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用于量化时间转移系统延迟的衰老的统计数据
T E Parker1, R C Brown1, J A Sherman1
1National Institute of Standards and Technology, Boulder, CO, United States of America.
概括
像TWSTFT和GPSCP这样的时间传输系统的老化可以比TDEV或ADEVS表示的大四倍以上. 这项研究建议使用ADEVS来更好地估计衰老,因为它对时间推移的敏感性很高.
科学领域:
- 计量学 计量学 计量学
- 时间和频率的转移时间和频率.
- 卫星导航系统 卫星导航系统
背景情况:
- 时间转移系统 (例如,TWSTFT,GPSCP) 的剩余时间延迟表现出被称为老化或时间分散的时间变化.
- 双重区分的TWSTFT和GPSCP数据揭示了相对时间延迟的变化,提供了对系统衰老的见解.
研究的目的:
- 开发和介绍分析和蒙特卡洛方法来估计时间转移系统中的时间分散 (老化).
- 为了比较时间偏差 (TDEV) 和艾伦偏差 (ADEVS) 的变异在表征衰老中的有效性.
主要方法:
- 利用分析技术来建模时间转移系统的衰老.
- 使用蒙特卡洛模拟来估计TDEV和ADEVS统计数据的衰老.
- 分析了TDEV和ADEVS对时间漂移和衰老特征的敏感性.
主要成果:
- 时间转移系统的老化可能被严重低估,超过TDEV或ADEVS值超过四倍.
- 与TDEV相比,ADEVS对时间推移的敏感性更高,因此它更适合用于衰老分析.
结论:
- 该研究强调,当仅依赖TDEV或ADEVS时,可能会低估时间传输系统的老化.
- 建议使用ADEVS来更准确地评估衰老,因为它对时间推移的敏感性更强.
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