Abstract
This study is focused on wide-area deformation monitoring initiatives based on the differential interferometric SAR technique (DInSAR). In particular, it addresses the use of advanced DInSAR (A-DInSAR) techniques, which are based on large sets of synthetic aperture radar (SAR) and Copernicus Sentinel-1 images. Such techniques have undergone a dramatic development in the last twenty years: they are now capable to process big sets of SAR images and can be exploited to realize a wide-area A-DInSAR monitoring. The study describes several initiatives to establish wide-area ground motion services (GMS), both at county- and region-level. In the second part of the study, some of the key technical aspects related to wide-area A-DInSAR monitoring are discussed. Finally, the last part of the study is devoted to the European ground motion service (EGMS), which is part of the Copernicus land monitoring service. It represents the most important wide-area A-DInSAR deformation monitoring system ever developed. The study describes its main characteristics and its main products. The end of the production of the first EGMS baseline product is foreseen for the last quarter of 2021.
Highlights
Differential interferometric synthetic aperture radar (SAR) (DInSAR) is a remote sensing technique, based on satellite radar imagery, for the deformation measurement and monitoring of land, structures and infrastructures.This study mainly refers to advanced differential interferometric SAR technique (DInSAR) (A-DInSAR) techniques, which are based on large stacks of SAR images and appropriate tools to process them [1,2,3]
It addresses the use of advanced DInSAR (A-DInSAR) techniques, which are based on large sets of synthetic aperture radar (SAR) and Copernicus Sentinel-1 images
This study mainly refers to advanced DInSAR (A-DInSAR) techniques, which are based on large stacks of SAR images and appropriate tools to process them [1,2,3]
Summary
Differential interferometric SAR (DInSAR) is a remote sensing technique, based on satellite radar imagery, for the deformation measurement and monitoring of land, structures and infrastructures. It can measure past deformation phenomena, exploiting the SAR image historical archives It is a non-invasive technique and it enables a potential reduction of the amount of ground-based deformation observations, allowing economic savings. A-DInSAR is moving from local deformation studies, typically at the size of single image frames, to wide-area multiple-frame monitoring projects, exploiting the full potential of the satellite-based SAR data [10,11,12]. A European initiative started in 2016 to implement a A-DInSAR-based European ground motion service (EGMS) and to provide consistent A-DInSAR data at a continental scale [13]. The main characteristics of the EGMS are described, followed by some conclusive remarks
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