Optical fiber time and frequency transfer inside urban telecom network in Warsaw - Results of initial tests

In this paper, the initial results of optical fiber time and frequency transfer at the optical distance up to about 40 km inside urban telecom network have been presented. The applied optical methods have been shortly described. The results of optical measurements have been compared with GPS CV method and specifications of compared clocks. In practice, it was obtained a similar effect if compared clocks were standing very close to each other.