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Real-time Solution of Atomic Clock Operating Parameters Based on Adaptive Kalman Filtering
Authors:Hou Juan  Dong Shao-wu  Qu Li-li  Wang Ji-gang  He Zai-min
Institution:1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600;2. Graduate University of Chinese Academy of Sciences, Beijing 100049;3. School of Geodesy & Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005
Abstract:The real-tine and accurate knowledge of the operation of an atomic clock is of great significance to satellite navigation and time keeping. In the light of the problems which exist in the real-time solution of the atomic clock operating parameters by means of the standard Kalman filtering, the method for applying the adaptive Kalman filtering model based on the prediction residual to the real-time solution of the clock parameters is proposed. An adaptive factor is constructed by the model based on the standard Kalman filtering model so that the accurate and reliable estimates of the operating parameters may be given rather fast after the frequency modulation or phase modulation of the atomic clock. Finally, in combination with the 3 computational examples of the work on the navigation and time keeping, the effectiveness of the method is verified.
Keywords:Time  Method  Data analysis
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