不同时长北斗基线精度差异分析

Analysis on the Difference of Accuracy of Beidou Baseline at Different Duration

北斗导航系统已经可以为亚太地区提供导航服务,其中精度的测试和评估是目前研究的热点。本文以4个连续观测站的观测数据为基础,进行了不同时长静态基线解算,并与精确定位结果进行比较,发现静态解算精度优于3 cm,E、U、V三个方向的向量精度随着基线观测时长的增加而提高。同时进行北斗动态单历元基线解算,与精确定位结果相比,计算发现北斗单历元动态基线解算精度优于0.2 m,并且E、U、V三个方向的向量精度随着基线观测时间的长度增加而提高,有趋于稳定的趋势。比较结果表明,北斗系统具有良好的稳定性,监测时间越长,定位精度越高。

The Beidou navigation system has been able to provide navigation services for the Asia-Pacific region.Accuracy testing and evaluation are currently hot topics.Based on the observation data of four continuous observationstations,this paper carries out static baseline calculations of different durations and compares them with accurate-point positioning results.It is found that the static solution accuracy is better than 3 cm,and the vector accuracy in three directions of E,U and V is Increased with the increase in baseline observation duration.At the same time,the Beidou dynamic single epoch baseline solution was compared with the accurate point positioning results.It was found that the accuracy of the Beidou single epoch dynamic baseline solution was better than 0.2 m,and the vector accuracy in the three directions of E,U,and V along with the baseline The length of observation time increases and increases,and tends to be stable.The comparison results show that the Beidou system has good stability,the longer the monitoring time,the higher the positioning accuracy.