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The ground-based interferometric synthetic aperture radar (GB-InSAR) is a mobile RADAR system for the multi-temporal detection, monitoring and analysis of displacement rates. The ground-based radar interferometry allows for the high-resolution spatiotemporal sensing and deformation monitoring of landslides and critical infrastructure. While enabling a near real-time continuous data acquisition frequency, with an acquisition range up to 4 kilometres, while maintaining a sub-millimetre measurement precision. Furthermore, the LisaMobil GB-InSAR system has a high degree of operative flexibility, in terms of I) observation frequency; II) acquisition geometry; III) polarisation; IV) acquisition frequency; V) and easiness of installation even in a very short time. Moreover, GB-InSAR systems can operate in steep slopes when satellites-based InSAR techniques are not applicable. Therefore, GB-InSAR provides a source of high-resolution spatiotemporal data for monitoring and early warning purposes.
Univ.Prof. Mag.rer.nat. Dr.sc.nat. Christian Zangerl
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Methods & Expertise for Research Infrastructure
The ground based interferometric synthetic aperture radar allows for a high-resolution and near real-time continuous monitoring (every 5 minutes, 24 hours per day, 365 days per year) of displacement rates. It may operate also at a long range, with an average operative distance of about 2 km and a maximal distance of about 4 km without limitations due to lighting or atmospheric conditions (e.g. rain, clouds).
The application field of GB-InSAR are therefore diverse and includes the I) sensing and monitoring of displacements in landslides, slopes and excavation pit; II) sensing and monitoring displacements in structures, buildings, bridges, dams and historical monuments; III) sensing and monitoring displacements of glaciers and rock glaciers; IV) monitoring of natural hazard and may act as an early warning system.