Sistema Interamericano de Metrologia (SIM) Time Network (5940517551)

There are 16 member countries in the Sistema Interamericano de Metrologia (SIM) Time Network that contribute to the continuous, near real-time comparisons of their respective time standards.
See also www.nist.gov/physlab/div847/sim_052510.cfm.
Credit: A. Novick, NIST
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