GPS/GLONASS组合定位时间系统同步偏差

GPS/GLONASS integrated navigation time system sampling synchronous deviation

为研究GPS/GOLNASS组合定位中两个不同时间系统转换到UTC时间系统后存在微小的同步偏差问题,采用方差分量估计的方法解算GPS/GLONASS组合定位系统中不同时间系统的同步偏差,并进行实例计算与分析.研究结果表明:GPS/GLONASS组合定位的精度要优于GPS单系统,GPS与GLONASS的时间系统(各自转换为UTC时间)存在190～270 ns的系统偏差,且使用不同接收机观测的数据进行计算所得到的系统偏差存在一定的差异.

In order to study the synchronous deviation of time system in GPS/GLONASS integrated positioning after two time systems being converted to the UTC, the variance component estimation was used and a practical example is calculated and analyzed. The results show that the GPS/GLONASS integrated positioning is superior to GPS. There is a little deviation at the range of 190ns-270ns between GPS and GLONASS time system after being converted to the UTC. Moreover, the data that obtained by different receiver also contains some deviations.