Permanent GNSS networks
Permanent GNSS stations form the modern-day reference points for positioning and surveying. GNSS receivers located at several thousand stations throughout the world permanently receive signals from the available navigation satellites. The networks are divided into various categories according to their importance.

Federal Office of Topography swisstopo
Division Survey
Seftigenstrasse 264
3084 Wabern
Seftigenstrasse 264
3084 Wabern