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Publication Citation: A common-view disciplined oscillator

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Author(s): Michael A. Lombardi; Aaron P. Dahlen;
Title: A common-view disciplined oscillator
Published: May 24, 2010
Abstract: This paper describes a common-view disciplined oscillator (CVDO) that locks to a reference time scale through the use of common-view Global Positioning System (GPS) satellite measurements. A Proportional-Integral-Derivative (PID) controller obtains near real-time common-view GPS measurements from the Internet and provides steering corrections to a local oscillator. A CVDO can be locked to any time scale that makes real-time common-view data available and can serve as a high accuracy, self-calibrating frequency and time standard. Measurement results are presented where a CVDO is locked to UTC(NIST), the coordinated universal time scale maintained at the National Institute of Standards and Technology (NIST) in Boulder, Colorado.
Citation: Review of Scientific Instruments
Volume: 81
Pages: 6 pp.
Keywords: disciplined oscillator,GPS,Internet,time scale,time transfer
Research Areas: Physics, Time and Frequency
PDF version: PDF Document Click here to retrieve PDF version of paper (1MB)