摘要
论述了GPS监测站伪距观测量评定广播星历精度的基本方法。同时,分析并计算得出:利用GPS监测站载波相位观测量平滑伪距能明显提高伪距观测量评定广播星历的精度。采用2004年7月19日拉萨站伪距观测量对IGS提供的广播星历的精度进行了评定,实验结果表明,广播星历提供的卫星轨道精度从总体上达到3m左右。
This paper discusses the essential method of using GPS pseudorange data to assess the precision of broadcast ephemeris. At the same time, it also concludes by analyzing and calculating： it can obviously improve the precision of GPS pseudorange data by using GPS carrier phase to smooth pseudorange. In this paper, it uses the data observed on July 19,2004 to assess the precision of broadcast ephemeris which is provided by IGS. Based on the pseudorange residual analysis, it is found that the accuracy of broadcast ephemeris＇ precision is 3 m or so.
出处
《海洋测绘》
2007年第3期5-8,共4页
Hydrographic Surveying and Charting
关键词
全球定位系统
伪距观测量
广播星历
精度
global positioning system
pseudorange data
broadcast ephemeris
precision
