基于GALILEO及GPS-GALILEO组合系统的仿真分析  

Simulation and Analysis of System Performance of GALILEO and Integrated GPS-GALILEO

作　　者：赵春梅[1] 欧吉坤[1] 文援兰[2] 

机构地区：[1]中国科学院测量与地球物理研究所动力大地测量学重点实验室,湖北武汉430077 [2]国防科技大学,湖南长沙410073

出　　处：《系统仿真学报》2005年第4期1008-1011,共4页Journal of System Simulation

基　　金：国家自然科学基金(40204001);中科院知识创新工程领域前沿项目(030185)。

摘　　要：根据GALILEO卫星系统的设计参数,建立了卫星运动方程,编制了GALILEO系统的星座仿真软件;并结合GPS系统,以中国地壳运动观测网的25个基准站为地面观测站,对大陆范围内基于GPS、GALILEO以及GALILEO-GPS组合系统进行单点定位时的卫星可见性和给定精度下的定位可信度进行了系统的分析。仿真结果表明,在中国大陆范围内,GALILEO系统在时间域和空间域上的整体稳定性优于GPS系统。在一定的定位精度要求下,二者的平面定位可信度基本一致,GALILEO的高程定位可信度优于GPS系统;组合的GPS-GALILEO系统无论在卫星可见性方面,还是在定位可信度方面,均优于单一的定位系统。Satellite motion equation is established based on design parameters of Galileo system and software are compiled to simulate Galileo constellation. Based on twenty-five stations of Crustal Moment Observation Network of China, satellite visibility and positioning creditability based on GPS, GALILEO and integrated GPS-GALILEO are analyzed deeply. Simulation results reveal that global stability and creditability of GALILEO are superior to GPS in temporal and spatial domain. Given positioning accuracy, horizontal positioning creditability of GALILEO is consistent with that of GPS, but vertical positioning creditability of GALILEO is superior to that of GPS obviously. Integrated GPS-GALILEO is superior to single system from aspects of satellite availability and creditability.

关 键 词：GPS GALILEO 精度因子 可信度 仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]