Measurements and Error Sources in Time Transfer Using Asynchronous Fiber Network
Journal article, 2010

We have performed time transfer experiments based on passive listening in fiber optical networks using Packet over synchronous optical networking (SONET)/synchronous digital hierarchy(SDH). The experiments have been performed with different complexity and over different distances. For assessment of the results, we have used a GPS link based on carrier-phase observations. On a 560-km link, precision that is relative to the GPS link of < 1 ns has been obtained over several months. In this paper, we describe and quantify the different error sources influencing the fiber time transfer measurements. We show that the temperature dependence of the optical fiber is the major contribution to the error budget, and, thus, reducing this effect should be the best way of improving the results.

Time transfer

Fiber link

GPS carrier phase

Synchronous optical networking (SONET)/synchronous digital hierarchy (SDH)


Fiber network


Sven-Christian Ebenhag

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Per Olof E Hedekvist

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Per O. J. Jarlemark

SP Sveriges Tekniska Forskningsinstitut AB

Ragne Emardson

SP Sveriges Tekniska Forskningsinstitut AB

R. T. Kenneth Jaldehag

SP Sveriges Tekniska Forskningsinstitut AB

Carsten Rieck

Chalmers, Department of Radio and Space Science, Space Geodesy and Geodynamics

Peter Löthberg


IEEE Transactions on Instrumentation and Measurement

0018-9456 (ISSN)

Vol. 59 7 1918-1924

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



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