title: The dynamic Allan Variance IV: characterization of atomic clock anomalies.
abstract: The number of applications where precise clocks play a key role is steadily increasing, satellite navigation being the main example. Precise clock anomalies are hence critical events, and their characterization is a fundamental problem. When an anomaly occurs, the clock stability changes with time, and this variation can be characterized with the dynamic Allan variance (DAVAR). We obtain the DAVAR for a series of common clock anomalies, namely, a sinusoidal term, a phase jump, a frequency jump, and a sudden change in the clock noise variance. These anomalies are particularly common in space clocks. Our analytic results clarify how the clock stability changes during these anomalies.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Galleani
authors.forename: Patrizia
authors.initials: P
authors.lastname: Tavella