摘要
铷原子钟可靠性高、体积小、功耗低,在导航、通信等领域被广泛使用.尤其对于导航卫星星载铷原子钟,发展至今具有了优异的稳定度性能,但其固有的频率漂移特性(约E-12~E-13/天)会恶化其长期性能,影响卫星自主守时能力.通过对高性能铷原子钟的频率数据进行充分分析,评估可能导致频率漂移的物理机制,提出一种高精度频率漂移补偿的方案并开展了实验验证.结果表明,在无外部驯服情况下60天内高性能铷原子钟的漂移率可保持E-15/天量级,天稳定度达到E-15量级(Allan偏差),极大提升铷原子钟的自主守时能力.
With their high reliability,small size and low power consumption,rubidium atomic clocks are widely used in the fields of navigation,communication,etc.In particular,rubidium atomic clocks for navigation satellites have developed excellent stability.However,their inherent frequency drift characteristics(about E-12 to E-13/day)will deteriorate their long-term performance and affect the autonomous punctual timing of satellites.In this paper,we fully analyzed the frequency data of high-performance rubidium atomic clocks,aiming to figure out the physical mechanism behind the frequency drift.A high-precision frequency drift compensation scheme is proposed and experimentally verified.The results show that the drift rate of high-performance rubidium clock can be maintained in the order of E-15/day within 60 days without external taming,and the day stability can reach the order of E-15(Allan variance),which greatly improves the autonomous punctual timing ability of rubidium atomic clock.
作者
徐俊秋
李俊瑶
赵峰
康松柏
王鹏飞
明刚
XU Junqiu;LI Junyao;ZHAO Feng;KANG Songbai;Wang Pengfei;Ming Gang(CAS Key Laboratory of Atomic Frequency Standards(Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences),Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《波谱学杂志》
CAS
2024年第2期184-190,共7页
Chinese Journal of Magnetic Resonance
基金
国家重点研发计划(2023YFC2205402)。
关键词
铷原子钟
频率漂移
漂移补偿
自主守时
rubidium atomic clock
frequency drift
frequency drift compensation
autonomous punctual timing
