GPS Galileo BDS3 LEO未校准的相位延迟估计和紧密结合精确的点定位与模两可的解决方案
Jing Fang1,2, Rui Tu3, Pengfei Zhang4
1National time service center, Chinese Academy of Sciences, Shu Yuan Road, Xi'an, 710600, China.
Scientific reports
|July 2, 2025
概括
将低地球轨道 (LEO) 卫星添加到多系统精确定位 (PPP) 中,可显著提高准确性. 这项研究表明,定位性能有所改善,与LEO集成的融合速度更快,特别是在模糊性解决方面.
科学领域:
- 地质测量和卫星导航
- 地质物理学 地质物理学
- 太空科学 太空科学
背景情况:
- 多系统精确点定位 (PPP) 通过增加卫星可见性和改进的几何学来获益.
- 低地球轨道 (LEO) 卫星提供快速运动和低高度,可能提高PPP准确性.
研究的目的:
- 评估将LEO卫星集成到多系统PPP中的影响,并提供模糊性解决 (AR).
- 从GPS,Galileo,BDS-3和LEO系统中评估宽车道 (WL) 和窄车道 (NL) 未校准的相延迟 (UPD) 的稳定性和质量.
主要方法:
- 对多个卫星导航系统进行模拟的LEO观测和估计的WL/NL UPD.
- 在高,中,低度执行多系统紧密组合PPP和PPP-AR.
- 分析了UPD的稳定性,并评估了定位性能改进.
主要成果:
- WL UPDs在10天内表现出稳定性 (>97%的残留量<0.25周期).
- 在1天内,NL UPDs显示稳定 (>86%残留<0.25周期),这表明PPP-AR的质量良好.
- 在所有度上改善了AR定位性能;多系统PPP加速了融合,增加了AR成功率.
结论:
- 低空卫星集成显著提高了多系统PPP的准确性和融合.
- 估计的UPD的质量支持在PPP-AR.中使用它们.
- 多系统紧密组合PPP与LEO增强为定位性能提供了显著的改进.
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