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Comparison of GPS receiver DCB estimation methods using a GPS network

机译：使用GPS网络比较GPS接收机DCB估计方法

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摘要

Two approaches for receiver differential code biases (DCB) estimation using the GPS data obtained from the Korean GPS network (KGN) in South Korea are suggested: the relative and single (absolute) methods. The relative method uses a GPS network, while the single method determines DCBs from a single station only. Their performance was assessed by comparing the receiver DCB values obtained from the relative method with those estimated by the single method. The daily averaged receiver DCBs obtained from the two different approaches showed good agreement for 7 days. The root mean square (RMS) value of those differences is 0.83 nanoseconds (ns). The standard deviation of the receiver DCBs estimated by the relative method was smaller than that of the single method. From these results, it is clear that the relative method can obtain more stable receiver DCBs compared with the single method over a short-term period. Additionally, the comparison between the receiver DCBs obtained by the Korea Astronomy and Space Science Institute (KASI) and those of the IGS Global Ionosphere Maps (GIM) showed a good agreement at 0.3 ns. As the accuracy of DCB values significantly affects the accuracy of ionospheric total electron content (TEC), more studies are needed to ensure the reliability and stability of the estimated receiver DCBs.
机译：提出了两种使用从韩国的韩国GPS网络（KGN）获得的GPS数据来估计接收机差分代码偏差（DCB）的方法：相对方法和单一方法（绝对方法）。相对方法使用GPS网络，而单一方法仅从单个站点确定DCB。通过比较从相对方法获得的接收器DCB值与通过单一方法估算的接收器DCB值，评估了它们的性能。从两种不同方法获得的每日平均接收器DCB在7天中显示出良好的一致性。这些差异的均方根（RMS）值为0.83纳秒（ns）。通过相关方法估计的接收器DCB的标准偏差小于单一方法的标准偏差。从这些结果可以明显看出，相对于单一方法，相对方法在短期内可以获得更稳定的接收器DCB。此外，韩国天文学和空间科学研究所（KASI）获得的接收器DCB与IGS全球电离层地图（GIM）的接收器DCB之间的比较显示出0.3 ns的良好一致性。由于DCB值的准确性会严重影响电离层总电子含量（TEC）的准确性，因此需要进行更多研究以确保估计的接收器DCB的可靠性和稳定性。

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