| DOI | Resolve DOI: https://doi.org/10.1109/FREQ.1983.200648 |
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| Author | Search for: Costain, C. C.1; Search for: Daams, H.1; Search for: Boulanger, J.1; Search for: Douglas, R. J.1 |
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| Affiliation | - National Research Council of Canada
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| Sponsor | Search for: IEEE |
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| Format | Text, Article |
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| Conference | P37th annual Frequency Control Symposium 1983, June 1-3, 1983, Philadelphia, Pennsylvania, USA |
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| 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. Two satellite ground stations with 3 m antennas and 1 W power have been installed near the NRC time laboratory. Two way transfer using low power CW tones via Telesat Canada Anik satellites in the 6/4 GHz commercial band has achieved subnanosecond precision. Tests of prn code transfer are planned. |
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| Publication date | 1983-06-01 |
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| Publisher | IEEE |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRC-INMS-3185 |
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| NPARC number | 8896649 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | b3f3398a-f136-4d14-94fc-a2b098a3ae2d |
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| Record created | 2009-04-22 |
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| Record modified | 2023-11-06 |
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