processing, this paper builds on the results recalled above and continues two paths. Firstly, focus is turned to further optimization of the proc-essing algorithm by investigating the classical Space-Time Adaptive Processing (STAP) applied to SAR. Secondly, attention is turned to the analysis of the measured multi-channel data by elaborating the impact and compensation of channel mismatch and by verifying the derived theory.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Advanced Multi-Channel SAR Imaging - Measured Data Demonstration
Authors:
AuthorsInstitution or Email of Authors
Gebert, NicolasUNSPECIFIED
Almeida, FelipeUNSPECIFIED
Krieger, GerhardUNSPECIFIED
Date:September 2009
Journal or Publication Title:Proceedings of the International Radar Symposium (IRS)
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 525-529
Editors:
EditorsEmail
German Institute of Navigation - Deutsche Gesellschaft für Ortun, UNSPECIFIED
Series Name:International Radar Symposium (IRS) Proceedings
Status:Published
Keywords:High resolution Wide Swath SAR Imaging, HRWS, Digital Beamforming, Multi-Aperture SAR Processing, Multi-channel data, F-SAR, STAP
Event Title:International Radar Symposium (IRS)
Event Location:Hamburg, Germany
Event Type:international Conference
Event Dates:2009-09-09 - 2009-09-11
Organizer:German Institute of Navigation - Deutsche Gesellschaft für Ortung und Navigation e.V. (DGON)
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 > Radar Concepts
Microwaves and Radar Institute
Deposited By: Nicolas Gebert
Deposited On:24 Mar 2009
Last Modified:12 Dec 2013 20:36

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