Status of Frequency and Time Support for NASA Systems

Paul F. Kuhnle, Paul J. Kushmeider, S. Clark Wardrip

Abstract:	The National Aeronautics and Space Administration (NASA) has Frequency and Timing Systems at many Facilities and Centers. This paper covers timing systems with spec$cations tighter than several microseconds. These ground based systems support scientific experiments and spacecraft tracking for the following programs: NASA Satellite Laser Ranging (NSLR); Network Mission Operations Support (NMOS); Kennedy Space Center (KSC); Very Long Baseline Interferometry (VLBI); Tracking Data Relay Satellite System (TDRSS) Ground Terminal Network, and the Deep Space Network (DSN). Major equipment assemblies, specifications, performance and requirements, both present and future, will be presented.
Published in:	Proceedings of the 25th Annual Precise Time and Time Interval Systems and Applications Meeting November 29 - 2, 1993 Ritz-Carlton Hotel Marina Del Rey, California
Pages:	21 - 32
Cite this article:	Kuhnle, Paul F., Kushmeider, Paul J., Wardrip, S. Clark, "Status of Frequency and Time Support for NASA Systems," Proceedings of the 25th Annual Precise Time and Time Interval Systems and Applications Meeting, Marina Del Rey, California, November 1993, pp. 21-32.
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