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Detection of changes in clock noise using the time–frequency spectrum

Lorenzo Galleani

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The frequency spectrum of the atomic clock noise can change with time for several reasons. We develop a method to represent the time–frequency spectrum of clock noise. The method can detect and identify clock anomalies, since they generate non-stationarities in the time–frequency spectrum. We apply the method to numerical and experimental data.


PACS

05.40.Ca Noise

05.40.Fb Random walks and Levy flights

06.30.Ft Time and frequency

Subjects

Instrumentation and measurement

Statistical physics and nonlinear systems

Dates

Issue 6 (December 2008)

Received 16 July 2008

Published 5 December 2008



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