Extended Data Fig. 1: Map of the TNPS testbed.
From: A hybrid optical–wireless network for decimetre-level terrestrial positioning
Locations of data centres at Delft University of Technology (TU D) and schematic representation of the fibre-optic connections are shown. The reference atomic clocks that are used to realize UTC(VSL) and synchronize the WR network are located at VSL. Map data copyright OpenStreetMap (https://www.openstreetmap.org/copyright), obtained under Open Database License 1.0.
