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Time standard

A time standard is a specification for measuring time: either the rate at which time passes or points in time or both. In modern times, several time specifications have been officially recognized as standards, where formerly they were matters of custom and practice. An example of a kind of time standard can be a time scale, specifying a method for…

Standards & Measurement

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Overview

Terminology

Definitions of the second

Current time standards

Time standards based on Earth rotation

Time standards for planetary motion calculations

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Map overview Semantic statistics

Time standard

Nodes83
Edges82
Triples43
Avg. degree1.98
Density0.024096
Components1

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Time standard

Top relations

related to Time standards for planetary motion calculations · 26
Time standard → Earth, Earth's, Ephemeris, Ephemeris DE200, Ephemeris Time, ET, ET's, For, International Astronomical Union, International Atomic Time, It, Jet Propulsion Laboratory Development, JPL, SI, Some, Sun, TAI, TDT, Teph, Terrestrial Dynamical Time
related to Current time standards · 12
Time standard → BIPM, Earth's, Geocentric Coordinate Time, GNSS, International Atomic Time, International Bureau, Measures, TAI, TCG, Terrestrial Time, TT, Weights
is a · 1
Time standard → specification for measuring time

Important terminology Word statistics

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Important terminology

time standard day second mean atomic earth's earth defined based tai scale astronomical standards ut1 seconds solar tt utc ephemeris

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Time standardis aspecification for measuring time0.90text
Earth's wobbleinstance ofThere are also other perturbations0.80text
but these are less than a second per year.Sidereal time is time by the starsinstance ofThere are also other perturbations0.80text
UT0instance ofVersions of Universal Time0.80text
UT2 have been defined but are no longer in useinstance ofVersions of Universal Time0.80text
Time standardrelated to Current time standardsGeocentric Coordinate Time0.60section
Time standardrelated to Current time standardsTCG0.60section
Time standardrelated to Current time standardsEarth's0.60section
Time standardrelated to Current time standardsInternational Atomic Time0.60section
Time standardrelated to Current time standardsTAI0.60section
Time standardrelated to Current time standardsInternational Bureau0.60section
Time standardrelated to Current time standardsWeights0.60section

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