Time metrology

Time metrology or time and frequency metrology is the application of metrology for time keeping, including frequency stability.<ref name="Arias pp. 2289–2305">Arias, Elisa Felicitas (2005-07-02). "The metrology of time". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. The Royal Society. 363 (1834): 2289–2305. Bibcode:2005RSPTA.363.2289A. doi:10.1098/rsta.2005.1633. ISSN 1364-503X. PMID 16147510. S2CID 20446647.</ref><ref name="Levine 1999 pp. 2567–2596">Levine, Judah (1999). "Introduction to time and frequency metrology". Review of Scientific Instruments. AIP Publishing. 70 (6): 2567–2596. Bibcode:1999RScI...70.2567L. doi:10.1063/1.1149844. ISSN 0034-6748.</ref> Its main tasks are the realization of the second as the SI unit of measurement for time and the establishment of time standards and frequency standards as well as their dissemination.<ref name="BIPM">"time and frequency". BIPM. Retrieved 2021-01-26.</ref>

See also

Main article: Outline of metrology and measurement

• Allan variance
• Atomic clock
• Chronometry
• Clock drift
• Coordinated Universal Time
• Frequency drift
• History of timekeeping devices
• Horology
• International Bureau of Weights and Measures
• International Earth Rotation and Reference Systems Service
• Time and Frequency Standards Laboratory
• Time deviation

Further reading

• IEEE Guide for Measurement of Environmental Sensitivities of Standard Frequency Generators (Revision of IEEE Std 1193 - 1994), Piscataway, NJ, USA: IEEE, doi:10.1109/ieeestd.2004.94440, ISBN 0-7381-3711-1
• IEEE Standard Definitions of Physical Quantities for Fundamental Frequency and Time Metrology—Random Instabilities, Piscataway, NJ, USA: IEEE, doi:10.1109/ieeestd.2008.4797525, ISBN 978-0-7381-6855-5