Application of 3-D ray-tracing for accurate GPS range finding

被引:0
|
作者
Zulkifli, Siti Sarah Nik [1 ]
Abdullah, Mardina [1 ]
Ismail, Mahamod [1 ]
机构
[1] Univ Kebangsaan Malaysia, Fac Engn, Dept Elect Elect & Syst Engn, Bangi 43600, Selangor Darul, Malaysia
来源
2007 5TH STUDENT CONFERENCE ON RESEARCH AND DEVELOPMENT | 2007年
关键词
GPS; ionosphere; ray-tracing; RRE;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Ionospheric error affects the accuracy of Global Positioning System (GPS). This paper studies the ionospheric error on transionospheric signal propagation from satellite to ground paths using readily available GPS satellites utilizing Jones 3-D ray-tracing. The ionospheric delay or advance is obtained from the difference between the distance of the ray path to the receiver from the satellite determined from the ray-tracing and the distance for propagation over the line of sight (LOS) at the velocity of light in vacuum. The residual range error (RRE), that is the difference between the standard dual frequency models corrected range and LOS, is calculated. Results show that the RRE of group value is different from RRE of phase advance. The higher order term in total electron content (TEC) calculation that relates to the refractive index is normally neglected due to its small value, but the results of ray-tracing clearly show that it does have some effects. These results should be considered for accurate GPS range finding.
引用
收藏
页码:396 / 400
页数:5
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