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分析北斗卫星导航系统的组成结构,就系统在中国大陆区域内卫星的可见性、DOP值和定位精度进行仿真分析。借鉴SBAS完备性算法的原理分析在中国大陆区域内北斗卫星导航系统所能提供的XPL性能指标。表明在单频条件下,中国大陆区域内仿真的Compass系统能满足APV-Ⅰ飞行阶段的完备性要求。 更多还原

【Abstract】 Structure of the Compass is analyzed.Then the system′s visibility,DOP value and position accuracy in China mainland are simulated and analyzed.According to the features of the system′s constellation and referring the principle of space-based augmentation system′s integrity algorithm,the XPL value which the system can provide in China mainland is analyzed.The conclusion shows that the Compass can provide the integrity of APV-Ⅰin China mainland under a single frequency. 更多还原