Journal
REMOTE SENSING
Volume 15, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/rs15051177
Keywords
satellite interferometry; COSMO-SkyMed; SBAS-DInSAR; MT-InSAR; deformation time series; damage assessment
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Satellite interferometry is a powerful tool for monitoring structural displacements. This paper proposes a methodology for remotely detecting displacements and assessing building criticalities using satellite interferometric data. The methodology was applied to a case study in Rome for an eight-year-long monitoring period.
Satellite interferometry has recently developed as a powerful tool for monitoring displacements on structures for structural health monitoring (SHM), as it allows obtaining information on past deformation and performing back analysis on structural behavior. Despite the increasing literature on this subject, the lack of protocols for applying and interpreting interferometric data for structural assessment prevents these techniques from being employed alongside conventional SHM. This paper proposes a methodology for exploiting satellite interferometric data aiming at remotely detecting displacements and buildings' criticalities at different levels of analysis, i.e., urban scale and single-building scale. Moreover, this research exploits the capability of satellite monitoring for damage diagnosis, comparing the millimeter scale displacements to information derived from on-site inspections. Different data-driven algorithms were applied to detect seasonal and irreversible components of displacements, such as statistical models for damage identification derived from traditional on-site monitoring. Thus, the proposed methodology was applied to a XVI-century case study located in the city center of Rome (Italy), Palazzo Primoli, and two stocks of COSMO-SkyMed (CSK) images processed through the Small BAseline Subset Differential Interferometry (SBAS-DInSAR) technique were used to assess displacements for an eight-year-long (between 2011 and 2019) monitoring period.
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