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A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.
Arch Linux (/ ɑːr tʃ /) [7] [8] [g] is an open source, rolling release Linux distribution. Arch Linux is kept up-to-date by regularly updating the individual pieces of software that it comprises. [9] Arch Linux is intentionally minimal, and is meant to be configured by the user during installation so they may add only what they require. [10]
The development of atomic clocks has led to many scientific and technological advances such as precise global and regional navigation satellite systems, and applications in the Internet, which depend critically on frequency and time standards. Atomic clocks are installed at sites of time signal radio transmitters. [113]
Even the Earth's rotation rate has more drift and variation in drift than an atomic clock due to tidal acceleration and other effects. The principle behind the atomic clock has enabled scientists to re-define the SI unit second in terms of exactly 9 192 631 770 oscillations of the caesium-133 atom. The precision of these oscillations allows ...
Clock network – Set of clocks that synchronized to same time; International Atomic Time – Time standard based on atomic clocks; IRIG timecode – Standard formats for transferring time information; NITZ – Mechanism for time synchronisation on mobile devices; NTP pool – Networked computers providing time synchronization
Download as PDF; Printable version; In other projects ... 18 cesium atomic clocks and 4 hydrogen maser clocks ... National Standard Time and Frequency Laboratory;
The master atomic clock ensemble at the U.S. Naval Observatory in Washington D.C., which provides the time standard for the U.S. Department of Defense. [1] The rack mounted units in the background are caesium beam clocks. The black units in the foreground are hydrogen maser standards.
The first caesium clock was built by Louis Essen in 1955 at the National Physical Laboratory in the UK [1] and promoted worldwide by Gernot M. R. Winkler of the United States Naval Observatory. Caesium atomic clocks are one of the most accurate time and frequency standards, and serve as the primary standard for the definition of the second in ...