The structure of the TAPAS Platform

By using an earth-based system of reference stations (with a very accurate positioning), it is possible to calculate and correct the error from disturbances of the GNSS-signals from satellites. You can thereby achieve accurate positioning to within a few centimetres. TAPAS consists of 11 reference stations installed in buildings around Aarhus city and harbour with a distance between them of between 5-10 km.

TAPAS’ reference stations are each equipped with a geodetic GNSS receiver and antenna. The reference stations send their information via a cloud solution to a central server that calculates corrections, which the user can collect from the internet. The applied software is Geo++ GN Smart 2, which offers maximum flexibility for development of the calculation and transmission method. TAPAS correction data is sent via open standards in a RTCM format.

The short distance between TAPAS’ reference stations means that extremely precise corrections can be transmitted within a dense built up environment; something which would normally prove challenging due to difficulties receiving GNSS signals. It is expected that, in time, TAPAS will be able to provide a real-time accuracy of 1 cm3. This high level of accuracy will be able to be achieved within TAPAS’ coverage area.

Unique testing platform in a real-life scenario

With TAPAS, companies and other users can develop, try, test and document new products in a real city environment and not just in a laboratory. The platform was also designed as a basis for research and development projects that are financed by grants and seed money. The EU and ESA are increasingly calling for test options in real-life scenarios within their tenders.

There are many applications for this technology; some of which are within the field of autonomously controlled units where high accuracy is a key element. These units include self-driving cars, ships and drones, robots as well as place-based applications for various digital platforms. It is also expected that TAPAS will be able to link up with other technologies, such as LTE/5G, LoRaWan, etc.
26 JULY 2021