Acta Metrologica Sinica  2018, Vol. 39 Issue (3): 397-400    DOI: 10.3969/j.issn.1000-1158.2018.03.22
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A Method for Estimating Frequency Stability of Atomic Clock
WANG Yu-zhuo,ZHANG Ai-min,ZHANG Yue,YANG Zhi-qiang
National Institute of Metrology, Beijing 100029, China
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Abstract  To evaluate reasonably the absolute frequency stability of atomic clocks in the same experimental condition, this paper analyzed the algorithm model and solving process theoretically and studied the method for estimating absolute frequency stability when correlated noises exsisted. It is evaluated by the simulated data of three atomic clocks. Under the assumption of independent noises, the deviation between the test result and theoretical value became larger with the increase of the noise correlation. Considering the noise correlation, the relative error of the test result is always less than 1.7%. The effectiveness of the method was further proved with 360-day real data of four cesium clocks in NIM (National Institute of Metrology) time keeping lab.
Key wordsmetrology      correlation between atomic clocks      frequency stability      covariance matrix      Allan varianc     
Received: 24 February 2017      Published: 12 April 2018
PACS:  TB939  
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WANG Yu-zhuo
ZHANG Ai-min
ZHANG Yue
YANG Zhi-qiang
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WANG Yu-zhuo,ZHANG Ai-min,ZHANG Yue, et al. A Method for Estimating Frequency Stability of Atomic Clock[J]. Acta Metrologica Sinica, 2018, 39(3): 397-400.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2018.03.22     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2018/V39/I3/397
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