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Optical Clocks Contribute to Steering International Atomic Time

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TOKYO, March 7, 2019 — Optical clocks, which have seen rapid progress in the last 20 years, have evaluated the “one second” tick of International Atomic Time (TAI). The resulting data was provided to the Bureau International des Poids et Mesures (BIPM), which used the data to adjust the TAI tick rate. To maintain the reliability of TAI, BIPM collects data from more than 400 atomic clocks operated around the world. The accuracy of the ticking rate has been maintained by the calibrations provided by frequency standards. While microwave standards have long been in charge of calibrations for adjusting...Read full article

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