An increasing number of satellites of global navigation satellite systems (GNSS) and their constant modernization allow improving positioning accuracy and e'/> Quality assessment of multi-GNSS orbits and clocks for real-time precise point positioning
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Quality assessment of multi-GNSS orbits and clocks for real-time precise point positioning

机译：用于实时精确点定位的多GNSS轨道和时钟的质量评估

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AbstractAn increasing number of satellites of global navigation satellite systems (GNSS) and their constant modernization allow improving positioning accuracy and enable performing the GNSS measurements in challenging environments. Since 2016, the Centre National d’études Spatiales (CNES) has been providing real-time corrections for all GNSS and thus allows for the actual multi-GNSS precise point positioning in real time without any issues associated with the latency of orbit and clock products as in the case of the IGS final products. We provide a comprehensive evaluation of the availability and the quality of multi-GNSS real-time orbit and clock products through the comparison to the final Center for Orbit Determination in Europe (CODE) orbits, fitting long continuous orbital arcs, analyzing the orbit position differences with respect to satellite laser ranging observations, as well as the assessment of clock stability using modified Allan deviation diagrams. The 3D orbit RMS over a 1-month test period, when compared to CODE products, is 5, 10, 18, 18 and 36?cm for GPS, GLONASS, Galileo, BeiDou MEO and BeiDou IGSO, respectively. The error of BeiDou geostationary orbits is above the 1-m level. Finally, we found that the quality of orbits and clocks is a function of the satellite system, orbital plane and the elevation of the Sun above the orbital plane, the satellite altitude, as well as the satellite block and generation.
机译：<标题>抽象 ara id =“par4”>越来越多的全球导航卫星系统（GNSS）的卫星数量及其恒定的现代化允许提高定位精度，并使GNSS测量能够在充满挑战的环境中执行GNSS测量。自2016年以来，该中心国家D'études空间（CNES）一直为所有GNS提供实时校正，因此允许实际的多GNSS实时定位，而无需与轨道和时钟产品的延迟相关的任何问题如IGS最终产品的情况。我们通过与欧洲（代码）轨道的最终轨道测定中心的比较来提供对多GNSS实时轨道和时钟产品的可用性和质量的全面评估，拟合长期连续轨道弧，分析轨道位置差异关于卫星激光测距观察，以及使用改进的Allan偏差图对时钟稳定性的评估。 3D轨道RMS在1个月的测试期间，与代码产品相比，分别为GPS，Glonass，Galileo，Beidou Meo和Beidou Igso的5,10,18,18和36厘米。北斗地球静止轨道的错误高于1米。最后，我们发现轨道和时钟的质量是卫星系统，轨道平面和轨道平面上方的太阳升高，卫星高度以及卫星块和一代的函数。

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