Anno di pubblicazione: 2012
[Was.ISL2012] J. Wasowski, F. Bovenga, Nitti D, R. Nutricato (2012). Investigating landslides with Persistent Scatterers Interferometry (PSI): current issues and challenges. In: (a cura di): Erik Eberhardt, Corey Froese, Keith Turner, S. Leroueil, Landslides and Engineered Slopes: Protecting Society through Improved Understanding. VOLUME 2: Simulating and managing rock fall. Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes. vol. 2, p. 1295-1301, CRC press, Taylor and Francis Group., ISBN: 978-0415621236.
Examples of slope and associated infrastructure instability assessments by PSI are presented to highlight current application opportunities related to i) the greater data availability offered by recent launches of radar satellites and ii) the improved capabilities of the new space-borne radar sensors (e.g. Cosmo-SkyMed, TerraSAR-X) in terms of resolution (from 3 to 1 m) and revisit time (from 11 to 4 days). Attention is drawn to the main factors that limit the general applicability of PSI in landslide investigations, to the difficulties in inferring the exact cause(s) of very slow displacements (mm-cm/ year) commonly registered on radar targets and to the risks of misinterpretation. Specific recommendations and guidelines are offered on how to mitigate PSI limitations and avoid erroneous interpretations. The utility of Google EarthTM tools for 3D visualization and preliminary reconnaissance analysis of PSI results is also emphasized.
Our efforts were in part supported by the Italian Space Agency (ASI) – Contract I/045/07/0. ENVI-SAT and TerraSAR-X data were provided, respec-tively, by the European Space Agency (ESA) under CAT-1 project ID 2653 and by the German Space Agency (DLR) under TerraSAR-X General AO Pro-ject ID MTH0432.