全球定位系统2025，Vol.50Issue(3)：48-60,13.DOI:10.12265/j.gnss.2025020
GNSS卫星钟长期性能与稳定性分析
Long-term performance and stability analysis of GNSS satellite clocks
摘要
Abstract
As the core component of a navigation system,the stability of satellite clocks plays a crucial role in the positioning,navigation,and timing accuracy of GNSS systems.To comprehensively analyze the long-term performance and stability of satellite clocks in four major GNSS systems,a series of methods were employed,including median analysis,clock deviation fitting models,and Hadamard variance method.After preprocessing the precise clock offset products provided by iGMAS,a comparative analysis of the performance of satellite clocks across different GNSS systems was conducted.The results show that the hydrogen masers in BDS-3 and Galileo exhibit high stability,with stable data trends,few interruptions,and a stability level at the 10-14 magnitude for the millisecond scale and 10-15 for the microsecond scale.The rubidium clocks of BDS-3 and the GPS system perform slightly worse,with some data jumps and interruptions.The millisecond stability of BDS-3 rubidium clocks is at the 10-14 level,while GPS satellite clocks demonstrate millisecond stability at the 10-13 level,with both systems achieving 10-14 stability at the microsecond scale.GLONASS satellite clocks exhibit poor data continuity,with significant jump phenomena,and both the millisecond and microsecond stability are at the 10-13 level,showing the overall worst performance.关键词
GNSS/星载原子钟/时频特性/Hadamard总方差/稳定度分析Key words
GNSS/spaceborne atomic clock/time-frequency characteristics/Hadamard total variance/stability analysis分类
天文与地球科学引用本文复制引用
朱麟丰,王中元,胡超..GNSS卫星钟长期性能与稳定性分析[J].全球定位系统,2025,50(3):48-60,13.基金项目
国家自然科学基金(42404015) （42404015）
