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coordinated universal time
Sinônimos
universal time
universal time coordinated
Definição1
The basis for civil timekeeping. It is formally defined by a mathematical formula which relates UT to Greenwich mean sidereal time. Depending on the context, universal time and UT are commonly used to mean 1) UT0, which is dependent on the observer's location; 2) UT1, which removes the effect of the motion of the geographic pole; or 3) coordinated universal time (UTC). Since 1 January 1972, weather services have used UTC as the standard of time.
Fonte1
AMERICAN METEOROLOGICAL SOCIETY. Glossary of meteorology. [S.l., última modificação 05 oct. 2015]. Disponível em: < http://glossary.ametsoc.org/wiki/Main_Page >. Acesso em: 27 jul. 2022.
Fonte2
INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 5 to the Convention on International Civil Aviation: unites of measurement to be used in air and ground operations. 5th ed. Montreal, 2010. (Annex 5).
Nota adicional1
Acronyms in English: UTC, UT.
Nota adicional2
Also referred to as Z or GMT.
Contexto
Coordinated Universal Time (UTC) has now replaced Greenwich Mean Time (GMT) as the accepted international standard for clock time.
Related Term
Greenwich mean time
Português
tempo universal coordenado