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Interferometric Potential of High Resolution Spaceborne SAR Neue Möglichkeiten der SAR-Interferometrie durch hochauflösende Weltraum gestützte SAR-Systeme

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The new class of high resolution spaceborne SAR systems, like TerraSAR-X and COSMO-Skymed opens new possibilities for SAR interferometry. The 1m resolution is particularly helpful when 2D, 2.5D, 3D, or 4D (space-time) imaging of buildings and urban infrastructure is required, where the non-interferometric interpretation of SAR imagery is difficult. Structure and deformation of individual buildings can be mapped, rather than only coarse deformation patterns of areas. The paper demonstrates several new developments in high resolution SAR interferometry using TerraSAR-X as an example. Of particular interest is the very high resolution spotlight mode, which requires some care in interferometric processing. Results from interferometry, Persistent Scatterer Interferometry (PSI), and tomographic SAR in urban environment are presented. The high resolution of TerraSAR-X also supports accurate speckle and feature tracking. An example of glacier monitoring is shown and discussed.

Die neue Generation hochauflösender SAR-Satelliten, wie TerraSAR-X und COSMO-Skymed, eröffnen neue Möglichkeiten in der SAR-Interferometrie. Die Auflösung von ca. 1m wird vor allem benötigt, wenn Gebäude und urbane Infrastruktur 2-, 2,5-, 3- oder 4-dimensional abgebildet werden sollen. Gerade diese Objekte sind in nicht-interferometrischen SAR-Bildern schlecht zu interpretieren. So können nun Struktur und Deformation einzelner Gebäude interferometrisch aus dem Weltraum vermessen werden, wo bisher nur grobe Deformationsmuster einer Stadt erfassbar waren. In diesem Aufsatz werden mehrere neue Entwicklungen der hochauflösenden SAR-Interferometrie am Beispiel TerraSAR-X vorgestellt. Von besonderem Interesse sind dabei Daten aus dem Spotlight-Modus, deren interferometrische Verarbeitung erläutert wird. Ergebnisse aus Interferometrie, Persistent Scatterer Interferometrie (PSI) und SAR-Tomographie werden präsentiert. Die Anwendung von Speckle Tracking und Feature Tracking zur Erfassung von Gletscherbewegungen wird demonstriert.


Document Type: Research Article


Publication date: November 1, 2009

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  • Photogrammetrie - Fernerkundung - Geoinformation (PFG) is an international scholarly journal covering the progress and application of photogrammetric methods, remote sensing technology and the intricately connected field of geoinformation processing.

    Papers published in PFG highlight new developments and applications of these technologies in practice. The journal hence addresses both researchers and student of these disciplines at academic institutions and universities and the downstream users in both the private sector and public administration.

    PFG places special editorial emphasis on the communication of new methodologies in data acquisition, new approaches to optimized processing and interpretation of all types of data which were acquired by photogrammetric methods, remote sensing, image processing and the computer-aided interpretation of such data in general.

    PFG is the official journal of the German Society of Photogrammetry and Remote Sensing.
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