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- W3033723114 abstract "With the accomplishment of the BDS3 basic system on December 27, 2018 and its beginning to provide initial services, the performance of BDS3 on-orbit new hydrogen and rubidium atomic clock which is an important factor affecting its positioning and timing performance is needed to be evaluated urgently. Based on the precise clock products issued by Wuhan University, the noise level, frequency accuracy, frequency drift rate and frequency stability of BDS3 satellite hydrogen and rubidium atomic clock are evaluated and analyzed, and the comparison with the performance of BDS2 satellite atomic clock is also done. The experimental results show that the noise levels of hydrogen clock and rubidium clock are 0.157 ns and 0.178 ns, respectively, which are very close but better that those of BDS2 satellite (0.478 ns). BDS3 rubidium clock is greatly affected by frequency drift, with its daily frequency drift rate up to 10−13. While hydrogen clock is less affected by frequency drift, and its daily frequency drift rate is in the order of 10−14. The frequency accuracy level of both hydrogen and rubidium clock is better than the order of 10−11, and some satellites can reach the order of 10−12. The frequency stability of BDS3 rubidium clock is worse than that of hydrogen clock, but still greatly improved compared with that of BDS2 atomic clock. The mean values of frequency stability at thousand second, ten thousand second and one day of hydrogen clock are 3.85 × 10−14, 2.58 × 10−14 and 8.8 × 10−15, respectively, while the values of rubidium clock are 3.96 × 10−14, 2.65 × 10−14 and 1.40 × 10−14, respectively. The short-term stability (less than ten thousand seconds) of the two kinds of atomic clocks is similar, but the stability of hydrogen clock at one day is better than rubidium clock." @default.
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- W3033723114 date "2020-01-01" @default.
- W3033723114 modified "2023-09-24" @default.
- W3033723114 title "Performance Evaluation and Analysis of Beidou-3 On-orbit Atomic Clock" @default.
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- W3033723114 doi "https://doi.org/10.1007/978-981-15-3715-8_19" @default.
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