The National Institute of Standards and Technology (NIST) is deploying disciplined oscillators that are referenced to the UTC(NIST) time scale through common-view observations of Global Positioning System (GPS) satellites. We present measurement results from four NIST disciplined oscillators (NISTDOs), three located in the United States, and one located in Concepcion, Chile. These devices replicate the NIST time scale at remote sites and uncertainties of less than 5 ns are demonstrated at all locations. We verified, and in some cases improved the results, by utilizing UTC(CNM), the national time scale of Mexico, as an independent check standard. Further verification was obtained by directly comparing a NISTDO to UTC(NIST) in Boulder, Colorado.
Proceedings Title: Proceedings of 2012 Precise Time and Time Interval (PTTI) Meeting
Conference Dates: November 26-29, 2012
Conference Location: Reston, VA
Pub Type: Conferences
disciplined oscillator, frequency, time, time scale