北斗精密定轨及广播星历轨道精度评估

发布时间：2018-01-06 14:38

本文关键词：北斗精密定轨及广播星历轨道精度评估　出处：《测绘工程》2016年11期 　论文类型：期刊论文

【摘要】：目前各类用户对基于北斗卫星导航定位服务需求在不断扩大,由于广播星历实时、易获取,北斗广播星历精度是实时导航定位用户关心的问题,也是检验系统是否达成设计指标的关键因素。文中基于国家基准站和MGEX站计算北斗精密轨道,重复弧段精度优于利用国际站计算结果。将计算的北斗精密轨道作为参考,更加准确地评估分析北斗广播星历轨道误差的精度。分析结果显示,北斗广播星历轨道径向精度优于法向和切向精度,且法向误差具有较为明显的周期性。各类卫星中,GEO卫星精度稍差,而IGSO和MEO卫星与GPS在同一量级。随着北斗卫星系统逐步组网完善,地面监测站分布趋于合理,北斗系统整体性能将会不断提高。
[Abstract]:At present, the demand of various users for navigation and positioning services based on Beidou satellite is expanding. Because broadcast ephemeris is real-time, easy to obtain, the accuracy of Beidou broadcast ephemeris is a concern of real-time navigation and positioning users. It is also the key factor to test whether the system can reach the design target. This paper calculates the Beidou precision orbit based on the national reference station and MGEX station. The precision of repeated arc section is better than that of the international station. The calculated Beidou precise orbit is used as a reference to evaluate and analyze the accuracy of Beidou broadcast ephemeris orbit error more accurately. The analysis results show that. The radial accuracy of Beidou broadcast ephemeris is better than that of normal and tangential, and the normal error is obviously periodic. The IGSO and MEO satellites are of the same order of magnitude as GPS. With the gradual improvement of the Beidou satellite system, the distribution of ground monitoring stations tends to be reasonable, and the overall performance of the Beidou satellite system will be continuously improved.
【作者单位】：武汉大学测绘学院;国家基础地理信息中心;导航与位置服务国家测绘地理信息局重点实验室;
【基金】：国家测绘地理信息局基础测绘科技项目(15-JC-C01-5);国家测绘地理信息局公益性科研专项(201512004) 国家863科技计划(2014AA123104)
【分类号】：P228
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