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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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.
|Title:||Analysis of multistatic configurations for spaceborne SAR interferometry|
|Journal or Publication Title:||IEE Proceedings - Radar Sonar and Navigation|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 87-96|
|ISSN:||Print: 1350-2395; Online: 1359-7086|
|Keywords:||multistatic SAR, across-track interferometry, along-track interferometry, microsatellite constellation|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|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)|
|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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