Monitoring is essential for assessing the stability of natural rocks and rock structures, confirming the validity of the design, predicting risks, managing safe operations, and reducing project costs. The monitoring system used in Rock and Geotechnical Engineering is ideally required to be able to monitor the behavior of rocks and soils in local to extensive areas, continuously and automatically, with high accuracy and at a low cost. Satellite technology (GPS/GNSS and SAR) will support the realization of such monitoring. This paper firstly outlines GPS/GNSS and SAR as tools for displacement monitoring and then describes the concept of “spatio-temporal continuous displacement monitoring” in Rock and Geotechnical Engineering. A practical application is demonstrated by means of the combination of GPS/GNSS and SAR for monitoring a slope. Then, case studies of monitoring land subsidence due to the extraction of brine from an underground salt mine and landslides in an extensive valley and along a coast, conducted as international collaborative research, are introduced.

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