Long-Term Evaluation of GPS Timing Receiver Failures

Ulrich Schmid, Dieter Höchtl

Abstract:	This paper provides an overview of the results of a continuous, 2-month experimental evaluation of all timing data provided by several GPS receivers. The primary purpose of this experiment was to provide measurement data facilitating fault modeling in our project SynUTC, which aims at external clock synchronization in fault-tolerant distributed real-time systems. As expected, the GPS receivers under test exhibited a wide variety of failures, ranging from transient omissions up to considerable deviations of the timing signals provided. Whereas those findings justify the appropriateness of our basic failure assumptions, it became nevertheless apparent that rerunning the experiment for a longer duration and with new brands/models of GPS receivers is advisable.
Published in:	Proceedings of the 29th Annual Precise Time and Time Interval Systems and Applications Meeting December 2 - 4, 1997 Sheraton Long Beach Hotel Long Beach, California
Pages:	165 - 180
Cite this article:	Schmid, Ulrich, Höchtl, Dieter, "Long-Term Evaluation of GPS Timing Receiver Failures," Proceedings of the 29th Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, December 1997, pp. 165-180.
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