Abstract
Abstract. In recent years a new generation of high-resolution SAR satellites became operational like the Canadian Radarsat-2, the Italian Cosmo/Skymed, and the German TerraSAR-X systems. The spatial resolution of such devices achieves the meter domain or even below. Key products derived from remote sensing imagery are Digital Elevation Models (DEM). Based on SAR data various techniques can be applied for such purpose, for example, Radargrammetry (i.e., SAR Stereo) and SAR Interferometry (InSAR). In the framework of the ISPRS Working Group VII/2 "SAR Interferometry" a long term scientific project is conducted that aims at the validation of DEM derived from data of modern SAR satellite sensors. In this paper, we present DEM results yield for the city of Barcelona which were generated by means of SAR Interferometry.
Highlights
One major application of SAR is the generation of Digital Elevation Models (DEM)
The groups apply different techniques for DEM generation (Radargrammetry, standard InSAR, multi-baseline InSAR etc.) and the results shall be validated against high quality ground truth
Settlement areas are difficult terrain for SAR due to ubiquitous layover and occlusion issues attached to buildings. This leads to limited visibility of objects (Soergel et al, 2003), which decreases the number of correspondences for stereo analysis and increases the size of areas hard to handle in InSAR processing, for example, pure noise in shadow regions
Summary
This task can be accomplished by various techniques, for instance, SAR Stereo (e.g., Raggam et al, 2010) or SAR Interferometry (e.g., Bamler and Hartl, 1998) The former relies on matching correspondences in the magnitude images of complex SAR data, which requires the acquisitions been taken from unlike satellite tracks of sufficiently large viewing angle difference. Settlement areas are difficult terrain for SAR due to ubiquitous layover and occlusion issues attached to buildings This leads to limited visibility of objects (Soergel et al, 2003), which decreases the number of correspondences for stereo analysis and increases the size of areas hard to handle in InSAR processing, for example, pure noise in shadow regions. Instead we will exclusively focus on results obtained by means of SAR Interferometry
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