【摘要】 通过研究多路径误差的周日重复性特征,将参考站网络多路径历史数据用于减弱参考站网络基线解算中的多路径效应影响,以提高网络解算(尤其指低高度角卫星和新升卫星)的初始化进程及可靠性。通过分析多路径误差的产生机理,研究多路径误差与信噪比信息的强相关关系,建立信噪比相关网络内插模型(SNRIM),用于流动用户位置高精度多路径改正数的实时计算。最后通过四川GPS观测网络实验,验证上述方法在网络高精度实时定位领域应用的有效性及可靠性。更多还原

【Abstract】 Long-term investigation is made on the sidereal dayrepetition characteristic of the multipath effect,which shows that historical data from the reference station network can be used to accelerate the initialization process of the network resolution,by mitigating the multipath effect(especially for the newrisen and low-elevation satellites) of the baselines within the network.Meanwhile a SNR-based interpolation model(SNRIM) is developed to calculate the precise real-time multipath corrections for RTK rover,based on the strong-correlative relationship between the multipath effect and signal-to-noise ratio(SNR). Finally the above technique for multipath mitigation is verified to be feasible and reliable in reference station network based real-time kinematic differential GPS positioning by experimental data acquired from the SGRSN(Sichuan GPS Reference Station Network)更多还原