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Analysis of multistatic configurations for spaceborne SAR interferometry

Krieger, Gerhard and Fiedler, Hauke and Mittermayer, Josef and Papathanassiou, Konstantinos and Moreira, Alberto (2003) Analysis of multistatic configurations for spaceborne SAR interferometry. IEE Proceedings - Radar Sonar and Navigation, 150 (3), pp. 87-96. DOI: 10.1049/ip-rsn:20030441. ISSN Print: 1350-2395; Online: 1359-7086.

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Abstract

Spaceborne bistatic and multistatic SAR configurations are an attractive approach to acquire along-track and cross-track interferograms on a global scale. An efficient realisation of such systems may be achieved by a set of low-cost, passive receivers onboard a constellation of microsatellites which simultaneously record the backscattered signals transmitted by a conventional spaceborne radar. The authors introduce several multistatic SAR configurations suitable for global single-pass interferometry and discuss their advantages and limitations. The achievable interferometric performance is analysed in detail, taking into account thermal noise, block adaptive quantisation, range and azimuth ambiguities, and geometric decorrelation for both surface and random volume scatterers. Based on the estimated interferometric phase errors, the relative height accuracies for three illuminators (PALSAR, ASAR, TerraSAR-X) are derived. The achievable height accuracies are of the order of 2 m for PALSAR and ASAR, and of the order of 1 m for TerraSAR-X. However, it turns out that for vegetated areas, volume decorrelation may become a limiting factor for configurations with large interferometric baselines. These restrictions can be overcome by making the interferometric configuration fully polarimetric and/or increasing the number of available baselines.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2004,
Title:Analysis of multistatic configurations for spaceborne SAR interferometry
Authors:
AuthorsInstitution or Email of Authors
Krieger, GerhardUNSPECIFIED
Fiedler, HaukeUNSPECIFIED
Mittermayer, JosefUNSPECIFIED
Papathanassiou, KonstantinosUNSPECIFIED
Moreira, AlbertoUNSPECIFIED
Date:2003
Journal or Publication Title:IEE Proceedings - Radar Sonar and Navigation
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:150
DOI:10.1049/ip-rsn:20030441
Page Range:pp. 87-96
ISSN:Print: 1350-2395; Online: 1359-7086
Status:Published
Keywords:multistatic SAR, across-track interferometry, along-track interferometry, microsatellite constellation
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
Deposited By: Dr.-Ing. Gerhard Krieger
Deposited On:03 Feb 2006
Last Modified:06 Jan 2010 19:50

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