An Application of Persistent Scatterer Interferometry (PSI) Technique for Infrastructure Monitoring

In the absence of systematic structural monitoring to support adequate maintenance standards, many existing infrastructures may reach unacceptable quality levels during their life cycle, resulting in significant damage and even potential failure. The metropolitan area Gulf Salerno (Italy), served by a complex multimodal transport network connecting port roads railways surrounding urban area, represents an important industrial commercial hub at local international scale. This particular scenario, developed morphological geological context, has led interference overlapping (highway, railway, main secondary roads) that run through piedmont north port. Given relevance our research aims highlight capabilities persistent scatterer interferometry (PSI) technique, belonging group differential interferometric synthetic aperture radar (SAR), extract space–temporal series displacements on ground points or artifacts with millimeter accuracy useful understand ongoing deformation processes. By using archived data from European Space Agency missions, i.e., ERS1/2 (European remote-sensing satellite) ENVISAT (environmental satellite), most recent COSMO-SkyMed constellations, it was possible collect 28-year dataset used spatially analyze displacement patterns site-specific scale check stability viaducts embankments, larger activity slopes. Despite different resolution subsequently density, analysis datasets showed spatiotemporal consistency concerned two subareas showing annual velocity trends, one northeast city second area. presented this paper highlights how geologic combining slope movements various fault systems, could be major concern for overlying infrastructure also role PSI can play remotely behavior over long periods time.