Abstract
This paper is focused on deformation monitoring using a Persistent Scatterer Interferometry technique and the interferometric SAR data acquired by the Sentinel-1 satellite of the European Space Agency. The first part of the paper describes the procedure used to process and analyze Sentinel-1 interferometric SAR data. Two main approaches are described. The first one is a simplified Persistent Scatterer Interferometry approach that exploits two key properties of the Sentinel-1 data: the high coherence of the 12-day interferograms and the reduced orbital tube. The second approach is a full Persistent Scatterer Interferometry approach, where a more sophisticate data treatment is employed. The second part of the paper illustrates the results obtained with the two processing approaches. Two case studies are described. The first one concerns landslide detection and monitoring. In this case, the simplified Persistent Scatterer Interferometry approach was used. The second one regards the deformation monitoring of an urban area. In this case, a full Persistent Scatterer Interferometry approach was used.
Highlights
Differential Interferometric SAR (DInSAR) is a powerful tool to detect and monitor ground deformation
This paper is focused on DInSAR and Persistent Scatterer Interferometry (PSI) for deformation monitoring using the SAR data acquired by the Sentinel-1 satellite of the European Space Agency
The advent, in 2007, of very high resolution X-band data enabled a major step forward in the PSI techniques, including the capability to generate a dense sampling of Persistent Scatterers (PSs), a higher sensitivity to small displacements and a remarkable quality improvement of the time series compared to the C-band (Crosetto et al, 2010), e.g. see Figure 1
Summary
Differential Interferometric SAR (DInSAR) is a powerful tool to detect and monitor ground deformation. This paper is focused on DInSAR and PSI for deformation monitoring using the SAR data acquired by the Sentinel-1 satellite of the European Space Agency. In the literature are described many examples of successful deformation monitoring results using different radar sensors, which demonstrated the DInSAR and PSI potential for a wide range of applications (Crosetto et al, 2016). A new significant improvement is expected to occur thanks to the data acquired by the sensor onboard the Sentinel-1 satellite This satellite, launched on 3 April 2014, acquires radar images in C-band and offers an improved data acquisition capability with respect to previous C-band sensors (ERS-1/2, Envisat and Radarsat), increasing considerably the deformation monitoring potential.
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