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Geosciences 2017, 7(2), 19; doi:10.3390/geosciences7020019

Assessing the Feasibility of a National InSAR Ground Deformation Map of Great Britain with Sentinel-1

1
British Geological Survey, Nicker Hill, Keyworth NG12 5GG, UK
2
Formerly at British Geological Survey, Nicker Hill, Keyworth NG12 5GG, UK
3
Department of Earth Sciences, Environment and Resources, Federico II University of Naples, Naples 80138, Italy
4
Geomatic Ventures Limited, Nottingham Geospatial Building, Nottingham NG7 2TU, UK
5
University of Nottingham, Nottingham Geospatial Building, Nottingham NG7 2TU, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Ruiliang Pu and Jesus Martinez-Frias
Received: 27 February 2017 / Revised: 24 March 2017 / Accepted: 27 March 2017 / Published: 30 March 2017
(This article belongs to the Special Issue Observing Geohazards from Space)
View Full-Text   |   Download PDF [38689 KB, uploaded 30 March 2017]   |  

Abstract

This work assesses the feasibility of national ground deformation monitoring of Great Britain using synthetic aperture radar (SAR) imagery acquired by Copernicus’ Sentinel-1 constellation and interferometric SAR (InSAR) analyses. As of December 2016, the assessment reveals that, since May 2015, more than 250 interferometric wide (IW) swath products have been acquired on average every month by the constellation at regular revisit cycles for the entirety of Great Britain. A simulation of radar distortions (layover, foreshortening, and shadow) confirms that topographic constraints have a limited effect on SAR visibility of the landmass and, despite the predominance of rural land cover types, there is potential for over 22,000,000 intermittent small baseline subset (ISBAS) monitoring targets for each acquisition geometry (ascending and descending) using a set of IW image frames covering the entire landmass. Finally, InSAR results derived through ISBAS processing of the Doncaster area with an increasing amount of Sentinel-1 IW scenes reveal a consistent decrease of standard deviation of InSAR velocities from 6 mm/year to ≤2 mm/year. Such results can be integrated with geological and geohazard susceptibility data and provide key information to inform the government, other institutions and the public on the stability of the landmass. View Full-Text
Keywords: InSAR; Sentinel-1; geohazards InSAR; Sentinel-1; geohazards
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Novellino, A.; Cigna, F.; Brahmi, M.; Sowter, A.; Bateson, L.; Marsh, S. Assessing the Feasibility of a National InSAR Ground Deformation Map of Great Britain with Sentinel-1. Geosciences 2017, 7, 19.

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