Modeling and assessment of combined GPS/GLONASS precise point positioning
Modeling and assessment of combined GPS/GLONASS precise point positioning
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GPS/GLONASS组合精密单点定位建模与评估
DOI：
10.1007/s10291-012-0273-9
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发表时间：
2013-04-01
期刊：
影响因子：
4.9
通讯作者：
Gao, Yang
中科院分区：
文献类型：
--
作者：
Cai, Changsheng;Gao, Yang
全球定位系统和全球轨道导航卫星系统观测相结合可提高精确单点定位的可靠性、可用性和准确性。我们提出并分析了一个组合GPS/GLONASS PPP模型，包括功能和随机组件。对仅基于GPS或GLONASS观测的PPP进行了数值比较和分析，以证明GPS/GLONASS组合PPP的好处。为了更好地对不同导航系统的观测值进行随机建模，对观测残差进行了分析。还利用不同的精密轨道和时钟产品进行了分析。使用静态和动态数据评估了GPS/GLONASS组合PPP的性能。结果表明，GLONASS数据的加入，可以显着减少收敛时间。然而，如果有足够数量的具有良好几何形状的全球定位系统卫星，则添加全球轨道导航卫星系统数据不会显著提高定位精度。
A combination of GPS and GLONASS observations can offer improved reliability, availability and accuracy for precise point positioning (PPP). We present and analyze a combined GPS/GLONASS PPP model, including both functional and stochastic components. Numerical comparison and analysis are conducted with respect to PPP based on only GPS or GLONASS observations to demonstrate the benefits of the combined GPS/GLONASS PPP. The observation residuals are analyzed for more appropriate stochastic modeling for observations from different navigation systems. An analysis is also made using different precise orbit and clock products. The performance of the combined GPS/GLONASS PPP is assessed using both static and kinematic data. The results indicate that the convergence time can be significantly reduced with the addition of GLONASS data. The positioning accuracy, however, is not significantly improved by adding GLONASS data if there is a sufficient number of GPS satellites with good geometry.