摘要
为解决朔月期的卫星自主导航,提出了一种利用日地月光学信息(SEMOI)的实现方法。利用朔月期卫星-太阳方向矢量与卫星-地球方向矢量间夹角,由迭代最小二乘法估计历元时刻的卫星定位数据,并以轨道预报方式实现卫星自主导航。给出了计算流程。仿真结果表明,该法的定位精度可满足民用卫星的导航要求。最后讨论了采样周期和敏感器精度等因素对定位精度的影响。
An autonomous navigation using sun-earth-moon optical information for satellite during new-moon period was put forward in this paper. The iterative least square method was used to estimate the position data for the satellite at epoch time according to the angle between satellite-sun vector and satelllte-earth vector during new-moon period in the method, and the autonomous navigation for satellite was implemented by orbit forecast. The algorithm flowchart was given. The simulation results showed that the positioning accuracy would meet the requirement for civil satellite. At last, the influence factors of sampling period and sensor precision on the positioning accuracy were discussed.
出处
《上海航天》
北大核心
2006年第4期8-12,共5页
Aerospace Shanghai
关键词
卫星自主导航
朔月
日地月光学信息
迭代最小二乘法
扩展卡尔曼滤波
定位精度
Satellite＇autonomous navigation
New-moon period
Sun-earth-moon optical information
Iterative least square method
Extended Kalman filtering
Positioning accuracy
