Analysis with C- and X-band satellite SAR data of the Portalet landslide area |
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| Authors: | Gerardo Herrera Davide Notti Juan Carlos Garc??a-Davalillo Oscar Mora Geraint Cooksley M??nica S??nchez Alain Arnaud Michele Crosetto |
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| Institution: | (1) ?rea de Peligrosidad y Riesgos Geol?gicos, Departamento de Investigaci?n y Prospectiva Geocient?fica, Instituto Geol?gico y Minero de Espa?a (IGME), c/ Alenza 1, 28003 Madrid, Spain;(2) Altamira Information, c/ C?rsega, 381-387, 08037 Barcelona, Spain;(3) Instituto de Geom?tica, Av. Canal Ol?mpic s/n, 08860 Castelldefels, Spain;(4) Earth Sciences Department, University of Pavia, Via Ferrata 1, 27100 Pavia, Italy |
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| 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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