TanDEM-X Mission: SAR Image Coregistration Aspects
Conference: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
06/07/2010 - 06/10/2010 at Aachen, Germany
Proceedings: EUSAR 2010
Pages: 4Language: englishTyp: PDF
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Authors:
Yague-Martinez, Nestor; Eineder, Michael; Brcic, Ramon; Breit, Helko; Fritz, Thomas (German Aerospace Center (DLR). Remote Sensing Technology Institute, Germany)
Abstract:
SAR image coregistration is of fundamental importance for accurate Digital Elevation Model (DEM) generation. In this paper the coregistration algorithm for the TanDEM-X Mission is presented. Because of the parallax, a range shift variation of several samples over range appears. The use of coregistration polynomials is not a suitable solution due to the high resolution of the system, therefore a new two-step algorithm is proposed: a geometrical a-priori shift estimation followed by an optimized signal-based method. Moreover, an outliers elimination module is described. Results with TerraSAR-X repeat-pass data are shown.