摘要
基于第一类无奇点要素的拟合参数和5°倾角旋转法,可以实现GEO发播电文与MEO和IGSO的电文一致性,但是没有完全避免数学奇异性。文章从无奇点要素的选取和主要摄动力的影响分析两方面出发,提出了一套16参数的GEO星历表示法。首先,利用同步要素描述卫星的星下点运动轨迹;其次,摄动参数中顾及了地球引力位田谐项引起的定点漂移。拟合试验表明,2h星历拟合的用户距离误差的均方根优于0.01m。
The first class of no singularity variables as fitting parameters, along with the orbital inclination of 5° rotation, can easily keep the broadcast ephemeris of GEO consistent with that of MEO and IGSO. However, the singularity problem caused by orbital elements still exists to some extent. A 16-parameter fitting set was presented specifically for GEO ephemeris fitting. Firstly, GEO elements were introduced to describe the motion of GEO＇s sub-satellite point. Secondly, the longitude drift due to tesseral harmonic terms of geopotential was considered in the design of perturbed parameters. Fit simulations show that the root of mean squares of user range error with 2h data set is better than 0.01m.
出处
《中国空间科学技术》
CSCD
北大核心
2013年第3期46-51,共6页
Chinese Space Science and Technology
基金
国家自然科学基金(41174025,41174026)
上海市空间导航与定位技术重点实验室开放课题(0901)
中国科学院精密导航定位与定时技术重点实验室开放基金(2012PNTT07)资助项目
关键词
广播星历参数
拟合
无奇点要素
同步要素
摄动
地球静止轨道
导航卫星
Broadcast ephemeris parameters Fitting Nonsingular orbital elementsGEO elements Perturbation Geostationary Earth Orbit Navigation satellite
