Hydrogen cesium time scale fusion method based on Vondark-Cepek filtering

Abstract

The invention provides a hydrogen and cesium time scale fusion method based on Vondik-Cepek filtering. Firstly, using an exponential filtering method for respectively generating a clock group time scale for a hydrogen clock group and a cesium clock group; and then selecting a Vondik-Cepek combined filtering key parameter according to a least square principle, and further performing performance enhancement on the cesium clock group time scale through differential information of the hydrogen clock group time scale time sequence, thereby obtaining a hydrogen-cesium fusion time scale. According tothe method, the noise is effectively suppressed, meanwhile, the characteristics of hydrogen and cesium atomic clocks can be considered, fusion is carried out on the clock group scale level, and the time scale with good long-term and short-term stability is generated.

Description

technical field [0001] The invention belongs to the field of time frequency and signal processing, and relates to a time scale fusion method. Background technique [0002] At present, high-precision time has become a vital parameter in a country's science and technology, economy, military and social life. It is widely used in navigation, electric power, communication, aviation, national defense and other fields. As the most basic physical quantity, it is very important to improve the level of national scientific research. There is also a fundamental role. For this reason, every time-frequency laboratory in the world has its own set of atomic clocks, and each atomic clock can generate a time scale. But keeping time cannot rely on a single atomic clock, because every physical device has the potential for anomalies. The time scale algorithm is to calculate a standard time based on the time of each clock in the clock watch group according to the demand. The purpose is to find ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that when the hydrogen atomic clock is used as a reference to measure the cesium atomic clock, the main noise is phase white noise. After filtering by mathematical methods, the short-term stability of its time scale will still be affected by the noise of the cesium atomic clock.

However, when the hydrogen clock is corrected with the time scale of the cesium clock group, when the hydrogen clock fails, the reliability of the generated time scale cannot be guaranteed.

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