Atomic clock joint time keeping method and device

Abstract

The invention belongs to the technical field of atomic clocks, and discloses an atomic clock joint time keeping method and device, and the method comprises the steps: removing an obtained traceability comparison link error of a first remote reference clock, and obtaining a second remote reference clock, wherein the first remote reference clock is a far-end time scale for superposing the traceability comparison link error; converting the first clock difference data into second clock difference data relative to the remote reference clock; eliminating the frequency drift of each hydrogen clock in the atomic clocks according to the second clock difference data; converting the third clock difference data of the plurality of atomic clocks with the frequency drift eliminated relative to the second remote reference clock into fourth clock difference data relative to the reference clock; and generating a time scale according to the fourth clock difference data. The method has the beneficial effects that the remote reference clock is introduced for joint timekeeping and participates in timekeeping of the local clock group, timekeeping resources are increased, and local time with higher performance can be obtained; the remote reference clock is high in long-term stability and small in frequency drift, the frequency drift of the local hydrogen clock is calibrated by taking the remote reference clock as reference, the frequency drift of the generation time scale is reduced, and the long-term stability is improved.

Description

technical field [0001] The invention relates to the technical field of atomic clocks, in particular to a combined atomic clock timekeeping method and device. Background technique [0002] At present, the common integrated atomic time algorithms mainly include weighted average algorithm, Kalman filter algorithm, wavelet decomposition algorithm and so on. One of the most widely used is the weighted average algorithm. [0003] The weighted average algorithm can only average the atomic clock with a single weight, regardless of the stability of the time frequency in all smoothing time periods, that is, the weighted average algorithm can only suppress one kind of noise, or make the noise of a specified smoothing time point The output time scale stability is optimal. However, in the case of focusing on short-term stability, the short-term stability is used to weight the hydrogen clock, which leads to a large hydrogen clock weight, and when the hydrogen clock frequency drift is in...

AI Technical Summary

Problems solved by technology

However, in the case of focusing on short-term stability, the short-term stability is used to determine the weight of the hydrogen clock, and when the hydrogen clock frequency drift is introduced into the generated synthetic atoms, the long-term stability is poor.

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