Galileo orbit and clock quality of the IGS Multi-GNSS Experiment
Galileo orbit and clock quality of the IGS Multi-GNSS Experiment
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DOI：
10.1016/j.asr.2014.06.030
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发表时间：
2015-01-01
影响因子：
2.6
通讯作者：
Montenbruck, Oliver
中科院分区：
文献类型：
--
作者：
Steigenberger, Peter;Hugentobler, Urs;Montenbruck, Oliver
国际全球导航卫星系统服务（IGS）的多全球导航卫星系统实验（MGEX）旨在收集和分析所有可用卫星导航系统的数据。新的全球和区域卫星导航系统尤其令人感兴趣，即欧洲伽利略系统、中国北斗系统、日本QZSS以及卫星增强系统。本文分析了四个 MGEX 分析中心的伽利略产品在 20 周的共同时间段内的轨道和时钟质量。各个分析中心的轨道比较在5-30厘米水平上具有一致性。日边界不连续性范围为 4 至 28 厘米，而 2 天轨道拟合 RMS 值范围为 1 至 7 厘米。卫星激光测距残差评估的精度为一分米水平，所有分析中心的系统偏差约为-5厘米。此外，所有轨道产品中都存在与太阳辐射压力错误建模相关的分米级系统误差。由于径向轨道误差与时钟参数的相关性，这些误差也可以在轨道频率下的伽利略卫星时钟的艾伦偏差中看到。 (C) 2014 年 COSPAR。由爱思唯尔有限公司出版。保留所有权利。
The Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS) aims at the data collection and analysis of all available satellite navigation systems. In particular the new global and regional satellite navigation systems are of interest, i.e., the European Galileo, the Chinese BeiDou, the Japanese QZSS as well as satellite based augmentation systems. This article analyzes the orbit and clock quality of the Galileo products of four MGEX analysis centers for a common time period of 20 weeks. Orbit comparisons of the individual analysis centers have a consistency at the 5-30 cm level. Day boundary discontinuities range from 4 to 28 cm whereas 2-day orbit fit RMS values vary between 1 and 7 cm. The accuracy evaluated by satellite laser ranging residuals is on the one decimeter level with a systematic bias of about -5 cm for all analysis centers. In addition, systematic errors on the decimeter level related to solar radiation pressure mismodeling are present in all orbit products. Due to the correlation of radial orbit errors with the clock parameters, these errors are also visible as a bump in the Allan deviation of the Galileo satellite clocks at the orbital frequency. (C) 2014 COSPAR. Published by Elsevier Ltd. All rights reserved.