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Estimation of satellite position, clock and phase bias corrections

机译：估计卫星位置，时钟和相位偏差校正

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摘要

Precise point positioning with integer ambiguity resolution requires precise knowledge of satellite position, clock and phase bias corrections. In this paper, a method for the estimation of these parameters with a global network of reference stations is presented. The method processes uncombined and undifferenced measurements of an arbitrary number of frequencies such that the obtained satellite position, clock and bias corrections can be used for any type of differenced and/or combined measurements. We perform a clustering of reference stations. The clustering enables a common satellite visibility within each cluster and an efficient fixing of the double difference ambiguities within each cluster. Additionally, the double difference ambiguities between the reference stations of different clusters are fixed. We use an integer decorrelation for ambiguity fixing in dense global networks. The performance of the proposed method is analysed with both simulated Galileo measurements on E1 and E5a and real GPS measurements of the IGS network. We defined 16 clusters and obtained satellite position, clock and phase bias corrections with a precision of better than 2 cm.
机译：具有整数模糊度分辨率的精确点定位需要精确了解卫星位置，时钟和相位偏差校正。本文提出了一种利用参考站的全球网络估算这些参数的方法。该方法处理任意数量的频率的未组合和无差异的测量，使得获得的卫星位置，时钟和偏差校正可用于任何类型的差分和/或组合的测量。我们对参考站进行聚类。群集使每个群集内的卫星可见性相同，并且可以有效修复每个群集内的双差模糊度。另外，不同聚类的参考站之间的双差歧义是固定的。我们使用整数解相关来解决密集的全局网络中的歧义。通过在E1和E5a上模拟的伽利略测量以及IGS网络的真实GPS测量，分析了该方法的性能。我们定义了16个星团，并获得了优于2 cm的精度的卫星位置，时钟和相位偏差校正。

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