NON-INVASIVE METHODOLOGY FOR THE URBAN MONITORING BASED ON THE COMBINED USE OF INSAR, GBSAR AND RAR SENSORS: FROM THE SURFACE DEFORMATIONS TO SINGLE-BUILDING DYNAMICAL BEHAVIOUR

摘要

In this work, a non-invasive multi-spatial and multitemporal methodology to monitor urban areas and historic buildings is proposed to characterize environmental and building vulnerability in the context of a seismic/hydrogeological hazard prone area. The proposed approach is based on the combined use of Interferometric Synthetic Aperture Radar (SAR) and ground-based Real Aperture Radar (RAR) sensors. In detail, space-borne X-band COSMO-SkyMed SAR measurements are processed through a multi-temporal DInSAR technique to provide long-term (annual) mean surface displacement velocity maps at regional scale (tens km~2). Ku-band Ground-Based SAR (GBSAR) IBIS-L measurement campaigns are performed to retrieve the short-term (monthly) surface displacement map at local scale (hundreds m~2) using multi-temporal DInSAR algorithms. Finally, Ku-band GBRAR IBIS-S measurements are performed to estimate the vibration displacements and the natural oscillation frequencies of structures. The proposed methodology is tested and discussed for the historic center of Cosenza town and the ancient structure of Saint Augustine compound.