Abstract

On August 1, at 0000 Universal Time, an advance of 50 milliseconds was effected in the phase of the time signals broadcast by five standard frequency broadcasting stations in various parts of the world (GBR and MSF at Rugby, England; NBA, Canal Zone; WWV, Beltsville, Md.; and WWVH, Hawaii). Such adjustments are made whenever necessary in order to maintain the broadcast signals, which are based on atomic frequency standards, within 50 milliseconds of Universal Time. Variations of the time scale reflect a small, but perceptible fluctuation in the speed of the earth's rotation.

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