title: Algorithms for international atomic time.
abstract: This article reviews the creation and technical evolution of atomic time scales. In particular, we focus our attention on the method of calculation and the characteristics of International Atomic Time (TAI), and show how it is disseminated at the ultimate level of precision.
authors.affiliation: International Bureau for Weights and Measures (BIPM), Sevres, France. gpanfilo@bipm.org
authors.forename: Gianna
authors.initials: G
authors.lastname: Panfilo
authors.forename: E Felicitas
authors.initials: EF
authors.lastname: Arias
mesh_terms: D007394:International System of Units / Q000592:standards*; D038622:Internationality; D009991:Oscillometry / Q000592:standards*; D012015:Reference Standards; D013997:Time Factors