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Open AccessFeature PaperArticle

A Persistent Scatterer Interferometry Procedure Based on Stable Areas to Filter the Atmospheric Component

1
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Division of Geomatics, Av. Gauss 7, E-08860 Castelldefels (Barcelona), Spain
2
Institute of Geodesy, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 1, 10-719 Olsztyn, Poland
3
Institute of Environmental Assessment and Water Research (IDAEA), CSIC, c/Jordi Girona 18, 08034 Barcelona, Spain
4
Department of Earth Sciences, University of Milan, Via Cicognara 7, I-20129 Milan, Italy
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(11), 1780; https://doi.org/10.3390/rs10111780
Received: 6 October 2018 / Revised: 7 November 2018 / Accepted: 8 November 2018 / Published: 10 November 2018
This paper describes a Persistent Scatterer Interferometry (PSI) procedure to monitor the land deformation in an urban area induced by aquifer dewatering and the consequent drawdown of the water table. The procedure, based on Sentinel-1 data, is illustrated considering the construction works of Glories Square, Barcelona (Spain). The study covers a period from March 2015 to November 2017, which includes a dewatering event in spring 2017. This paper describes the proposed procedure, whose most original part includes the estimation of the atmospheric phase component using stable areas located in the vicinity of the monitoring area. The performances of the procedure are analysed, characterising the original atmospheric phase component and the residual one that remains after modelling the atmospheric contribution. This procedure can work with any type of deformation phenomena, provided that its spatial extension is sufficiently small. The quality of the obtained time series is illustrated discussing different deformation results, including a validation result using piezometric data and a thermal expansion case. View Full-Text
Keywords: SAR; Sentinel-1; differential SAR interferometry; atmospheric component; modelling; deformation time series; validation SAR; Sentinel-1; differential SAR interferometry; atmospheric component; modelling; deformation time series; validation
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Crosetto, M.; Devanthéry, N.; Monserrat, O.; Barra, A.; Cuevas-González, M.; Mróz, M.; Botey-Bassols, J.; Vázquez-Suñé, E.; Crippa, B. A Persistent Scatterer Interferometry Procedure Based on Stable Areas to Filter the Atmospheric Component. Remote Sens. 2018, 10, 1780.

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