摘要
GLONASS卫星星历以3个常数表示摄动加速度在各坐标轴上的分量,即认为摄动项在拟合时段内保持不变。这样的摄动模型与实际相差较远,为保证精度,其星历更新间隔短至半个小时。本文提出了针对导航卫星摄动加速度的二次多项式建模法。首先以多项式拟合短时段内的摄动项精度更高,同时选取二次多项式也不会过量增加星历参数个数。为研究该方法在北斗导航系统中的适用性,星历拟合实验选取了三种不同类型的导航卫星:GEO卫星、IGSO卫星和MEO卫星。
The GLONASS satellite ephemeris represents the component of the perturbation acceleration on each axis in three constants,ie the perturbation term is considered to remain constant during the fitting period.This perturbation model is far from the actual difference,in order to ensure accuracy,the ephemeris update interval as short as half an hour.In this paper,aquadratic polynomial modeling method for perturbation acceleration of navigation satellites is proposed.A polynomial is used to fit the perturbation term in the short period,and the quadratic polynomial is chosen,so the number of ephemeris parameters will not grow too much.In order to study the applicability of this method in BeiDou Navigation Satellite System,three different types of navigation satellites were selected：ephemeris fitting experiment：GEO satellite,IGSO satellite and MEO satellite.
出处
《北京测绘》
2017年第5期1-5,共5页
Beijing Surveying and Mapping
关键词
卫星导航
广播星历参数
二次多项式拟合
摄动
satellite navigation
broadcast ephemeris
quadratic polynomial fitting
perturbation
