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WWV Time Standard

January 31st Fact-of-the-Day

In 1999 National Institute of Standards station WWV in Fort Collins, Colorado, began using a new atomic clock known as NIST F1. NIST F1 is a further refinement of pioneering atomic clock development work Norman Ramsey of Harvard University, Hans Dehmelt of the University of Washington, and Wolfgang Paul of the University of Bonn were awarded the Nobel Prize in Physics for in 1989. NIST F1 is one of the most accurate clocks ever constructed. It has a time uncertainty of about one second in 20 million years. Clocks with similar accuracies are being used as primary time standards in Germany and France. ©2005 Martek International All rights reserved.


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