Imperial College London
Portrait Picture

Dr James Lawrence

Faculty of Engineering, Department of Civil and Environmental Engineering

Reader in Geological Engineering
 
 
 
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Contact

 

+44 (0)20 7594 0700j.lawrence Website

 
 
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Assistant

 

Ms Sue Feller +44 (0)20 7594 6077

 
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Location

 

528ASkempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Scoular:2022:10.1144/qjegh2022-049,
author = {Scoular, J and Ghail, R and Mason, P and Lawrence, J},
doi = {10.1144/qjegh2022-049},
journal = {Quarterly Journal of Engineering Geology and Hydrogeology},
pages = {1--10},
title = {Are measured InSAR displacements a function of the chosen processing method?},
url = {http://dx.doi.org/10.1144/qjegh2022-049},
volume = {55},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The benefits of InSAR to the civil engineering industry have been demonstrated on many occasions, however there is still a limited uptake by end-users, due to perceived differences between data providers and uncertainty around how to interpret results. This paper critically compares three datasets for London: Radarsat-2 (RS2) from 2011 to 2015, TerraSAR-X (TSX) from 2011 to 2017, and Sentinel-1 (STL1) from 2015 to 2017. Two of the datasets (TSX & RS2) were processed by commercial data providers, while the STL1 data were processed using ENVI® SARscape® by the authors. The results show an inverse relationship between the Pearson Correlation Coefficient and absolute total displacement of Persistent Scatterers (PS). There is a strong correlation between datasets for total displacement greater than 5mm, but a weak or no correlation in the 0–3mm range. Consequently, standard commercial InSAR datasets, processed with no a priori knowledge of the area of interest, have error margins below 3–5mm but correctly detect all deformation phenomena exceeding this threshold. RS2-TSX both capture the spatial extent of the investigated area of dewatering induced subsidence, however STL1 measures a much broader, less pronounced zone of heave than TSX.
AU  - Scoular,J
AU  - Ghail,R
AU  - Mason,P
AU  - Lawrence,J
DO  - 10.1144/qjegh2022-049
EP  - 10
PY  - 2022///
SN  - 1470-9236
SP  - 1
TI  - Are measured InSAR displacements a function of the chosen processing method?
T2  - Quarterly Journal of Engineering Geology and Hydrogeology
UR  - http://dx.doi.org/10.1144/qjegh2022-049
UR  - https://www.lyellcollection.org/doi/10.1144/qjegh2022-049
UR  - http://hdl.handle.net/10044/1/98573
VL  - 55
ER  -
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