TEMPUS A PROPOSAL FOR AN INTERNATIONAL TIME TRANSFER AND PRECISION TRACKING SATELLITE

David C. Holmes

Abstract:	Since W. G. Cady carried his piezo resonator to seven laboratories in England, France, Italy and the United States in 1923, the primary method of coordinating time between international stations has involved the use of traveling clocks. These were first transported by ship and train, more recently by aircraft. Project TEMPUS also requires traveling clocks out these will revolve thousands of kilometers above the earth in artificial satellites. Several methods of international time transfer are now available and a comparison of various concepts derived from data published by the European Satellite Agency is shown below. Accuracy Remarks Method VLBI (pulsars) Insec Slow, expensive ground stations. TV relay via satellite 10 nsec Requires wide-band satellite transponder with satellite visible from all stations.
Published in:	Proceedings of the 10th Annual Precise Time and Time Interval Systems and Applications Meeting November 28 - 30, 1978 Goddard Space Flight Center Greenbelt, Maryland
Pages:	693 - 707
Cite this article:	Holmes, David C., "TEMPUS A PROPOSAL FOR AN INTERNATIONAL TIME TRANSFER AND PRECISION TRACKING SATELLITE," Proceedings of the 10th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, November 1978, pp. 693-707.
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