CAPS: A New Method for the Identification of Different Surface Displacements in Landslide and Subsidence Environments through Correlation Analysis on Persistent Scatterers Time-Series from PSI

Persistent Scatterer Interferometry (PSI) is one of the most powerful tools for identifying and monitoring areas exposed to surface deformations such as landslides or subsidence. In this work, we propose a new method that named CAPS (Correlation Analysis on Scatterers), extend capability PSI in recognizing characterising influenced by complex ground differential motions. must be applied both ascending descending orbits separately comprises three major steps: (i) calculating cross-correlation matrix detrended PS time-series; (ii) extracting pairs with similarity greater than given threshold; (iii) grouping families sorting classification. Thus, orbits, Families identify groups similar movements. This allows distinguishing sectors characterised different displacements over time even LOS (Line Sight) velocities. As test sites, considered four known geological scenarios: two representing landslide environments (Santo Stefano d’Aveto Arzeno, Liguria, NW Italy) subsidence (Rome Venice, urban surrounding areas). proved versatile, applicable situations at scales observation, regional local deformations.