Galileo and GLONASS group delay variations
Galileo and GLONASS group delay variations
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DOI：
10.1007/s10291-019-0939-7
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发表时间：
2019-12
期刊：
影响因子：
4.9
通讯作者：
S. Beer;L. Wanninger;A. Hesselbarth
中科院分区：
文献类型：
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作者：
S. Beer;L. Wanninger;A. Hesselbarth
与相位测量的天线相位中心校正类似，卫星和接收GNSS天线的群延迟变化（GDV）影响码伪距测量。它们与频率有关，并随信号发射和接收的方向而变化。我们提出了第一GDV估计所有五个伽利略和三个GLONASS频段的地面观测的基础上。与全球定位系统相比，伽利略和全球轨道导航卫星系统的轨道特性简化了这种方法，因为单个基准站可以在一个轨道重复周期内在整个仰角范围内观测每个伽利略和全球轨道导航卫星系统卫星。相同卫星类型的三个接收器天线模型的同质结果和与GPS块IIF的比较表明，主要是接收器天线特定的GDV。根据接收器天线类型的不同，伽利略和全球轨道导航卫星系统E1和G1频带的峰-峰值分别为35厘米和28厘米。我们展示了它们对线性组合的影响，其中代码可观测值用于精确的应用，并通过改进单频精确点定位中的高度分量来验证我们的GDV估计。
Similar to the antenna phase center corrections for phase measurements, group delay variations (GDV) of satellite and receiving GNSS antennas affect code pseudorange measurements. They are frequency-dependent and vary with the direction of signal transmission and reception. We present the first GDV estimates for all five Galileo and three GLONASS frequency bands based on terrestrial observations. As compared to GPS, the orbit properties of Galileo and GLONASS simplify this approach, because a single reference station can observe each Galileo and GLONASS satellite in its entire elevation angle range during one orbit repeat period. The homogenous results of three receiver antenna models for identical satellite types and a comparison to GPS Block IIF indicate mainly receiver antenna-specific GDV. They amount to 35 and 28 cm peak-to-peak for Galileo and GLONASS frequency bands E1 and G1, respectively, depending on the receiver antenna type. We show their effect on linear combinations where the code observable is used for precise applications and validate our GDV estimations by improving the height component in single-frequency precise point positioning.