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|Title||Super-resolution SAR interferometry for landslide investigations|
|Investigator||Perski, Zbigniew - Polish Geological Institute - National Research Institute, Carpathian Branch|
|Summary||The proposed project is aimed to evaluate SAR interferometry performance with Staring SpotLight (ST) data in a context of landslide deformation measurements. SAR interferometry with spaceborne data at this spatial resolution level have not been available before therefore there are number of scientific issues that need to be evaluated. We believe that super-resolution deformation pattern obtained from InSAR can support landslide processes modeling on a level that was not available before and it can help us to fully understand variation of landslide velocity over the time and the triggering factors. We believe that the results of this research might help us to develop reliable landslide deformation prediction model. If successful, such approach might be in future use for operational services for critical area.
However, it is not clear what is the performance of traditional SAR interferometry and MTI (Multi-Temporal InSAR) methods with ST mode data over rugged mountain terrain and how reliable are InSAR measurements of ST mode data? Regarding to SAR data properties with such high resolution as provided by ST data, it is expected that more object will act as individual targets and thus different proportion between distributed targets and individual scatterers will be observed. High resolution ST data will also complicate interferometric processing. Apart from problems with Doppler, the correction for terrain topography should be considered. To properly and unambiguously remove topographic contribution a high resolution DEM should be applied.
Proposed research is focusing on SAR interferometry. We are going to use standard InSAR (differential interferograms) and MTI methods (Persistent Scatterers Interferometry - PSI and Small BAseline Subsets - SBAS) to process the data. The open source software platform will be used as a base for further modifications required towards to ST data processing chain within this project. All the tests and analysis will be carried out on the area of Just landslide in Southern Poland. It is the active, creeping landslide of up to 16 mm/yr displacement. It causing significant damages to the national road no 75 and houses. Continuous ground measurements are carried out by PGI-NRI team.
The field work and data processing over Just landslide will be funded by PGI-NRI in the framework of Carpathian landslide monitoring programme.
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