Abstract
This paper describes the use of the Stable Point Network technique, a Persistent Scatterer Interferometry SAR technique, for the analysis of the Portalet landslide area (Central Pyrenees, Spain). For this purpose, different SAR datasets acquired by ERS-1, ERS-2, ENVISAT and TerraSAR-X satellites have been analysed. The use of different SAR images acquired by satellite radar sensors operating at different microwave lengths has allowed for a comparative assessment and illustration of the advantages and disadvantages of these satellites for landslide detection and monitoring. In the introduction, differential interferometry and the study area are briefly described. Then the specifics of the SPN processing and the results of the different datasets are described and compared. In Analysis of the results: the Portalet landslide area, the Portalet landslide area is introduced and the radar displacement measurements are analysed with available geo-information data. Additionally, X-band measurements are compared with those gathered by a ground-based SAR for a previous project. Finally, the most relevant conclusions of this work are discussed.
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Acknowledgements
This work has been partially funded by the SPAINSLIDES element of the Terrafirma project of the Global Monitoring for Environment and Security programme from ESA, by the GALAHAD project, “Advanced Remote Monitoring Techniques for Glaciers, Avalanches and Landslides Hazard Mitigation” of the EU 6FP (Global Change and Ecosystems, Contract No. 018409), and by the Spanish Geological and Mining Institute (IGME) within project 2004051. The digital elevation model and aerial photographs used in this work have been provided by the Cartographical Service of the Government of Aragón (Spain). The GB-SAR results shown in this paper were acquired by the Department of Electronics and Telecommunications of the University of Florence (Italy) in the framework of the GALAHAD project. The TerraSAR-X data used were provided as part of the DLR science service (proposal MTH0263).
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Herrera, G., Notti, D., García-Davalillo, J.C. et al. Analysis with C- and X-band satellite SAR data of the Portalet landslide area. Landslides 8, 195–206 (2011). https://doi.org/10.1007/s10346-010-0239-3
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DOI: https://doi.org/10.1007/s10346-010-0239-3