| slovo | definícia |
universal time
(encz) | universal time, n: |
universal time
(wn) | universal time
n 1: the local time at the 0 meridian passing through Greenwich,
England; it is the same everywhere [syn: {Greenwich Mean
Time}, Greenwich Time, GMT, universal time, UT,
UT1] |
universal time
(foldoc) | Universal Time
(UT) The mean solar time along the prime
meridian (0 longitude) that runs through the Greenwich
Observatory outside of London, UK, where the current system
originated. UT is tied to the rotation of the Earth in
respect to the fictitious "mean Sun".
Greenwich Mean Time (GMT) was measured from Greenwich mean
midday until 1925 when the reference point was changed from
noon to midnight and the name changed to "Universal Time".
There are three separate definitions, UT0, UT1, and UT2,
depending on which corrections have been applied to the
Earth's motion. Coordinated Universal Time is kept within
0.9 seconds of UT1, by addition of leap seconds to
International Atomic Time.
(2001-08-02)
|
| | podobné slovo | definícia |
coordinated universal time
(encz) | coordinated universal time, n: |
coordinated universal time
(wn) | coordinated universal time
n 1: Greenwich Mean Time updated with leap seconds [syn:
coordinated universal time, UTC] |
coordinated universal time
(foldoc) | Coordinated Universal Time
CUT
ITU-T X.680
leap second
UTC
World Time
Zulu time
(UTC, World Time) The standard time common to
every place in the world. UTC is derived from {International
Atomic Time} (TAI) by the addition of a whole number of "leap
seconds" to synchronise it with Universal Time 1 (UT1), thus
allowing for the eccentricity of the Earth's orbit, the
rotational axis tilt (23.5 degrees), but still showing the
Earth's irregular rotation, on which UT1 is based.
Coordinated Universal Time is expressed using a 24-hour clock
and uses the Gregorian calendar. It is used in aeroplane
and ship navigation, where it also sometimes known by the
military name, "Zulu time". "Zulu" in the phonetic alphabet
stands for "Z" which stands for longitude zero.
UTC was defined by the International Radio Consultative
Committee (CCIR), a predecessor of the ITU-T. CCIR
Recommendation 460-4, or ITU-T Recommendation X.680 (7/94),
contains the full definition.
The language-independent international abbreviation, UTC, is
neither English nor French. It means both "Coordinated
Universal Time" and "Temps Universel Coordonné".
{BIPM
(http://www.bipm.org/enus/5_Scientific/c_time/time_1.html)}.
{The Royal Observatory Greenwich
(http://rog.nmm.ac.uk/leaflets/time/time.html)}.
{History of UTC and GMT
(http://ecco.bsee.swin.edu.au/chronos/GMT-explained.html)}.
{U.S. National Institute of Standards & Technology
(http://its.bldrdoc.gov/fs-1037/dir-009/_1277.htm)}.
{UK National Physical Laboratory
(http://npl.co.uk/npl/ctm/time_scales.html)}.
{US Naval Observatory
(http://tycho.usno.navy.mil/systime.html)}.
{International Telecommunications Union
(http://itu.int/radioclub/rr/arts02.htm)}.
Earth's irregular rotation (/pub/misc/earth_rotation).
(2001-08-30)
|
universal time coordinated
(foldoc) | Universal Time Coordinated
An incorrect term for {Coordinated Universal
Time}.
(2001-08-01)
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