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.     «

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 a...     »

absolute positioning, Absolute positioning, absolute positioning accuracy, Atmospheric modeling, Azimuth, Berlin city, free 3-D TomoSAR point clouds, geodetic SAR tomography, Geodetic SAR tomography, geodetical fusion, geodetically fused, Geometry, geophysical image processing, Image reconstruction, meter-order relative positioning accuracy, Orbits, point clouds reconstruction, radar imaging, reference point object stereo SAR, remote sensing by radar, SAR geodesy, SAR Geodesy, SAR imaging geodesy, SAR tomography, stereo SAR, stereo-SAR, Synthetic aperture radar, synthetic aperture radar (SAR), TerraSAR-X, TerraSAR-X data, TerraSAR-X spotlight image stacks, Three-dimensional displays, tomographic SAR inversion, tomography, TomoSAR     «

absolute positioning, Absolute positioning, absolute positioning accuracy, Atmospheric modeling, Azimuth, Berlin city, free 3-D TomoSAR point clouds, geodetic SAR tomography, Geodetic SAR tomography, geodetical fusion, geodetically fused, Geometry, geophysical image processing, Image reconstruction, meter-order relative positioning accuracy, Orbits, point clouds reconstruction, radar imaging, reference point object stereo SAR, remote sensing by radar, SAR geodesy, SAR Geodesy, SAR imaging geodes...     »