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This paper presents the first demonstration of high precision very high resolution tomographic SAR inversion with the assistance of\udTanDEM-X data. The data quality of TerraSAR-X and TanDEM-X is investigated. TomoSAR algorithms such as SVD-Wiener,\udNonlinear Least Squares and SL1MMER are extended for mixed repeat- and single-pass data stacks. A systematic approach is\udproposed for the fusion of TerraSAR-X and TanDEM-X data in which the different data quality provided by the TerraSAR-X and\udTanDEM-X data are taken into account by introducing a weighting according to the noise covariance matrix. The proposed approach\udis evaluated with simulated data. The simulation result shows that the reconstruction accuracy of tomographic SAR inversion can be\udimproved significantly by using jointly fused TerraSAR-X and TanDEM-X data

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

TOMOGRAPHIC SAR INVERSION FROM MIXED REPEAT- AND SINGLE-PASS DATA STACKS – THE TERRASAR-X/TANDEM-X CASE