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Establishment of the SIM Time Scale



Michael A. Lombardi, Nelida Diaz-Munoz, J. Mauricio Lopez-Romero


The SIM time and frequency metrology working group has developed a comparison network for the Americas, with the goals of improving metrology in the SIM region by allowing as many countries as possible to participate in the network. As of May 2008, 10 National Metrology Institutes (NMI s) were participating. By the end of 2009, 16 SIM NMI s are expected to be participating. This paper describes how measurements from the SIM network will be used to generate a time scale named SIM-time to be used as time reference for the SIM region.
Proceedings Title
Proc. 2008 CENAM Symposium of Metrology
Conference Dates
October 22-24, 2008
Conference Location
Queretaro, MX


cesium, ydrogen maser, international comparisons, time scale, time scale algorithm


Lombardi, M. , Diaz-Munoz, N. and , J. (2008), Establishment of the SIM Time Scale, Proc. 2008 CENAM Symposium of Metrology, Queretaro, MX, [online], (Accessed May 26, 2024)


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Created October 22, 2008, Updated February 19, 2017