Characterization of nonstationary atomic clocks

Lorenzo Galleani; Patrizia Tavella

doi:10.1117/12.725553

13 June 2007 Characterization of nonstationary atomic clocks

Lorenzo Galleani, Patrizia Tavella

Proceedings Volume 6603, Noise and Fluctuations in Photonics, Quantum Optics, and Communications; 66030Z (2007) https://doi.org/10.1117/12.725553
Event: SPIE Fourth International Symposium on Fluctuations and Noise, 2007, Florence, Italy

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.

Citation Download Citation

Lorenzo Galleani and Patrizia Tavella "Characterization of nonstationary atomic clocks", Proc. SPIE 6603, Noise and Fluctuations in Photonics, Quantum Optics, and Communications, 66030Z (13 June 2007); https://doi.org/10.1117/12.725553

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