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Mexico City land subsidence in 2014-2015 with Sentinel-1 IW TOPS: results using the Intermittent SBAS (ISBAS) technique

Sowter, Andrew; Amat, Moh. Che; Cigna, Francesca; Marsh, Stuart; Athab, Ahmed; Alshammari, Lubna

Authors

Andrew Sowter

Moh. Che Amat

Francesca Cigna

STUART MARSH Stuart.Marsh@nottingham.ac.uk
Professor of Geospatial Engineering

Ahmed Athab

Lubna Alshammari



Abstract

Differential Interferometric Synthetic Aperture Radar (DInSAR) can be considered as an efficient and cost effective technique for monitoring land subsidence due to its large spatial coverage and high accuracy provided. The recent commissioning of the first Sentinel-1 satellite offers improved support to operational surveys using DInSAR due to regular observations from a wide-area product. In this paper we show the results of an intermittent small-baseline subset (ISBAS) time-series analysis of 18 Interferometric Wide swath (IW) products of a 39,000 km2 area of Mexico acquired between 3 October 2014 and 7 May 2015 using the Terrain Observation with Progressive Scans in azimuth (TOPS) imaging mode. The ISBAS processing was based upon the analysis of 143 small-baseline differential interferograms. After the debursting, merging and deramping steps necessary to process Sentinel-1 IW roducts, the method followed a standard approach to the DInSAR analysis. The Sentinel-1 ISBAS results confirm the magnitude and extent of the deformation that was observed in Mexico City, Chalco, Ciudad Nezahualcóyotl and Iztapalapa by other C-band and L-band DInSAR studies during the 1990s and 2000s. Subsidence velocities from the Sentinel-1 analysis are, in places, in excess of -24 cm/year along the satellite line-of-sight, equivalent to over ~-40 cm/year vertical rates. This paper demonstrates the potential of Sentinel-1 IW TOPS imagery to support wide-area DInSAR surveys over what is a very large and diverse area in terms of land cover and topography.

Citation

Sowter, A., Amat, M. C., Cigna, F., Marsh, S., Athab, A., & Alshammari, L. (2016). Mexico City land subsidence in 2014-2015 with Sentinel-1 IW TOPS: results using the Intermittent SBAS (ISBAS) technique. International Journal of Applied Earth Observation and Geoinformation, 52, https://doi.org/10.1016/j.jag.2016.06.015

Journal Article Type Article
Acceptance Date Jun 13, 2016
Online Publication Date Jul 1, 2016
Publication Date Oct 1, 2016
Deposit Date Jun 16, 2016
Publicly Available Date Jul 1, 2016
Journal International Journal of Applied Earth Observation and Geoinformation
Print ISSN 0303-2434
Electronic ISSN 0303-2434
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 52
DOI https://doi.org/10.1016/j.jag.2016.06.015
Keywords SAR, InSAR, Sentinel-1, land subsidence, TOPS
Public URL http://eprints.nottingham.ac.uk/id/eprint/34142
Publisher URL http://www.sciencedirect.com/science/article/pii/S0303243416300976
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0



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