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On calibration of network time services

Vladimir Smotlacha1, Jan Čermák2 and Juan Palacio3

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This paper proposes methods for calibration of two network time services—NTP servers and time-stamp authorities. The calibration is described in conformity with metrological principles like other time distribution systems. The authors have built up the calibration sets and tested them in cooperation with five European time and frequency laboratories. The paper also presents and discusses experimental results collected by measurement of time servers between involved laboratories.


PACS

06.20.fb Standards and calibration

07.05.-t Computers in experimental physics

06.30.Ft Time and frequency

Subjects

Instrumentation and measurement

Dates

Issue 6 (December 2008)

Received 16 July 2008

Published 5 December 2008



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