Accession Number : ADP002456

Title :   Time Dissemination from the National Research Council of Canada,


Personal Author(s) : Costain,C. C. ; Daams,H. ; Boulanger,J. S. ; Douglas,R. J.

Report Date : 1983

Pagination or Media Count : 3

Abstract : CHU Canada broadcasts continuously on 3.330 MHz, 7.335 MHz and 14.670 MHz with powers of 3 kW, 10 kW and 3 kW respectively. Voice announcements of the time are made in French and English each minute, and an FSK time code is broadcast in the 31st to 39th seconds-pulses. The NRC time signals are broadcast Canada-wide each day by the Canadian Broadcasting Corporation at 12.00 noon ET on their French network and at 1.00 p.m. ET on their English network. Talking clocks in French and English can be accessed on the DDD telephone network. The FSK code is also available on the DDD telephone network, with triply redundant code generators and logic circuits to ensure an error free code. Prototype remote clocks have been developed which measure and correct for the delay from the remote location, ensuring millisecond accuracy even via satellite. The two-way satellite time transfer experiment using the Symphonie satellite terminated July 1, 1983 after 4 years with France and two years with Germany.

Descriptors :   *Time standards, *Communication and radio systems, Canada, Communication satellites, Time, Accuracy, Global communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE