| 11. | In 1977, the current phase modulated time signal was added to the transmissions.
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| 12. | These public time signals were formerly established in many seaport cities.
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| 13. | The official time signal is given by the Time and Frequency Standards Laboratory.
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| 14. | The Bureau des Longitudes started daily time signal service starting in May 1910.
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| 15. | Vancouver radio station CKNW also broadcasts time signals, using a chime every half-hour.
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| 16. | These are used to generate timing signals for the downlink of science data.
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| 17. | Dually, a discrete-time signal gives rise to a periodic frequency spectrum.
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| 18. | Initially he broadcast time signals to Allegheny city business and the Pennsylvania Railroad.
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| 19. | All chronometers and watches should be checked regularly with a radio time signal.
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| 20. | The station has a long history of a powerful night-time signal.
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