BDS-3卫星与其他GNSS系统卫星原子钟性能分析

伏军胜; 贾小林; 刘家龙; 许瑾; 贺延伟; 张奋

doi:10.3969/j.issn.1006-7086.2022.05.017

BDS-3卫星与其他GNSS系统卫星原子钟性能分析

Performance Evaluation and Comparison between Spaceborne Atomic Clocks of BDS-3 Satellites and Other GNSS Systems

摘要

摘要: 星载原子钟是决定星上时间基准的基础。利用一年的事后精密钟差数据，对北斗三号（BDS-3）和其他全球卫星导航系统的准确度、漂移率和稳定度进行了分析，以评估全球卫星导航系统（GNSS）在轨原子钟性能。结果表明：BDS-3的铷原子钟准确度在2.62×10^-13~2.54×10^-11之间，氢原子钟在1.64×10^-14~6.77×10^-11之间；BDS-3氢原子钟的漂移率显著优于铷原子钟；BDS-3多数氢原子钟的稳定度可达到10^-15量级。BDS-3的稳定度表现最好，其次是全球定位系统（GPS）、北斗二号（BDS-2）、伽利略（Galileo）和格洛纳斯系统（GLONASS）。

Abstract: The spaceborne atomic clock is the basis for determining the time base of satellite.The Beidou-3 (BDS-3) and other global satellites were analyzed in terms of accuracy,drift and stability using one year’s post-event precise clock error data to evaluate the in-orbit atomic clock of the Global Navigation Satellite System (GNSS). The results show that the accuracy of the rubidium clock of BDS-3 and the hydrogen maser are in the range of 2.62×10^-13~2.54×10^-11and 1.64×10^-14~6.77×10^-11 respectively.The frequency drift of the hydrogen maser of BDS-3 is much better than that of rubidium clocks.In terms of stability,most hydrogen masers of BDS-3 can reach the order of 10^-15.The average frequency stability value of BDS-3 is the best,followed by Global Positioning System (GPS), Beidou-2 (BDS-2), Galileo and GLONASS.

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