Galileo卫星导航系统广播NeQuick模型及其参数拟合  

Simulation of NeQuick Parameters of Galileo Satellite Navigation System

作　　者：谢杰[1] 张博[1] 侯博[1] 姚志诚[1] 刘光斌[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《空间科学学报》2012年第6期881-886,共6页Chinese Journal of Space Science

基　　金：国家高技术研究发展计划项目(2010AA7010213);军队重点科研项目(EP050068-23)共同资助

摘　　要：提出了基于IGRF模型的Galileo广播NeQuick模型及其参数拟合算法,解决了Galileo信号仿真中地理场景映射与地磁坐标下的电离层延迟修正参数拟合问题.应用IGRF模型,可计算出任意给定位置和时间点的地磁参数以及E层、F_1层、F_2层的电子密度,从而计算出Galileo电离层修正参数.仿真结果表明,该算法拟合的全球电离层延迟与IGS提供的实际观测值基本一致,仿真精度高于一般的经验电离层模型,实现了Galileo卫星信号的电离层延迟修正参数的精确仿真.The simulation model of Galileo ionospheric parameters based on IGRF is proposed to solve the problem that ionospheric parameters estimation is related to geomagnetic coordinates. Using IGRF, the geomagnetic elements of the geomagnetic field and the Electron Density can be computed at a given location and time, sequentially, the ionospheric parameters of Galileo can be calculated. The simulation results show that the ionospheric delay calculated by this model is consistent with the value observed by IGS, and the precision is higher than those by other models, which proves that the high precision simulation of the Galileo ionospheric parameters is realized.

关 键 词：电离层误差 NeQuick模型 Galileo卫星 IGRF模型 

分 类 号：TN967.1[电子电信—信号与信息处理]