Local mean time

Local mean time

Local mean time is a form of solar time that corrects the variations of local apparent time, forming a uniform time scale at a specific longitude. Its uniformity depends only on the accuracy of the clocks used to measure it.

Local mean time was used from the early nineteenth century, when local solar time or sundial time was last used, until standard time was adopted on various dates in the several countries. Standard time means that the same time is used throughout some region — usually, it was either offset from Greenwich Mean Time or was the local mean time of the capital of the region. The difference between local mean time and local apparent time is the equation of time.

ee also

* Day
* Time zone


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • local mean time — local mean time, = local time. (Cf. ↑local time) …   Useful english dictionary

  • local mean time — vietinis vidutinis laikas statusas T sritis Gynyba apibrėžtis Laikas, kurio atskaitai naudojamas vietinis dienovidinis, o ne standartinės laiko juostos ar Grinvičo dienovidinis. atitikmenys: angl. local mean time pranc. temps local moyen …   NATO terminų aiškinamasis žodynas

  • local mean time — The equatorial are between the observer’s antimeridian and the meridian of the mean sun measured westward and expressed in time, where 15.04° = 1 h (i.e., the time interval that has elapsed since the mean sun’s transit of the observer’s… …   Aviation dictionary

  • local mean time — The time interval elapsed since the mean sun …   Military dictionary

  • Mean time — Time Time, n.; pl. {Times}. [OE. time, AS. t[=i]ma, akin to t[=i]d time, and to Icel. t[=i]mi, Dan. time an hour, Sw. timme. [root]58. See {Tide}, n.] 1. Duration, considered independently of any system of measurement or any employment of terms… …   The Collaborative International Dictionary of English

  • Greenwich Mean Time — (GMT) is a term originally referring to mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, although strictly UTC is an atomic time… …   Wikipedia

  • Washington mean time — was the time at the meridian through the center of the old dome atop the main building at the old US Naval Observatory at Washington, D.C. This Washington meridian was defined on 28 September 1850 by the United States Congress (9 Stat. 515). The… …   Wikipedia

  • mean time — /ˈmin taɪm / (say meen tuym) noun the time at a given place on earth based on a day of 24 hours; the interval between successive local noons on which local time is based varies and so an average day of 24 hours is used, giving mean time. Also,… …  

  • Greenwich Mean Time — ➡ GMT. * * *       the name for mean solar time of the longitude (0°) of the Royal Greenwich Observatory in England. The meridian at this longitude is called the prime meridian or Greenwich meridian.       Greenwich Mean Time was used for clearly …   Universalium

  • Greenwich Mean Time — Temps moyen de Greenwich « GMT » redirige ici. Pour les autres significations, voir GMT (homonymie) …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”