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Summary

Description
English: Different colors symbolize different types of atomic clocks:

Red<->Caesium Beam Green<->Caesium Fountain Gold<->Rubidium Fountain Optical<->Blue

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 to the TAI accuracy clock ensemble. The accuracy evaluation uB reports of various primary frequency and time standards are published online 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.[1]
Date
Source https://www.bipm.org/en/-/2021-12-21-record-tai
Author BIPM

Licensing

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 3.0 IGO license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  1. Annual Report on Time Activities 2020:International Atomic Time (TAI) and Coordinated Universal Time (UTC)

Captions

Data points representing atomic clocks around the world that define International Atomic Time (TAI)

21 December 2021

image/png

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Date/TimeThumbnailDimensionsUserComment
current11:46, 13 January 2024Thumbnail for version as of 11:46, 13 January 20241,920 × 1,024 (54 KB)Francis Flinchnewer version
09:57, 21 February 2022Thumbnail for version as of 09:57, 21 February 20221,920 × 1,024 (51 KB)Francis FlinchHD version
01:39, 18 February 2022Thumbnail for version as of 01:39, 18 February 2022605 × 323 (108 KB)WalkingRadianceUploaded a work by BIPM from https://www.bipm.org/en/-/2021-12-21-record-tai with UploadWizard

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