Accession Number : AD0698917

Title :   NOTE ON ATOMIC TIME KEEPING AT THE NATIONAL RESEARCH COUNCIL,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED PHYSICS

Personal Author(s) : Mungall,A. G. ; Daams,H. ; Bailey,R.

Report Date : 25 MAR 1969

Pagination or Media Count : 4

Abstract : Three different experimental atomic time scales have been maintained at the National Research Council of Canada. One has been based on an HP 5061A cesium standard, another on a free-running crystal oscillator, calibrated daily with respect to the NRC primary cesium standard, and a third on the HP 5061A calibrated weekly by the primary standard. Intercomparisons with the United States Naval Observatory and the National Bureau of Standards indicate that the third is probably the most accurate of the three time scales. Agreement between this scale and those of the USNO and NBS is of the order of 1 microsecond or 10 to the minus 13th power in frequency over a four-month period. (Author)

Descriptors :   (*ATOMIC CLOCKS, ACCURACY), CESIUM, CRYSTAL OSCILLATORS, CALIBRATION, STANDARDS, RELIABILITY, CANADA

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE