摘要
在分析低轨卫星轨道变化特征的基础上,考虑GPS广播星历参数的物理意义明确、生成速度快、精度高、参数少等特点,设计了一套适于低轨卫星在轨位置计算的星历参数,并对其算法进行了试算。同时对GPS广播星历15参数法与设计的25参数法进行了拟合对比,结果表明,同样条件下25参数法应用于低轨卫星轨道拟合时精度较高。
On the basis of the orbit character of the LEO satellite and the advantages of definite physical meanings, quickly creating, high precision, fewer parameters of GPS broadcast ephemeris, a new sort of ephemeris parameters for calculating LEO satellite location is designed and analyzed through a example. Some significant comparisons are made between the 15-parameter method of GPS broadcast ephemeris and the designed 25-parameter method, the results show that the designed 25 parameters method has a higher precision for LEO satellite orbit fitting under the same condition.
出处
《大地测量与地球动力学》
CSCD
北大核心
2007年第1期85-90,共6页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40234039)
关键词
GPS广播星历
低轨卫星
轨道分析
星历参数
拟合精度
GPS broadcast ephemeris, LEO satellite, orbit analysis, ephemeris parameter,fitting precision