摘要
GPS卫星广播星历参数具有参数少、物理意义明确以及精度高等特点,可以考虑将它应用于包含MEO、IGSO和GEO卫星的混合星座卫星导航系统。分析了采用GPs卫星广播星历参数时MEO、IGSO和GEO卫星的广播星历拟合精度,并且比较分析了在一个卫星的轨道周期内,广播星历参数拟合结果的变化规律。仿真结果表明,MEO、IGSO和GEO卫星的广播星历拟合误差最大在分米量级;MEO和IGSO卫星在一个轨道周期内星历参数拟合结果的变化规律相近,但是与GEO卫星的差异较大。
The broadcast ephemeris parameters for GPS have the characters of less parameters, unambiguous physical significance and high precision. It may be used in hybrid-constellation satellite navigation system which includes different kinds of satellites, for example, MEO satellites, IGSO satellites and GEO satellites. The accuracy of broadcast ephemeris for above different kinds of satellite orbits using the broadcast ephemeris parameters for GPS was analyzed. The variety law of the fitting result for broadcast ephemeris parameters within an orbit period of satellite was com- pared too. The simulation result shows that the fitting errors of broadcast ephemeris for MEO, IGSO and GEO are less than decimeters. It also shows that the variety laws of the fitting result of broadcast ephemeris for MEO and IGSO satellites are similar to each other and are different to GEO satellites.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2008年第4期7-12,共6页
Chinese Space Science and Technology
基金
武器装备预研基金(51400201013KG01)
关键词
卫星导航系统
广播星历参数
混合星座
Satellite navigation system Broadcast ephemeris parameters hybrid-constellation
