中文摘要：

引入蒙特卡罗方法对GNSS导航平台数据处理的可靠性精度因子指标进行评价，利用内外可靠性指标对整体可靠性进行评价。结果表明：单独GPS系统和GLONASS系统的精度因子和内外可靠性较差。加入Galileo系统可以改善几何分布结构，使平面精度因子和可靠性得到改善的同时，高程精度因子和可靠性得到很大提高。

英文摘要：

To evaluate the reliability of GNSS navigation platform data processing, their internal and external reliability indices are discussed, and the simulation with Monte Carlo method is used to assess the reliability of dilution of precision. The results show that the dilution of precision, internal-reliability and external-reliability are not high in the individual GPS and GLONASS, but they are obviously improved in the combination of the two systems, even the reliability of elevation is not good enough yet. When Galileo＇ s is introduced, the geometry, the horizontal dilution of precision（HDOP） and its reliability are improved, as well as, the vertical dilution of precision（VDOP） and its reliability are greatly improved.