Evaluation of the SBAS InSAR Service of the European Space Agency’s Geohazard Exploitation Platform (GEP)

Jorge Pedro Galve, José Vicente Pérez-Peña, José Miguel Azañón, Damien Closson, Fabiana Caló, Cristina Reyes-Carmona, Antonio Jabaloy, Patricia Ruano, Rosa María Mateos, Davide Notti, Gerardo Herrera, Marta Béjar-Pizarro, Oriol Monserrat, Philippe Bally, 2017, Evaluation of the SBAS InSAR Service of the European Space Agency’s Geohazard Exploitation Platform (GEP), Remote sensing (Basel) 9 (2017). doi_10.3390/rs9121291,
URL: http://www.cnr.it/prodotto/i/381087

The analysis of remote sensing data to assess geohazards is being improved by web-based platforms and collaborative projects, such as the Geohazard Exploitation Platform (GEP) of the European Space Agency (ESA). This paper presents the evaluation of a surface velocity map that is generated by this platform. The map was produced through an unsupervised Multi-temporal InSAR (MTI) analysis applying the Parallel-SBAS (P-SBAS) algorithm to 25 ENVISAT satellite images from the South of Spain that were acquired between 2003 and 2008. This analysis was carried out using a service implemented in the GEP called "SBAS InSAR". Thanks to the map that was generated by the SBAS InSAR service, we identified processes not documented so far; provided new monitoring data in places affected by known ground instabilities; defined the area affected by these instabilities; and, studied a case where GEP could have been able to help in the forecast of a slope movement reactivation. This amply demonstrates the reliability and usefulness of the GEP, and shows how web-based platforms may enhance the capacity to identify, monitor, and assess hazards that are associated to geological processes.

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