Abstract
Abstract. Modern spaceborne SAR sensors like TerraSAR-X offer ground resolution of up to one meter in range and azimuth direction. Buildings, roads, bridges, and other man-made structures appear in such data often as regular patterns of strong and temporally stable points (Persistent Scatterer, PS). As one step in the process of unveiling what object structure actually causes the PS (i.e., physical nature) we compare those regular structures in SAR data to their correspondences in optical imagery. We use lattices as a common data representation for visible facades. By exploiting the topology information given by the lattices we can complete gaps in the structures which is one step towards the understanding of the complex scattering characteristics of distinct facade objects.
Highlights
The most prominent motivation for the fusion of SAR and optical data is the combination of the advantages of both sensor types
Due to the oblique sensing geometry, especially facades are visible in SAR acquisitions as well as in oblique aerial imagery considering urban areas
Since modern spaceborne SAR sensors like TerraSAR-X or CosmoSkyMed offer ground resolutions of up to one meter in range and azimuth direction, facade objects like single windows or balconies can be distinguished as separate Persistent Scatterers
Summary
The most prominent motivation for the fusion of SAR and optical data is the combination of the advantages of both sensor types. Since modern spaceborne SAR sensors like TerraSAR-X or CosmoSkyMed offer ground resolutions of up to one meter in range and azimuth direction, facade objects like single windows or balconies can be distinguished as separate Persistent Scatterers. Those points are temporally stable and do have a dominant contribution to the signal of it’s resolution cell (Ferretti et al, 2001). Rows along facade structures of the same height as well as regularites along consecutive levels are recognizable To determine the subset of PS belonging to regular facade structures means to conclude for all points if they are part of a lattice or not
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