现阶段北斗卫星导航系统可用性分析

Usability Analysis of Beidou Satellite Navigation System at the Present Stage

我国自主研发的北斗卫星导航系统目前已发射9颗卫星,其中投入使用的3颗GEO和3颗IGSO在亚太地区组成了一个"3+3"的星座。研究系统可用性,对北斗卫星导航系统后期建设和改进具有重要意义。通过STK和mathematica对该星座的DOP值和可见星数进行了仿真分析。仿真结果表明,现阶段"3GEO+3IGSO"星座在服务区域内可见性和定位精度较好,具有良好的可用性。

Beidou Satellite Navigation System,which is run by our country herself,has already launched 9 satellites.With 3 GEOs and 3 IGSOs,a ‘3＋3’ constellation has been formed in the Asia Pacific region.The research on the system ability has a profound impact on the further construction and improvement of the Beidou Satellite Navigation System.In this paper,a simulate analysis of DOP and the visible satellites of the constellation have been made through STK and mathematica.As is shown from the simulate analysis,in the ‘3GEO＋3IGSO’ constellation serice area,the visibility is good and the positioning is quite accurate,which make it clear that the ‘3GEO＋3IGSO’ constellation has a high level of usability.