Landslide monitoring by using ground-based SAR interferometry: an example of application to the Tessina landslide in Italy

An innovative technique, based on radar interferometry and implemented using ground-based instrumentation, has been applied for monitoring the Tessina landslide (Italy, Belluno). The technique has allowed us to derive multi-temporal surface deformation maps of the entire depletion zone of the landslide with a high resolution and accuracy. The portable device used in this application is known as LISA (Linear SAR) and it is able to provide measurements at 17 GHz with a synthetic aperture of up to 2.8 m. The results have been validated by comparing the recorded pixel displacements with independent measurements carried out by a motorized theodolite and EDM (Electronic Distance Meter) on two benchmarks.