Update on Time and Frequency Activities at NIST

T.E. Parker, D.B. Sullivan

Abstract:	The mission and organization of the Time and Frequency Division of the National Institute of Standards and Technology (NIST) are reviewed and a discussion is presented of recent activities. Among the major recent milestones have been the development of cold-atom frequency standards, including the construction of a new cesium-fountain frequency standard and the design of a standard for operation on the International Space Station. In addition, the use of GPS carrier phase for frequency transfer at the 1x10^-15 level has been demonstrated, and the power radiated by WWVB has been increased to 50 kW. Other areas discussed include time scales, time transfer, optical frequency standards, and time and frequency dissemination services.
Published in:	Proceedings of the 31th Annual Precise Time and Time Interval Systems and Applications Meeting December 7 - 9, 1999 Marriott's Laguna Cliffs Resort Dana Point, California
Pages:	231 - 240
Cite this article:	Parker, T.E., Sullivan, D.B., "Update on Time and Frequency Activities at NIST," Proceedings of the 31th Annual Precise Time and Time Interval Systems and Applications Meeting, Dana Point, California, December 1999, pp. 231-240.
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