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New Atomic Fountain Clock Joins Elite Group That Keeps the World on Time
Wednesday April 30, 2025. 10:01 PM , from Slashdot
![]() NIST-F4 measures an unchanging frequency in the heart of cesium atoms, the internationally agreed-upon basis for defining the second since 1967. The clock is based on a 'fountain' design that represents the gold standard of accuracy in timekeeping. NIST-F4 ticks at such a steady rate that if it had started running 100 million years ago, when dinosaurs roamed, it would be off by less than a second today. By joining a small group of similarly elite time pieces run by just 10 countries around the world, NIST-F4 makes the foundation of global time more stable and secure. At the same time, it is helping to steer the clocks NIST uses to keep official U.S. time. Distributed via radio and the internet, official U.S. time is critical for telecommunications and transportation systems, financial trading platforms, data center operations and more. Read more of this story at Slashdot.
https://science.slashdot.org/story/25/04/30/201234/new-atomic-fountain-clock-joins-elite-group-that-...
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