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Title: Remote Calibration Of A Gps Timing Receiver To UTC(NIST) Via The Internet*
Author: Michael A. Lombardi, Andrew N. Novick, Robert m. Graham
Source: 2006 Measurement Science Conference
Year Published: 2006
Abstract: The timing pulse from a Global Positioning System (GPS) receiver is typically within 1s of Coordinated Universal Time (UTC) kept at NIST, called UTC(NIST), even if the receiver and antenna have not been calibrated for delays. However, it is not possible for most laboratories to make an accurate measurement of their GPS receivers time offset with respect to UTC(NIST), or to monitor its continuous performance. This paper presents a method for remotely calibrating a GPS timing receiver at the customers location with respect to UTC(NIST) using the commonview GPS technique and the Internet. We present data from a remote calibration of a GPS timing receiver located at Sandia National Laboratories in Albuquerque, New Mexico, about 561 km from the NIST Laboratories in Boulder, Colorado. The uncertainty of the calibration is shown to be less than 50 ns.

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