中文摘要：

对北斗观测值进行了质量分析,包括观测值的信噪比、多路径和解算的单差残差时间序列随高度角的变化情况。北斗载波相位单差残差随高度角的统计可为高度角加权和信噪比加权进行模型精化,从而获得适合北斗卫星载波观测的随机模型。实验分析表明,北斗系统的观测值质量要稍优于GPS观测值质量,尤其是在卫星高度角较小时表现明显。同时北斗观测值的残差分析为北斗定位中随机模型的建立提供依据。

英文摘要：

This paper analyzes the Compass observations through the zero baseline experi- ments, including the time series of signal to noise ratio（SNR）,multipath and the Compass single-difference residuals,which change with the elevation angles. Compared with GPS ob- servations,the Compass signals have some differences. For example, GPS L1 signal is stron- ger than L2 signal, while the Compass B2 signal is stronger than B1. The Compass carrier phase single-difference residuals changes with the elevation can be used to refinement the ele- vation-weighting method and SNR-weighting method. The experimental results show that the accuracy of Compass observations are reliable, which can be used in high-precision navi- gation and positioning, meanwhile, the quality analysis of the Compass observations can pro- vide the basis for building stochastic model.