Alonso María Teresa, Sanz Jaume, Juan José Miguel, Rovira García Adrià, Casado Guillermo González
Research Group of Astronomy and Geomatics (gAGE), Universitat Politècnica de Catalunya (UPC), 08034 Barcelona, Spain.
Sensors (Basel). 2020 Nov 29;20(23):6832. doi: 10.3390/s20236832.
A preliminary analysis of Galileo F/NAV broadcast Clock and Ephemeris is performed in this paper with 43 months of data. Using consolidated Galileo Receiver Independent Exchange (RINEX) navigation files, automated navigation data monitoring is applied from 1 January 2017 to 31 July 2020 to detect and verify potential faults in the satellite broadcast navigation data. Based on these observation results, the Galileo Signal-in-Space is assessed, and the probability of satellite failure is estimated. The Galileo nominal ranging accuracy is also characterized. Results for GPS satellites are included in the paper to compare Galileo performances with a consolidated constellation. Although this study is limited by the short observation period available, the analysis over the last three-year window shows promising results with Psat = 3.2 × 10/sat, which is below the value of 1 × 10 stated by the Galileo commitments.
本文利用43个月的数据对伽利略F/NAV广播时钟和星历进行了初步分析。使用合并的伽利略接收机独立交换（RINEX）导航文件，在2017年1月1日至2020年7月31日期间进行自动导航数据监测，以检测和验证卫星广播导航数据中的潜在故障。基于这些观测结果，对伽利略空间信号进行评估，并估计卫星故障概率。还对伽利略标称测距精度进行了表征。论文中包含了GPS卫星的结果，以便将伽利略的性能与一个合并星座进行比较。尽管本研究受到可用观测期较短的限制，但过去三年窗口的分析显示出了有前景的结果，Psat = 3.2 × 10/卫星，低于伽利略承诺声明的1 × 10的值。
