Broadcast versus precise ephemerides: a multi-GNSS perspective
Broadcast versus precise ephemerides: a multi-GNSS perspective
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DOI：
10.1007/s10291-014-0390-8
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发表时间：
2015-04-01
期刊：
影响因子：
4.9
通讯作者：
Hauschild, Andre
中科院分区：
文献类型：
--
作者：
Montenbruck, Oliver;Steigenberger, Peter;Hauschild, Andre
一致的信号在空间的测距误差（SISRE）的分析，目前所有的卫星导航系统，考虑全球平均值和最坏的用户位置统计。分析依据的是用近全球接收器网络收集的全球定位系统、全球轨道导航卫星系统、伽利略、北斗和准天顶卫星系统一年的广播星历信息。将从导航数据中得出的位置和时钟值与全球导航卫星系统国际服务组织及其多重全球导航卫星系统实验提供的精确轨道和时钟产品进行比较。卫星激光测距测量被用于对仅在轨道上运行的SISRE的贡献进行补充和独立评估。适当考虑天线偏移的必要性突出和块/星座特定的径向天线偏移值的广播轨道的质心校正。同样，差分码偏置的广播和精确的时钟产品的比较中的应用的需要被强调。对于GPS，传统的导航信息的分析是由CNAV消息性能的讨论的基础上的第一个CNAV测试活动在2013年6月的补充。在2013/2014年的12个月期间，单个星座的全球平均SISRE值为0.7 +/- A 0.02米（GPS），1.5 +/- A 0.1米（北斗），1.6 +/- A 0.3米（伽利略），1.9 +/- A 0.1米（格洛纳斯）和0.6 +/- A 0.2米（QZSS）。
A consistent analysis of signal-in-space ranging errors (SISREs) is presented for all current satellite navigation systems, considering both global average values and worst-user-location statistics. The analysis is based on 1 year of broadcast ephemeris messages of the Global Positioning System (GPS), GLONASS, Galileo, BeiDou and QZSS collected with a near-global receiver network. Position and clock values derived from the navigation data are compared against precise orbit and clock products provided by the International GNSS Service and its multi-GNSS experiment. Satellite laser ranging measurements are used for a complementary and independent assessment of the orbit-only SISRE contribution. The need for proper consideration of antenna offsets is highlighted and block-/constellation-specific radial antenna offset values for the center-of-mass correction of broadcast orbits are derived. Likewise, the need for application of differential code biases in the comparison of broadcast and precise clock products is emphasized. For GPS, the analysis of the legacy navigation message is complemented by a discussion of the CNAV message performance based on the first CNAV test campaign in June 2013. Global average SISRE values for the individual constellations amount to 0.7 +/- A 0.02 m (GPS), 1.5 +/- A 0.1 m (BeiDou), 1.6 +/- A 0.3 m (Galileo), 1.9 +/- A 0.1 m (GLONASS), and 0.6 +/- A 0.2 m (QZSS) over a 12-month period in 2013/2014.