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Original file line number | Diff line number | Diff line change |
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--- | ||
metadata: | ||
title: CCDS, 1970 (_In_ CIPM, 1970) | ||
date: 1970-01-01 | ||
source: BIPM - Pavillon de Breteuil | ||
resolutions: | ||
- dates: | ||
- 1970-01-01 | ||
title: Definition of TAI | ||
identifier: 2 | ||
url: | ||
approvals: | ||
- type: affirmative | ||
degree: unanimous | ||
message: |- | ||
International Atomic Time (TAI) is the time reference coordinate established by the Bureau International de l'Heure on the basis of the readings of atomic clocks operating in various establishments in accordance with the definition of the second, the unit of time of the International System of Units. + | ||
In 1980, the definition of TAI was completed as follows (declaration of the CCDS, _BIPM Com. Cons. Déf. Seconde_, 1980, *9*, S 15 and Metrologia, 1981, *17*, 70): + | ||
TAI is a coordinate time scale defined in a geocentric reference frame with the SI second as realized on the rotating geoid as the scale unit. |
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Original file line number | Diff line number | Diff line change |
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--- | ||
metadata: | ||
title: CIPM, 2001 | ||
date: 2001-01-01 | ||
source: BIPM - Pavillon de Breteuil | ||
resolutions: | ||
- dates: | ||
- 2001-01-01 | ||
title: "SI units" and "units of the SI" | ||
identifier: 1 | ||
url: | ||
approvals: | ||
- type: affirmative | ||
degree: unanimous | ||
message: |- | ||
The CIPM approved in 2001 the following proposal of the CCU regarding "SI units" and "units of the SI": + | ||
"We suggest that "SI units" and "units of the SI" should be regarded as names that include both the base units and the coherent derived units, and also all units obtained by combining these with the recommended multiple and sub-multiple prefixes. + | ||
We suggest that the name "coherent SI units" should be used when it is desired to restrict the meaning to only the base units and the coherent derived units." |
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