Answers are grounded in this paper and cite their sources.
The accuracy of the National Research Council 2.1 m cesium beam frequency standard has been re-evaluated using the two NRC hydrogen masers as stable comparison standards. At the time of re-evaluation, the various uncertainties gave rise to an error limit of ±3.8 × 10 -12 , with a most probable value of ±1.5 × 10 -12 if they were assumed to be random. After application of all corrections, the agreement with several other cesium standards, as determined from monthly VLF comparisons during January to March, 1968, appears generally to be within the narrower limits of ±1.5 × 10 -12 .
No takes yet. Share an insight, caveat, or question.
Mungall et al. (1968) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: