关于GNSS时钟产品中的异常值的研究
Kamil Maciuk1, Inese Varna2, Karolina Krzykowska-Piotrowska3
1Department of Integrated Geodesy and Cartography, AGH University, Mickiewicza 30 Ave, 30-059 Kraków, Poland.
Sensors (Basel, Switzerland)
|February 10, 2024
概括
2014-2021年全球导航卫星系统 (GNSS) 的时钟校正显示,GPS和GLONASS提供了最稳定的卫星时钟校正,而利略和北斗则显示出更高的异常率.
科学领域:
- 地质测量和地质数学
- 卫星导航系统 卫星导航系统
- 精确定位技术 精确定位技术
背景情况:
- 准确的计时对于高精度的全球导航卫星系统 (GNSS) 定位至关重要.
- 卫星时钟的校正对于达到厘米级准确度至关重要.
研究的目的:
- 分析2014年至2021年四个GNSS系统 (GPS,GLONASS,Galileo,BeiDou) 卫星时钟校正的最长可用的数据集.
- 评估每个系统的卫星时钟校正的质量,可用性,稳定性和特性.
- 识别和量化钟表产品中的异常值,并评估长期钟表稳定性.
主要方法:
- 对跨越2014-2021年的卫星时钟校正数据的分析.
- 在钟表产品中确定异常值的数量和大小.
- 评估信号可用性,时钟稳定性和特征波形分析.
- 在GPS,GLONASS,利略和北斗系统中进行比较研究.
主要成果:
- GPS和GLONASS展示了最一致和最稳定的卫星时钟校正.
- 利略显示出偏远观测的最高百分比,其次是 BeiDou.
- 较新的系统 (利略, BeiDou) 在研究期间的前几年 (2014-2018) 的数据可用性有限.
- 阶段和频率图显示了跨系统的大量偏离观测.
结论:
- GPS和GLONASS为精确的GNSS定位提供了卓越的时钟校正稳定性.
- 利略和 BeiDou 需要进一步调查时钟校正可靠性和数据可用性.
- 了解时钟校正特性对于优化GNSS性能和准确性至关重要.
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