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Each row of dots represents an atomic clock, for example, NIST-F2 clock has a row of dots. The dots symbolize times and dates when the clock accuracy was evaluated for establishing
International Atomic Time (TAI). The clocks with bigger rows of dots have been evaluated within a month of contributing
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by the
International Bureau of Weights and Measures (BIPM) and are part of the Circular T '3 - Duration of the TAI scale interval d.' paragraph.
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This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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If the file has been modified from its original state, some details may not fully reflect the modified file.
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Red<->Caesium Beam Green<->Caesium
Fountain Gold<->Rubidium Fountain Optical<->Blue
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The following pages on the
English Knowledge (XXG) use this file (pages on other projects are not listed):
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Annual Report on Time
Activities 2020:International Atomic Time (TAI) and Coordinated Universal Time (UTC)
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Data points representing atomic clocks around the world that define
International Atomic Time (TAI)
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Uploaded a work by BIPM from https://www.bipm.org/en/-/2021-12-21-record-tai with UploadWizard
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Click on a date/time to view the file as it appeared at that time.
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Different colors symbolize different types of atomic clocks:
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reports of various primary frequency and time standards are
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to the TAI accuracy clock ensemble. The accuracy evaluation
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https://creativecommons.org/licenses/by/3.0/igo/deed.en
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Creative
Commons Attribution-ShareAlike 3.0 Unported
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654:Atomic clock
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525:File history
351:atomic clock
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114:You can help
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22:File history
404:copyrighted
255:attribution
136:Description
645:File usage
626:605 × 323
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542:Dimensions
494:media type
27:File usage
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536:Date/Time
509:image/png
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203:Licensing
145:English:
80:image/png
684:37.8 dpc
676:37.8 dpc
660:Metadata
628:(108 KB)
311:Captions
244:to remix
238:to share
229:license.
32:Metadata
598:(51 KB)
568:(54 KB)
553:current
548:Comment
335:depicts
315:English
128:Summary
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192:Author
182:Source
545:User
276:true
273:true
195:BIPM
172:Date
17:File
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293:↑
159:B
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
