coordinated universal time


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co·or·di·nat·ed universal time

(kō-ôr′dn-ā′tĭd)
n. Abbr. UTC
An international time standard calculated by atomic clock and incorporating occasional leap seconds to compensate for changes in the rotation of the earth. Coordinated universal time serves as the basis for standard time around the world.

coor′dinated univer′sal time`


n.
(usu. caps.) standard time equivalent to Greenwich Time but corrected by atomic clocks to match the earth's rotation.

Coordinated Universal Time

An atomic time scale that is the basis for broadcast time signals. Coordinated Universal Time (UTC) differs from International Atomic Time by an integral number of seconds; it is maintained within 0.9 seconds of UT1 (see Universal Time) by introduction of Leap Seconds. The rotational orientation of the Earth, specified by UT1, may be obtained to an accuracy of a tenth of a second by applying the UTC to the increment DUT1 (where DUT1 = UT1 - UTC) that is broadcast in code with the time signals. Also called UTC. See also International Atomic Time; Universal Time; ZULU Time.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.coordinated universal time - Greenwich Mean Time updated with leap seconds
GMT, Greenwich Mean Time, Greenwich Time, universal time, UT, UT1 - the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
Earth-received time, ERT - the coordinated universal time when an event is received on Earth
transmission time, TRM - the coordinated universal time when a transmission is sent from Earth to a spacecraft or other celestial body
SCET, spacecraft event time - the coordinated universal time on board the spacecraft; "SCET = TRM + OWLT"
References in periodicals archive ?
Leap seconds are added periodically to adjust to irregularities in the earth s rotation in relation to Coordinated Universal Time (UTC), the current reference for measuring time, in order to remain close to mean solar time (UT1).
More than 400 atomic clocks in 70 institutes form the international time scale, called Coordinated Universal Time or UTC.
Our latest move to add leap second to the UAE standard time follows a decision by the International Earth Rotation and Reference Systems Service (based at the Paris Observatory) in January 2015 to add a leap second to Coordinated Universal Time (UTC) at the end of June this year.
Certified Time is a proprietary and audited time delivery service that relies on Coordinated Universal Time (UTC), the official timescale of the National Institute of Standards and Technology (NIST).
This year's vernal equinox occurs on March 20, at exactly 11:02 Coordinated Universal Time (UTC), or 7:02 am Eastern Daylight Time, ushering in spring in the Northern Hemisphere, and autumn for the Southern.
At 10:25 Coordinated Universal Time (UTC) on July 16 (top image), the iceberg was still close to the glacier.
JUNE 30 -- A leap second is added to Coordinated Universal Time (UTC).
Today's system is called Coordinated Universal Time (UTC).
They discuss time before the 20th century, solar time, ephemerides, variable earth time, earth rotation and polar motion, ephemeris time, relativity and time, dynamical and coordinate time scales, clock developments, microwave atomic clocks, optical atomic standards, the definition and role of a second, international atomic time, coordinated universal time, time in the solar system, time and frequency transfer, modern earth orientation, international activities, time applications, and the future of timekeeping.
2degrees West (North America) Coordinated Universal Time UTC 12:25 - 12:50 p.

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