Statements (20)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
atomic clock
|
| gptkbp:accuracy |
extremely high
|
| gptkbp:built |
1955
|
| gptkbp:defines |
gptkb:SI_second
|
| gptkbp:frequency_standard |
9,192,631,770 Hz
|
| https://www.w3.org/2000/01/rdf-schema#label |
cesium atomic clock
|
| gptkbp:inventedBy |
gptkb:Louis_Essen
|
| gptkbp:location |
gptkb:National_Physical_Laboratory,_UK
|
| gptkbp:measures |
gptkb:time_zone
|
| gptkbp:principle |
hyperfine transition of cesium-133
|
| gptkbp:type |
primary frequency standard
|
| gptkbp:used_in |
gptkb:GPS
gptkb:NIST gptkb:US_Naval_Observatory gptkb:BIPM international time standards |
| gptkbp:uses_element |
gptkb:cesium
|
| gptkbp:bfsParent |
gptkb:atomic_clocks
gptkb:hydrogen_maser |
| gptkbp:bfsLayer |
5
|