SUBMICROSECOND COMPARISON OF INTERCONTINENTAL CLOCK SYNCHRONIZATION BY VLBI AND THE NTS SATELLITE

William J. Hurd, Jim Bussion, Jay Oaks, Thomas McCaskill, Schuyler C. Wardrip, Hugh Warren, Gary Whitworth

Abstract:	The intercontinental clock synchronization capabilities of Very Long Baseline Interferometry (VLBI) and the Navigation Technology Satellite (NTS) were compared in May 1978 by using both methods to synchronize the Cesium clocks at the NASA Deep Space Net complexes at Madrid, Spain and Goldstone, California. The VLBI experiments used the Wideband VLBI Data Acquisition System developed at the NASA Jet Propulsion Laboratory. The NTS Satellites which were designed and built by the Naval Research Laboratory were used with NTS Timing Receivers developed by the Goddard Space Flight Center. The two methods agreed at about the one half microsecond level. The VLBI System also obtained long term stability information on the HP5061A-004 Cesium standards by measuring T/T over four 3-4 day intervals obtaining stability estimates of (1 + 1) x 10-13 for the combined timing systems.
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:	629 - 642
Cite this article:	Hurd, William J., Bussion, Jim, Oaks, Jay, McCaskill, Thomas, Wardrip, Schuyler C., Warren, Hugh, Whitworth, Gary, "SUBMICROSECOND COMPARISON OF INTERCONTINENTAL CLOCK SYNCHRONIZATION BY VLBI AND THE NTS SATELLITE," Proceedings of the 10th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, November 1978, pp. 629-642.
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