Geodetic SAR Tomography

Zhu, Xiao Xiang; Montazeri, Sina; Gisinger, Christoph; Hanssen, R.F.; Bamler, Richard

doi:10.1109/TGRS.2015.2448686

Geodetic SAR Tomography

Title

Geodetic SAR Tomography

Author

Zhu, Xiao Xiang (Technische Universität München)
Montazeri, Sina (Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR))
Gisinger, Christoph (Technische Universität München)
Hanssen, R.F. (TU Delft Mathematical Geodesy and Positioning)
Bamler, Richard (Technische Universität München)

Date

2016-01-01

Abstract

In this paper, we propose a framework referred to as 'geodetic synthetic aperture radar (SAR) tomography' that fuses the SAR imaging geodesy and tomographic SAR inversion (TomoSAR) approaches to obtain absolute 3-D positions of a large amount of natural scatterers. The methodology is applied on four very high resolution TerraSAR-X spotlight image stacks acquired over the city of Berlin. Since all the TomoSAR estimates are relative to the same reference point object whose absolute 3-D positions are retrieved by means of stereo SAR, the point clouds reconstructed using data acquired from different viewing angles can be geodetically fused. To assess the accuracy of the position estimates, the resulting absolute shadow-free 3-D TomoSAR point clouds are compared with a digital surface model obtained by airborne LiDAR. It is demonstrated that an absolute positioning accuracy of around 20 cm and a meter-order relative positioning accuracy can be achieved by the proposed framework using TerraSAR-X data.

Subject

Absolute positioning
geodetic SAR tomography
geodetical fusion
SAR geodesy
SAR tomography
stereo SAR
synthetic aperture radar (SAR)
TerraSAR-X

To reference this document use:

http://resolver.tudelft.nl/uuid:23faf754-6806-473d-913d-ada9b52739c7

DOI

https://doi.org/10.1109/TGRS.2015.2448686

ISSN

0196-2892

Source

IEEE Transactions on Geoscience and Remote Sensing, 54 (1), 18-35

Part of collection

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