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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Galileo L10 Satellites: Orbit Clock and Signal-in-Space Performance Analysis
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Galileo L10 Satellites: Orbit Clock and Signal-in-Space Performance Analysis

机译：伽利略L10卫星：轨道时钟和空间信号性能分析

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摘要

The tenth launch (L10) of the European Global Navigation Satellite System Galileo filled in all orbital slots in the constellation. The launch carried four Galileo satellites and took place in July 2018. The satellites were declared operational in February 2019. In this study, we report on the performance of the Galileo L10 satellites in terms of orbital inclination and repeat period parameters, broadcast satellite clocks and signal in space (SiS) performance indicators. We used all available broadcast navigation data from the IGS consolidated navigation files. These satellites have not been reported in the previous studies. First, the orbital inclination (56.7±0.15°) and repeat period (50680.7±0.22 s) for all four satellites are within the nominal values. The data analysis reveals also 13.5-, 27-, 177- and 354-days periodic signals. Second, the broadcast satellite clocks show different correction magnitude due to different trends in the bias component. One clock switch and several other minor correction jumps have occurred since the satellites were declared operational. Short-term discontinuities are within ±1 ps/s, whereas clock accuracy values are constantly below 0.20 m (root-mean-square—rms). Finally, the SiS performance has been very high in terms of availability and accuracy. Monthly SiS availability has been constantly above the target value of 87% and much higher in 2020 as compared to 2019. Monthly SiS accuracy has been below 0.20 m (95th percentile) and below 0.40 m (99th percentile). The performance figures depend on the content and quality of the consolidated navigation files as well as the precise reference products. Nevertheless, these levels of accuracy are well below the 7 m threshold (95th percentile) specified in the Galileo service definition document.
机译：欧洲全球导航卫星系统伽利略的第十推出（L10）填充了星座中的所有轨道插槽。该发射携带四颗伽利略卫星，并于2018年7月举行。卫星在2019年2月宣布进行运营。在本研究中，我们在轨道倾角和重复期参数方面报告了伽利略L10卫星的表现，广播卫星时钟和播放卫星时钟空间中的信号（SIS）性能指标。我们使用来自IGS统一导航文件的所有可用广播导航数据。这些卫星尚未在以前的研究中报告。首先，所有四颗卫星的轨道倾斜度（56.7±0.15°）和重复期（50680.7±0.22秒）在标称值内。数据分析还揭示了13.5，27-，177-和354天的周期性信号。其次，广播卫星时钟由于偏置分量的不同趋势而显示出不同的校正幅度。自卫星被宣布运行以来，发生了一个时钟开关和其他几个小校正跳跃。短期不连续性在±1 ps / s之内，而时钟精度值常在低于0.20米（根均值方形RMS）。最后，在可用性和准确性方面，SIS性能非常高。与2019年，每月SIS可用性在2020年的目标值超过87％，高得多。每月SIS精度低于0.20米（95百分位数）和低于0.40米（第99百分点）。性能数据依赖于整合导航文件的内容和质量以及精确的参考产品。然而，这些精度水平远低于伽利略服务定义文件中规定的7米阈值（第95百分位数）。

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