Assertion: local atomic clock | /r/HasProperty | linked with german master clocks
Facets:
value: at the ptb in braunschweig
type: LOCATION
Source sentences:
text: The highly accurate 77.5 kHz (approximately 3868.3 m wavelength) carrier signal is generated from local atomic clocks that are linked with the German master clocks at the PTB in Braunschweig.