TAI
E116183
TAI is the high-precision time standard used worldwide as the basis for civil timekeeping and scientific measurements.
All labels observed (1)
| Label | Occurrences |
|---|---|
| TAI canonical | 2 |
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
atomic time scale
ⓘ
time standard ⓘ |
| abbreviationFor |
International Atomic Time
ⓘ
surface form:
Temps Atomique International
|
| accuracy | high accuracy ⓘ |
| applicationDomain |
astronomy
ⓘ
fundamental physics experiments ⓘ metrology ⓘ satellite navigation ⓘ telecommunications ⓘ |
| basedOn |
SI second
ⓘ
atomic clocks ⓘ |
| constructedFrom |
ensemble of atomic clocks worldwide
ⓘ
primary frequency standards ⓘ secondary frequency standards ⓘ |
| coordinatedBy |
International Bureau of Weights and Measures
ⓘ
surface form:
BIPM Time Department
|
| coordinateFrame | geocentric ⓘ |
| definedBy | BIPM Circular T ⓘ |
| doesNotInclude | leap seconds ⓘ |
| epoch | 1958-01-01T00:00:00 ⓘ |
| epochTimeScale | TAI ⓘ |
| fullName | International Atomic Time ⓘ |
| governingBody |
CIPM
ⓘ
International Committee for Weights and Measures ⓘ |
| languageOfOrigin | French ⓘ |
| maintainedBy |
International Bureau of Weights and Measures
ⓘ
surface form:
BIPM
International Bureau of Weights and Measures ⓘ
surface form:
Bureau International des Poids et Mesures
|
| referenceSystem | terrestrial timekeeping ⓘ |
| relatedStandard |
GPS time
ⓘ
TAI(k) laboratory realizations ⓘ TT ⓘ Coordinated Universal Time ⓘ
surface form:
UTC
|
| relationToEarthRotation | independent of irregularities in Earth rotation ⓘ |
| relationToUT1 | not adjusted to match Earth rotation ⓘ |
| relationToUTC |
UTC differs from TAI by an integer number of seconds
ⓘ
UTC is derived from TAI by inserting leap seconds ⓘ |
| scope | global ⓘ |
| stability | high stability ⓘ |
| standardizedBy |
International System of Units
ⓘ
SI ⓘ |
| startYear | 1958 ⓘ |
| timeScaleClass | atomic time ⓘ |
| timeScaleType |
continuous
ⓘ
uniform ⓘ |
| timeUnit | SI second at sea level on the geoid ⓘ |
| usedFor |
basis for civil timekeeping
ⓘ
reference for GPS time ⓘ reference for UTC ⓘ reference for other atomic time scales ⓘ scientific measurements ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.