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NIST physicists Steve Jefferts (foreground) and Tom Heavner with the NIST-F2 cesium fountain atomic clock, a civilian time standard for the United States. NIST-F2 is a caesium fountain atomic clock that, along with NIST-F1, serves as the United States' primary time and frequency standard. [1] NIST-F2 was brought online on 3 April 2014. [1] [2]
In a time period from 1959 to 1998, NIST developed a series of seven caesium-133 microwave clocks named NBS-1 to NBS-6 and NIST-7 after the agency changed its name from the National Bureau of Standards to the National Institute of Standards and Technology. [10] The first clock had an accuracy of 10 −11, and the last clock had an accuracy of ...
NIST-7 was the atomic clock used by the United States from 1993 to 1999. It was one of a series of Atomic Clocks [ 1 ] at the National Institute of Standards and Technology . Eventually, it achieved an uncertainty of 5 × 10 −15 .
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. move to sidebar hide ... Deep Space Atomic Clock [30]
NIST-F1 is a cesium fountain clock, a type of atomic clock, in the National Institute of Standards and Technology (NIST) in Boulder, Colorado, and serves as the United States' primary time and frequency standard. The clock took fewer than four years to test and build, and was developed by Steve Jefferts and Dawn Meekhof of the Time and ...
Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.
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