IRE Transactions on Instrumentation · 1962 · 18 citations · 4 references
EngineeringPhysicsAtomic PhysicsInstrumentationMetrologyAtomic ClocksFrequency MetrologyMeasurement In ScienceTime MeasurementTime MetrologyTime-frequency AnalysisAtomic Frequency StandardsAtomic Transition FrequenciesCesium Frequency StandardsTime Interval MeasurementTime Scales
The atomic time scale A.1 is based on an assumed frequency of 9 192 631 770 cps of Ephemeris time, and is derived from the operation of cesium resonators at 9 laboratories. Coordinated transmissions of time and frequency make the atomic time scale available. The International Committee of Weights and Measures may redefine the unit of time interval, the second, by an atomic transition in 1966.
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Frequency of Cesium in Terms of Ephemeris Time
Wm. Markowitz, R. G. Hall, L. Essen et al. · Physical Review Letters · 1958 · 190 citations
Variation in the Speed of Rotation of the Earth since June 1955
L. Essen, J. V. L. PARRY, Wm. Markowitz et al. · Nature · 1958 · 32 citations