GNSS卫星导航精度与选星算法研究

摘要

Due to the limitations of ground-based navigation systems,the Civil Aviation proposes the navigation system scheme based on satellite technology. GNSS satellite navigation technology is becoming the next generation navigation and surveillance technology of civil aviation air traffic management. The paper focuses on the GNSS satellite navigation accuracy and satellite selection algorithm,explores the GDOP which influences the satellite navigation accuracy,and makes a comparative study of three satellite selec-tion algorithms.It is concluded that GNSS navigation has a significant influence on the positioning accuracy,and proper application of satellite selection algorithm can improve the navigation accuracy and computation time.%由于陆基导航系统的局限性，民航提出了以应用卫星技术为基础的导航系统方案。全球导航卫星系统（ GNSS）将成为下一代民航空中交通管理的导航监视新技术。重点研究了GNSS卫星导航精度和选星算法，探讨了影响卫星导航精度的几何精度因子，对3种不同的选星算法进行了对比研究。仿真结果表明， GNSS导航对提高定位精度有重要影响，合理地利用选星算法能够提高系统的导航精度以及运算时间。