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World Clock - Worldwide
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TAI (International Atomic Time)
The International Atomic Time ( "TAI") is one of the major constituents of Coordinated Universal Time ("UTC"), the time series used to measure global time. telling us what speeds to set our watches ticking. The Coordinated Universal Time (UTC) is determined using two components: The International Atomic Time ( TAI ) is a time dial that uses the combination of about 400 high-precision nuclear timepieces.
lt delivers exactly the rate at which our watches are ticking. The Universal Time (UT1), also known as astronomic time, relates to the Earth's orbit. The international nuclear time is an extremely accurate means of time measuring. Nuclear watches differ by only 1 second in up to 100 million years. One of the secrets of this flawless accuracy is the correct measuring of the second as the basic element of timekeeping.
In the International System of Units (SI), one second is defined as the time it took a caesium-133 basic state atom to vibrate exactly 9,192,631,770 vibrations. Nuclear watches are supposed to record this frequence, most of them today with the help of nuclear wells, an atmosphere of clouds of atoms thrown upwards by laser beams in the Earth's gravity area.
lf you could see a nuclear well, it would look like a borehole of fire. So if TAI is so accurate, why use leak seconds? In order to reach the highest degree of precision, the International Bureau of Weights and Measures is combining the performance of about 400 nuclear watches in 69 domestic labs around the world to measure the TAI.
Timescale is weighed and prioritizes the time signals of those organizations that guarantee the highest possible grade of caesium. A high degree of accuracy that can be reached through the use of nuclear watches is both a boon and a bane. Which is the default time?