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What is the difference between Tai and UTC?
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Feb 3, 2010 · Coordinated Universal Time (UTC) is based on TAI, but it is adjusted by leap seconds to account for the difference between the definition of the second and the rotation of Earth. This correction keeps UTC in conjunction with the apparent position of the Sun and the stars, and it is the standard used for all general timekeeping applications.
The offset indicates how many hours and minutes the local time is ahead (+) or behind (-) UTC. For example, UTC+1 means the local time is one hour ahead of UTC, while UTC-1 means the local time is one hour behind UTC. The UTC offset is the difference in hours and minutes between UTC and the time at a particular place.
In specialized domains such as scientific research, navigation, and timekeeping, other standards such as UT1 and International Atomic Time (TAI) are also used alongside UTC. UTC is based on TAI, which is a weighted average of hundreds of atomic clocks worldwide.
On the other hand, TAI does not take into account the variations in Earth's rotation speed, which determines the true length of a day. For this reason, UTC is constantly compared to UT1. Before the difference between the two scales reaches 0.9 seconds, a leap second is added to UTC.
May 9, 2024 · reply. dexwiz 3 days ago | parent | next [–] Another way to think about it is that UTC is a combination of UT1 and TAI. It’s kept within 1 second of UT1 and is always a fixed integer offset from TAI. TAI is an absolute time based on atomic vibrations. UT1 is a relative time based on astrometric systems. reply.
Knowledge Base. live TAI - UTC comparison. A live clock shows the difference between UTC and TAI, which changes from 34 seconds to 35 seconds during the leap second on 2012-Jun-30. PTP time is the same as TAI. Test Service: IEEE 1588 Testing Services. Link: http://www.leapsecond.com/java/gpsclock.htm. Category: External Links.
UTC is itself derived from International Atomic Time (TAI) from which it differs only by a whole number of seconds, currently 32.
