基于精密产品的伪距单点定位研究及应用

发布时间：2019-03-04 17:34

【摘要】：针对单频接收机用户,本文就精密轨道、精密卫星钟差、精密电离层格网产品给出了基于精密产品的伪距单点定位算法。采用IGS预报的精密产品对10测站进行100天伪距单点定位解算。着重分析了GPS定位结果,验证了算法的正确性,并与广播星历就卫星轨道误差、卫星钟差、电离层延迟做了详细对比。实验结果证明:卫星精密轨道和钟差的自洽特性影响单点定位解;电离层延迟对伪距单点定位影响明显大于卫星轨道、钟差误差;超快速预报精密星历可以较广播星历得到更高精度的单点定位解。基于精密产品的伪距单点定位研究表明:预报精密星历在水平、高程方向平均改进约0.5m,快速精密电离层产品在水平、高程方向平均改进约1.1m.
[Abstract]:For the users of single-frequency receiver, this paper presents a pseudo-range single-point positioning algorithm based on precision products for precise orbit, precision satellite clock error and precision ionospheric grid products. A 100-day pseudo-range single-point positioning solution for 10 stations is carried out with the precision product of IGS prediction. The GPS positioning results are emphatically analyzed, and the correctness of the algorithm is verified. The satellite orbit error, satellite clock error and ionospheric delay are compared with the broadcast ephemeris in detail. The experimental results show that the self-consistent characteristics of satellite precise orbit and clock error affect the single-point positioning solution, and the effect of ionospheric delay on pseudo-range single-point positioning is obviously greater than that of satellite orbit and clock error. Ultra-fast prediction of precise ephemeris can obtain a more accurate single-point positioning solution than broadcast ephemeris. The research of pseudo-range single point positioning based on precision products shows that the prediction precision ephemeris is horizontal, the elevation direction is improved about 0.5m, the fast precision ionospheric product is horizontal, and the elevation direction is improved about 1.1m on average.
【作者单位】：信息工程大学导航与空天目标工程学院;北斗导航应用技术协同创新中心;61206部队;
【分类号】：P228.4

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