Due to increasing importance of monitoring geologically active regions, such as landslides, we established an Alpine Metrology Lab (AML) for investigating and further improving geomonitoring technologies. So far, we focus on using permanent GNSS and terrestrial laser scanning (TLS) for validating and enhanced interpretation of InSAR observations. Within this paper we present our initial results related to cross-validation of mass movements observed by permanent GNSS and long-range TLS. The AML is established in the Matter Valley (Switzerland) in a region contaning active landslides and rockglaciers. Our results indicate that long-range TLS is suitable for remote sensing of mass movements over wide areas if the displacements exceed 0.4 m; we detected this as the sensitivity limit of the implemented workflow. The installed permanent GNSS network provided the reference values of mass movement magnitudes with an uncertainty of about 2 to 4 mm, uncovering small systematic biases in the TLS data. This needs to be further investigated in order to use both measurement techniques for validation of InSAR measurements
