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Summary of Proposal GEO3224

TitlePrecise motion-tracking of persistent scatterers using high-resolution spotlight mode SAR data for infrastructure health monitoring
Investigator Lu, Zhong - Southern Methodist University, Earth Sciences
Team Member
Prof. Lu, Zhong - Southern Methodist University, Huffington Department of Earth Sciences
Mr. Navneet, Sankarambadi - Southern Methodist University, Huffington Department of Earth Sciences
SummaryQuality of human life depends on the structural integrity of the civil infrastructure. The sheer volume of urban infrastructure and geotechnical assets (bridges, levees, dams, embankments) makes current inspection techniques laborious and economically infeasible. Complimenting in-situ measurements with remote sensing tools would considerably impact on the capability of our state and Federal authorities for infrastructure health monitoring. Developing InSAR processing framework for measuring localized deformation using both amplitude and phase information of high resolution urban SAR imagery is necessary for efficient infrastructure monitoring. The presence of large number of linear structures in urban areas makes the use of combined persistent, distributed, and temporary scatterer InSAR algorithms particularly suited for monitoring the urban environment. The environment is characterized by multi-path microwave backscattering presenting unique challenges in high-precision InSAR procesing. In this study, we will improve scatterer localization and detection techniques, contributing specifically multi-baseline technique for layover mitigation and non-linear deformation modelling. There is a surfeit of data already available through TerraSAR/Tandem-X missions. However, a critical gap exists between availability of data and the tool required to process urban infrastructure datasets. We propose to develop infrastructure oriented InSAR processing framework to detect and measure the horizontal and vertical deformation for individual structures using archived TerraSAR-X images collected over the cities of Munich and Berlin. Our technique development will generate high-precision displacement measurements for forensic engineering and mitigating hazards associated with infrastructure collapse or large displacement.

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DLR 2004-2016