An innovative extraction methodology of active deformation areas based on sentinel-1 SAR dataset: the catalonia case study

Persistent scatterer interferometry (PSI) has been proved to be an advanced Interferometric Synthetic Aperture Radar (InSAR) technique used measure and monitor terrain deformation. Two of the critical problems with InSAR have effect refractive atmosphere decorrelation on interferometric phases due long spatial-temporal baseline. The low density persistent scatterers (PS) in non-urban areas affected by decoherence more seriously inspired development alternative approaches. Sentinel-1 (S1) improved data acquisition throughout, compared previous sensors, increased considerably differential SAR (DInSAR) PSI deformation monitoring potential. This paper describes innovative methodology process S1 data. Different PSI, its most original part includes two key processing stages: high frequency splitting from wrapped phases, prior atmospheric filtering, final direct integration generate complete time series containing linear nonlinear components. proposed method fundamental advantages traditional approach: results excellent coverage coherent points generation active maps even for serious short term break through inherent limitation PSI. effectiveness tools is illustrated using a case study located Catalonia (Spain). supposed definitive step towards implementation DInSAR based techniques support decision makers against geohazards. In this work, procedures happened three different (Spain) are presented analysed. maximum accumulated subsidence over – 60 cm induced mining activity can detected nice January 2017 2019. These reported cases illustrate how provide detailed geohazard complex topographical conditions. map generated fast aimed at risk early warning management.