摘要
分析北斗一代对我国及周边地区的覆盖特性,研究以现有北斗一代3颗GEO卫星为基础的IGSO区域导航星座的优化设计。通过对星下点轨迹的仿真分析,得出区域覆盖特性最优时IGSO星座的升交点赤经、近地点幅角、初始相位角应满足的条件。采用网格点仿真法,以区域覆盖特性和位置精度因子为优化指标,阐述IGSEO星座的偏心率和IGSCO星座的倾角的优化设计过程。给出2种基于北斗一代的区域导航星座方案,2种方案均可对我国及周边地区实现连续6重覆盖,且平均PDOP小于4。
Analyze coverage characteristics of Beidou I to our country and our periphery zone. The optimal design for Inclined Geo-Synchronous Orbit （IGSO） regional navigation constellation based on 3 Geostationary Earth Orbit （GEO） satellites of Beidou I is a major research here. By simulation analysis about the sub-satellite point trace, educe what conditions the right ascension of the ascending node （RAAN）, the argument of perigee and the original phase angle of constellation should satisfy when the coverage performance is optimal. Adopting the method of grid simulation and Taking the regional coverage performance and the Position Dilution of Precision （PDOP） as optimal indexes, the optimal design process for eccentricity of inclined geo-synchronous ellipse orbit （IGSEO） constellation and inclination of inclined geo-synchronous circular orbit （IGSCO） constellation is stated. Two themes of regional navigation constellation based on Beidou I are given. Both the two themes can enable a six-fold continuous coverage to China and its surrounding areas, and the average PDOP is less than 4.
出处
《兵工自动化》
2009年第8期8-10,14,共4页
Ordnance Industry Automation
