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  Satellite radar data to monitor tunneling-related surface displacements in sensitive urban areas

  Satellite radar data have been used in recent decades to monitor ground displacements, thanks to a technique known as advanced satellite InSAR. The latest development of this technique is SqueeSAR™, which allows the identification of ground points and their displacement in time with millimetric accuracy. Analysis of ground displacement is possible due to the exploitation of data obtained from all radar systems: the distance between the sensor and an ‘illuminated’ target. SqueeSAR™ has been already applied in several projects related to underground tunneling. Satellite data are complementary to in-situ measurements and does not require the installation of any ground instrumentation. Selected new case studies have been presented, focusing on recent metro lines projects located in sensitive urban areas (Rome, Milan, Vancouver).

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