在多站定轨理论的基础上 ,从分析单个信源对定轨精度的影响出发 ,建立了偶发性系统误差辨识模型 ,提出了更好地融合多信源的有效信息 ,避免偶发性系统误差污染的方法原理 .结合实际工程任务 ,将所研究的方法进行了应用 ,实际与仿真结果表明此方法可靠、有效 .成功地诊断出在某些信源下的显著系统误差 ,大大地提高了飞行器定轨的精度 Based on the theory of multi-station orbit determination, starting from the analysis of the influence of a single source on the orbit accuracy, a model of incidental system error identification is established, and the effective information from multiple sources is better blended to avoid sporadic system error The method and principle of pollution are combined with the practical engineering tasks, and the methods studied are applied.The practical and simulation results show that this method is reliable and effective.It has successfully diagnosed significant systematic errors under some sources and greatly improved the capability of aircraft Orbit accuracy