Intercontinental Clock Synchronization With the Block I VLBI System

Mitchell G. Roth

Abstract:	The Block 1 Very Long Baseline Interferometer (VLBI) operated by the Deep Space Network (DSN) is used to make weekly measurements of the relative epoch and rate offsets between the time standards in the global network of OSN stations. Over the past year, the precision of these measurements has routinely achieved sub-microsecond levels for epoch offset and accuracies of better than one part in 1012 for rate offset. The implementation of the phase calibrator system will permit absolute measurement of epoch offset to better than 10 nano seconds. With the near-real-time playback and on-line storage of VLBI data, the Block I system typically produces clock parameters within 48 hours from the time of observation.
Published in:	Proceedings of the 13th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 3, 1981 Naval Research Laboratory Washington, DC
Pages:	489 - 502
Cite this article:	Roth, Mitchell G., "Intercontinental Clock Synchronization With the Block I VLBI System," Proceedings of the 13th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, DC, December 1981, pp. 489-502.
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