@prefix dct: .
@prefix ns1: .
@prefix ns2: .
@prefix rdfs: .
@prefix skos: .
a skos:Concept ;
ns2:creator "European Space Agency",
"Spot Image S.A." ;
ns2:date "2010-03-23" ;
ns2:source ;
dct:created "2010-03-23" ;
dct:modified "2012-02-14" ;
ns1:hasProfile ;
rdfs:seeAlso ,
,
;
skos:altLabel "TAI" ;
skos:definition "TAI is the atomic time scale of BIPM; its unit interval is exactly one SI second at sea level. The origin of TAI is such that UT1-TAI ~ 0 on January 1st 1958, but the beginning of the TAI measurements goes back july 1955. The instability of TAI is about 6 orders of magnitude smaller than that of UT1. Quarterly values of UT1-TAI since 1962 and predicted ones are given."@en ;
skos:exactMatch ,
,
"urn:ogc:def:trs:BIPM::TAI" ;
skos:prefLabel "TAI"@en .