GNSS (Global Navigation Satellite Systems) is a global positioning and navigation system that uses satellite signals to provide precise location information worldwide. GNSS includes, for example, the US GPS, the Russian GLONASS and the European Galileo.

The first commercial TEDAMOS GNSS stations went into operation in 2015. There are currently over 70 TEDAMOS GNSS systems in use throughout Switzerland.

The raw data is transmitted from the sensors to the TEDAMOS servers every hour, where the analyses are carried out fully automatically using the Bernese GNSS software.


Static GNSS measurements enable continuous, high-precision observation of 3D deformations of geological structures or infrastructure such as ropeways, buildings, bridges, dams, etc.

The measurement method enables a better understanding of natural hazards by calculating and visualising 3D coordinates in an evaluation rhythm of, for example, 4 hours or 24 hours. This automates warning systems whose limit values are based either on absolute displacements or on daily or weekly velocities derived from them.


Advantages of this Technology

  • Highly precise 3D coordinates
  • Continuous measurement over long periods without loss of accuracy
  • Measurable year-round, independent of ground cover (snow/vegetation)
  • Weather-independent, measures even in fog or rain/snow
  • Does not require line of sight between measurement points
  • Easy installation of the all-in-one solution
  • Pillar: small footprint of only 20 cm

The TEDAMOS GNSS systems were specifically designed for harsh climatic conditions in high mountains. The all-round solar panels on the pillar version generate enough energy to enable measurements even on shaded slopes in winter.


Using the differential GNSS evaluation method, accuracies in the low mm range are achieved, depending on the distance to the reference station.

Depending on the required accuracies and the locations of the GNSS stations, we use our own GNSS reference stations installed in stable locations, or we utilize the AGNES stations provided by swisstopo as reference stations. 

Materialisation Options

Pillar long/short

Pillar short

Pillar light


Wall Mounting


Reference projects TEDAMOS GNSS


Long-term monitoring Riedberg Tunnel

Bundeamt für Strassen ASTRA, 2022 - 2031
Gampel, Switzerland

Automatic and manual tunnel and terrain monitoring measurements

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Zermatt Bergbahnen

Ropeways Monitoring Zermatt

Zermatt Bergbahnen AG, 2018 - ...
Zermatt, Switzerland

Permanent ropeways pillar monitoring

Learn more
Bergsturzgebiet Brienz-Brinzauls

Landslide Area Brienz-Brinzauls

Kanton Graubünden, Amt für Wald und Naturgefahren, 2019 - ...
Brienz (GR), Switzerland

Permanent monitoring of an active landslide area with various sensors

Learn more