Hybrid InSARTrac for Remote Geostructure Monitoring
Publication: Geo-Congress 2022
ABSTRACT
With terrestrial interferometric synthetic aperture radar (InSAR), geostructures can be monitored in real time with an unparalleled combination of accuracy and spatial resolution. However, the displacements obtained with InSAR are 1D in the line-of-sight direction, and thus offer limited insight concerning the causative deformation mechanism. This study summarizes a novel approach for obtaining 3D displacement vectors by combining measurements from InSAR and 2D Feature Tracking. The method is referred to as InSARTrac. Controlled laboratory tests indicate a 3D accuracy of 0.05 mm at a range of 13 m. Initial field tests conducted for this study, involving known displacements of a radar corner reflector, show a 3D accuracy of 0.5 mm at a range of 150 m, which is comparable to the accuracy obtained with the reference total station measurements.
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Geo-Congress 2022
Pages: 112 - 118
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Published online: Mar 17, 2022
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