Statements (18)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
atomic clock
frequency standard |
| gptkbp:accuracy |
~1 part in 10^15
|
| gptkbp:category |
precision measurement instrument
|
| gptkbp:firstDemonstrated |
1960
|
| gptkbp:frequency |
1,420,405,751.768 Hz
|
| https://www.w3.org/2000/01/rdf-schema#label |
atomic hydrogen maser
|
| gptkbp:inventedBy |
gptkb:Norman_Ramsey
|
| gptkbp:operates |
hyperfine transition
|
| gptkbp:provides |
ultra-stable frequency reference
|
| gptkbp:used_in |
gptkb:International_Atomic_Time
gptkb:Very_Long_Baseline_Interferometry radio astronomy timekeeping deep space navigation |
| gptkbp:uses |
hydrogen atom
|
| gptkbp:bfsParent |
gptkb:The_Atomic_Hydrogen_Maser
|
| gptkbp:bfsLayer |
7
|