ArticleDigitalEmerging TechEnergyProjectsTransportationTunnel Boring

High-frequency InSAR displacement monitoring and trend detection analysis

Remote sensing data, and particularly space-based interferometric synthetic aperture radar (InSAR), is being integrated into many monitoring programs for tunneling projects. Interferometry is a remote sensing technique employed to detect and track deformation of the ground’s surface over time (Gabriel et al., 1989; Massonnet and Feigl, 1998; Bamler and Hartl, 1998; Rosen et al., 2000). The technique provides regional-scale data on ground settlement with millimeter accuracy, which allow it to be analyzed alongside ground leveling and other conventional survey techniques. FIG. 1 An illustration showing the relationship between ground displacement and signal phase shift. This is the basic principle of InSAR for measuring ground movement. Early InSAR techniques were applied to study gro...

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