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February 28, 2014 AT 7:11 am

Where Time Comes From

Adafruit 2668

Where Time Comes From.

The time that ends up on your smartphone—and that synchronizes GPS, military operations, financial transactions, and internet communications—originates in a set of atomic clocks on the grounds of the U.S. Naval Observatory. Dr. Demetrios Matsakis, Chief Scientist for USNO’s Time Services, gives a tour.


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