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SERG/EGGS Developments and innovation using InSAR

04 May 2021
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Event type:
Evening meeting, Virtual event, Specialist Group, Regional Group
Organised by:
Geological Society Events, Engineering Group, South East Regional Group
Virtual event
Event status:


Stewart Agar, Department of Civil and Environmental Engineering, Imperial College London

Stewart is a researcher in the Geotechnics Section at Imperial College, London and Director of Ground Evolution Monitoring Ltd (GEM). His main research interests are focused on developing new and existing software approaches, such as the ‘Persistent Scatterer’ and ‘Distributed Scatterer’ techniques, to optimise their performance in rural areas of the UK. These developments allow InSAR to be an effective tool for surveying rural areas - capable of identifying faults, vegetation types, groundwater driven movements and geohazards. Stewart applies these techniques to help predict and monitor ground engineering problems, and is further developing new tools which use the full amplitude, phase and polarimetric components of SAR data to measure variations in surface moisture.

Location and time

Online via Zoom at 18.00hrs BST

Event details

This event is being held jointly by the South Eastern Regional Group (SERG) and the Engineering Group (EGGS)

Interferometric Synthetic Aperture Radar (InSAR) is a family of remote sensing techniques used to measure ground surface deformation to millimetric precision. The wide and frequent coverage from SAR satellites, and the impressive accuracies of data processing techniques has led to a rapid increase in the value of InSAR over recent years. The performance and value of InSAR continue to grow as new generations of SAR satellites are launched and processing methods improve. This has led to a revolution in our ability to monitor ground movements and surface properties at various scales and time periods, enabling unprecedented insight for a range of infrastructure projects and geohazards. This presentation will introduce the principles of InSAR and highlight some of the innovative research and development currently ongoing at Imperial College, London through several geology related case studies both in the UK and


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