GPS; Internet (5941021732)
The Sistema Interamericano de Metrologia (SIM) time and frequency network spans a large geographical area, connecting Canada, the United States, Mexico, Panama, and Brazil. The baseline from the National Institute of Standards and Technology to the Brazilian national metrology institute is 9500 km.
See also www.nist.gov/public_affairs/techbeat/tb2007_0119.htm#time
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