| Frequency steering of spaceborne clocks based on XPNAV-1 observations |
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| 作者姓名： | Mengna HAN Minglei TONG Liansheng LI Yongqiang SHI Tinggao YANG Yuping GAO |
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| 作者单位： | 1. National Time Service Center, Chinese Academy of Sciences;2. School of Astronomy and Space Science, University of Chinese Academy of Sciences;3. Beijing Institute of Control Engineering |
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| 基金项目： | the National Natural Science Foundation of China (Nos. U1831130 and U1531112)； |
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| 摘 要： | Due to high stable rotations, timing of pulsars provides a natural tool to correct the frequency deviation of spaceborne atomic clocks. Based on processing the observational data about a year of Crab pulsar given by XPNAV-1 satellite, we study the possibility of correcting the frequency deviation of spaceborne atomic clocks using pulsar timing. According to the observational data in X-ray band and the timing model parameters from radio observations, the pre-fit timing residuals with a level of 6...
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| 收稿时间： | 18 May 2022 |
Frequency steering of spaceborne clocks based on XPNAV-1 observations |
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| Mengna HAN,Minglei TONG,Liansheng LI,Yongqiang SHI,Tinggao YANG,Yuping GAO.Frequency steering of spaceborne clocks based on XPNAV-1 observations[J].Chinese Journal of Aeronautics,2023,36(6):266-278. |
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| Institution: | 1. National Time Service Center, Chinese Academy of Sciences, Xi’ an 710600, China;2. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China;3. Beijing Institute of Control Engineering, Beijing 100190, China |
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| Abstract: | Due to high stable rotations, timing of pulsars provides a natural tool to correct the frequency deviation of spaceborne atomic clocks. Based on processing the observational data about a year of Crab pulsar given by XPNAV-1 satellite, we study the possibility of correcting the frequency deviation of spaceborne atomic clocks using pulsar timing. According to the observational data in X-ray band and the timing model parameters from radio observations, the pre-fit timing residuals with a level of 67.66 µs are obtained. By fitting the slope of the timing residuals affected by the faked frequency-biased reference clock, we estimated successfully the relative frequency deviation of the reference clock. For a satellite clock with frequency deviation of the order about 10?12, a calibration accuracy with relative error of about 2% can be obtained from the Crab pulsar’s data for one year. The stability of the time scale based on Crab pulsar is about 10?12 for an interval of one year. |
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| Keywords: | Pulsar time scale Pulsar timing Atomic clock Frequency steering X-ray observation |
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