Statements (19)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
cesium fountain clock
|
| gptkbp:accuracy |
less than 0.000 000 000 000 000 1 seconds error per day
|
| gptkbp:activeYearsStart |
1999
|
| gptkbp:alsoKnownAs |
gptkb:NIST_primary_frequency_standard
|
| gptkbp:contributedTo |
gptkb:International_Atomic_Time
Coordinated Universal Time |
| gptkbp:country |
gptkb:United_States
|
| gptkbp:frequency |
microwave transition of cesium-133
|
| https://www.w3.org/2000/01/rdf-schema#label |
NIST-F1
|
| gptkbp:locatedIn |
gptkb:Boulder,_Colorado
|
| gptkbp:operatedBy |
gptkb:National_Institute_of_Standards_and_Technology
|
| gptkbp:replacedBy |
gptkb:NIST-7
|
| gptkbp:status |
active
|
| gptkbp:technology |
laser-cooled cesium atoms
|
| gptkbp:usedFor |
national time standard
realization of the SI second |
| gptkbp:bfsParent |
gptkb:Master_Clock_for_the_United_States
gptkb:NIST_Time_Scale |
| gptkbp:bfsLayer |
6
|