Primary time standard
id:
primary-time-standard-231-2208356
title:
Primary time standard
text:
In telecommunications, a primary time standard is a time standard that does not require calibration against another time standard. Examples of primary time, are caesium standards and hydrogen masers. The international second is based on the microwave frequency (9,192,631,770 Hz) associated with the atomic resonance of the hyperfine ground state levels of the caesium-133 atom in a magnetically neutral environment. Realizable caesium frequency standards use a strong electromagnet to deliberately i
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Primary_time_standard
date created:
2002-02-25T23:56:10Z
date modified:
2024-09-15T23:52:37Z
main entity:
{"identifier":"Q7243181","url":"https://www.wikidata.org/entity/Q7243181"}
image:
fields total:
13
integrity:
14