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Proceedings Paper

Characterization of nonstationary atomic clocks
Author(s): Lorenzo Galleani; Patrizia Tavella
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Paper Abstract

Atomic clocks are ultra-precise time references, and because of this fact in the past 20 years they have found a fundamental application in navigation problems. The error in the localization of the user is highly dependent on the clock stability: variations of few nanoseconds in the clock phase result in an increase of the localization error by a factor of meters. Unfortunately atomic clocks are nonstationary, and their stability changes with time. We have recently proposed the DAVAR, or dynamic Allan variance, a representation of the instantaneous stability of an atomic clock. In this paper we will discuss the definition of the DAVAR and we will apply it to simulated nonstationary data, to prove its validity in clock noise characterization.

Paper Details

Date Published: 13 June 2007
PDF: 9 pages
Proc. SPIE 6603, Noise and Fluctuations in Photonics, Quantum Optics, and Communications, 66030Z (13 June 2007); doi: 10.1117/12.725553
Show Author Affiliations
Lorenzo Galleani, Politecnico di Torino (Italy)
Patrizia Tavella, INRIM (Italy)

Published in SPIE Proceedings Vol. 6603:
Noise and Fluctuations in Photonics, Quantum Optics, and Communications
Leon Cohen, Editor(s)

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