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Publication Citation: Time and Frequency Transfer Activities at NIST

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Author(s): Victor S. Zhang; Michael A. Lombardi;
Title: Time and Frequency Transfer Activities at NIST
Published: December 01, 2008
Abstract: The National Institute of Standards and Technology (NIST) maintains one of the world s most accurate and stable time scales, and also developed and maintains the primary frequency standard for the United States. Various techniques are used to compare the NIST time scale, UTC(NIST), and the NIST primary frequency standard to other standards located around the world. These techniques include two-way satellite time and frequency transfer (TWSTFT), code-based GPS common-view, and GPS carrier-phase comparisons. NIST provides remote time and frequency calibration services to industries and research institutes using GPS time transfer technologies. We disseminate UTC(NIST) through signals broadcast by our radio stations WWV/WWVH and WWVB, the Internet Time Service (ITS), and the Automated Computer Time Service (ACTS). NIST also conducts research intended to develop new time transfer techniques, and to improve the performance of existing methods.
Conference: The Fortieth Annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting
Proceedings: Proc. 2008 PTTI Conf.
Pages: pp. 623 - 639
Location: Reston, VA
Dates: December 1-4, 2008
Keywords: dissemination;frequency transfer;time transfer;traceability
Research Areas: Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (1MB)