摘要
介绍了利用星间距离观测值和由预报星历提供的先验信息采用最小二乘配置法进行导航卫星自主定轨的方法、模型及软件;采用自编软件进行了一系列的模拟计算,分别探讨了观测值随机噪声、残余系统误差和先验信息的好坏对自主定轨精度的影响。结果表明,随机噪声对自主定轨精度的影响不明显,而系统误差和先验信息的影响则较为重要,值得关注。
Method,model and software of AOD（autonomous orbit determination） of navigation satellites by using least square collocation method has been introduced in this paper based on cross-link ranging observations and the prior information provided by forecasting ephemeris.Series of simulations through self-developed software has discussed the influence of measurement noise,residual systematic error of observations and the quality of prior information to precision of AOD.Results indicated that measurement noise contributes less obvious influence on AOD precision,while effects of residual systematic error and the prior information are more distinct,which need to be considered seriously in practical application.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第7期797-801,834,共6页
Geomatics and Information Science of Wuhan University
基金
国家863计划资助项目(2006AA12Z325
2009AA12Z301)
武汉大学卫星导航与定位教育部重点实验室(B类)开放研究基金资助项目(GRC-2009008)
关键词
自主定轨
星间距离观测值
观测噪声
系统误差
先验信息
AOD（autonomous orbit determination）
cross-link ranging observations
measurement noise
systematic error
prior information
