<abstract xmlns="http://www.w3.org/1999/xhtml">

A stable and reliable time keeping system depends on the integrity monitoring of the atomic frequency standard. This paper reports a scheme for autonomous integrity monitoring of multiple atomic clocks, which combines the frequency standard comparison method and the frequency jump detection method. The frequency standard comparison method uses multi-channel synchronous acquisition technology and digital frequency measurement technology to realize the precise measurement of multiple atomic frequency standards. The frequency jump detection method uses adaptive filtering to predict the relative frequency difference and give an accurate and timely alarm for the abnormal of frequency jump. The results show that the noise floor frequency standard comparator is better than 6.5×10−15 s. For a relative frequency deviation of 2.0×10−6 Hz, the probability of anomaly detection is almost 100 %. The system has high frequency measurement resolution and fast alarm of frequency jump, which can meet the real-time requirements of a time keeping system for the integrity monitoring of multiple atomic clocks.
</abstract>

A stable and reliable time keeping system depends on the integrity monitoring of the atomic frequency standard. This paper reports a scheme for autonomous integrity monitoring of multiple atomic clocks, which combines the frequency standard comparison method and the frequency jump detection method. The frequency standard comparison method uses multi-channel synchronous acquisition technology and digital frequency measurement technology to realize the precise measurement of multiple atomic frequency standards. The frequency jump detection method uses adaptive filtering to predict the relative frequency difference and give an accurate and timely alarm for the abnormal of frequency jump. The results show that the noise floor frequency standard comparator is better than 6.5×10−15 s. For a relative frequency deviation of 2.0×10−6 Hz, the probability of anomaly detection is almost 100 %. The system has high frequency measurement resolution and fast alarm of frequency jump, which can meet the real-time requirements of a time keeping system for the integrity monitoring of multiple atomic clocks.

A Study on Autonomous Integrity Monitoring of Multiple Atomic Clocks

Key Laboratory of Time and Frequency Primary Standards

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"A Study on Autonomous Integrity Monitoring of Multiple Atomic Clocks"}

A stable and reliable time keeping system depends on the integrity monitoring of the atomic frequency standard. This paper reports a scheme for autonomous...

A Study on Autonomous Integrity Monitoring of Multiple Atomic Clocks

Published Online: Aug 05, 2022

Page range: 202 - 207

Received: Nov 22, 2021

Accepted: Jul 04, 2022

DOI: https://doi.org/10.2478/msr-2022-0025

Keywords
Autonomous integrity monitoring, frequency standard comparison, frequency jump detection, noise floor

© 2022 Bo Xiao et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A Study on Autonomous Integrity Monitoring of Multiple Atomic Clocks

Published Online: Aug 05, 2022

Page range: 202 - 207

Received: Nov 22, 2021

Accepted: Jul 04, 2022

DOI: https://doi.org/10.2478/msr-2022-0025

KeywordsAutonomous integrity monitoring, frequency standard comparison, frequency jump detection, noise floor

© 2022 Bo Xiao et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Autonomous integrity monitoring, frequency standard comparison, frequency jump detection, noise floor