GNSS电离层模型改正精度评估与分析
发布时间：2019-03-20 11:00
【摘要】：电离层时延误差是导航定位信号在空间传播路径上的主要误差源之一,因此全面了解GNSS电离层模型的改正精度具有一定现实意义.根据GPS,BDS和Galileo系统所采用的电离层修正模型,利用2014年电离层校正参数,以高精度全球电离层图为基准,评估分析了三大系统电离层时延的改正精度.结果表明:目前GNSS使用的几种电离层修正模型的改正率在65%~75%左右;Galileo系统使用的第二版NeQuick模型与第一版NeQuick模型相比在修正精度上并无显著提高;GPS使用的Klobuchar 8参数模型在北半球25°一45°N的中纬度地区精度很高,但是在全球其他区域精度较低,分布性较差,而NeQuick模型全球改正率分布则较为平均且平滑.
[Abstract]:Ionospheric delay error is one of the main error sources of navigation and positioning signal in space propagation path, so it is of practical significance to fully understand the correction accuracy of GNSS ionospheric model. According to the ionospheric correction model adopted by GPS,BDS and Galileo systems, the correction accuracy of ionospheric delay of three systems is evaluated and analyzed by using the ionospheric correction parameters in 2014 and using the high-precision global ionospheric map as the benchmark. The results show that the correction rates of several ionospheric correction models used by GNSS are about 65% / 75%, and the correction accuracy of the second edition of NeQuick model used by Galileo system is not significantly higher than that of the first version of NeQuick model. The accuracy of the Klobuchar 8 parameter model used by GPS is very high in the mid latitude region of 25 掳- 45 掳N in the Northern Hemisphere, but in other regions of the world the accuracy is lower and the distribution is poor, while the global correction rate distribution of the NeQuick model is more average and smooth.
【作者单位】： 解放军信息工程大学导航与空天目标工程学院;西安测绘研究所;
【分类号】：P228.4;P352
[Abstract]:Ionospheric delay error is one of the main error sources of navigation and positioning signal in space propagation path, so it is of practical significance to fully understand the correction accuracy of GNSS ionospheric model. According to the ionospheric correction model adopted by GPS,BDS and Galileo systems, the correction accuracy of ionospheric delay of three systems is evaluated and analyzed by using the ionospheric correction parameters in 2014 and using the high-precision global ionospheric map as the benchmark. The results show that the correction rates of several ionospheric correction models used by GNSS are about 65% / 75%, and the correction accuracy of the second edition of NeQuick model used by Galileo system is not significantly higher than that of the first version of NeQuick model. The accuracy of the Klobuchar 8 parameter model used by GPS is very high in the mid latitude region of 25 掳- 45 掳N in the Northern Hemisphere, but in other regions of the world the accuracy is lower and the distribution is poor, while the global correction rate distribution of the NeQuick model is more average and smooth.
【作者单位】： 解放军信息工程大学导航与空天目标工程学院;西安测绘研究所;
【分类号】：P228.4;P352
【参考文献】
相关期刊论文 前3条
1 张强;赵齐乐;章红平;胡志刚;伍岳;;北斗卫星导航系统Klobuchar模型精度评估[J];武汉大学学报(信息科学版);2014年02期
2 谢杰;张博;侯博;姚志诚;刘光斌;;Galileo卫星导航系统广播NeQuick模型及其参数拟合[J];空间科学学报;2012年06期
3 章红平;平劲松;朱文耀;黄s，
本文编号：2444153
本文链接：https://www.wllwen.com/kejilunwen/dizhicehuilunwen/2444153.html
