This paper describes a method to determine global navigation satellite systems (GNSS) satellite orbits and clocks for advanced receiver autonomous integrity monitoring (ARAIM). The orbit and clock estimates will be used as a reference truth to monitor signal-in-space integrity parameters of the ARAIM integrity support message (ISM). Unlike publicly available orbit and clock products, which aim to maximise estimation accuracy, a straightforward and transparent approach is employed to facilitate integrity evaluation. The proposed monitor is comprised of a worldwide network of sparsely distributed reference stations and will employ parametric satellite orbit models. Two separate analyses, covariance analysis and model fidelity evaluation, are carried out to assess the impact of measurement errors and orbit model uncertainty on the estimated orbits and clocks, respectively. The results indicate that a standard deviation of 30 cm can be achieved for the estimated orbit/clock error, which is adequate for ISM validation.

中文翻译：

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用于估计卫星轨道和时钟的高级接收机自主完整性监测 (ARAIM) 地面监测设计

本文介绍了一种确定全球导航卫星系统 (GNSS) 卫星轨道和时钟的方法，用于高级接收机自主完整性监测 (ARAIM)。轨道和时钟估计将用作监测 ARAIM 完整性支持消息 (ISM) 的空间信号完整性参数的参考值。与旨在最大限度地提高估计精度的公开可用的轨道和时钟产品不同，采用一种直接透明的方法来促进完整性评估。提议的监测器由分布稀疏的参考站组成的全球网络组成，并将采用参数化卫星轨道模型。两个独立的分析，协方差分析和模型保真度评估，分别评估测量误差和轨道模型不确定性对估计轨道和时钟的影响。结果表明，估计的轨道/时钟误差可以达到 30 厘米的标准偏差，这足以用于 ISM 验证。