摘要
系统研究了利用X射线脉冲星观测量进行动力学定轨的全过程,给出了观测数据仿真的基本流程,并利用仿真数据对各项因素对定轨精度的影响进行了量化分析。
Compared to existing satellite navigation systems X-ray pulsar navigation can en large the service scope. And it can improve the anti-jamming characteristic and autonomous navigation capability. In this paper we analyzed the process of dynamic orbit determination using X-ray pulsar measurement systemically. The basic steps of simulating the observation measurement are presented. Quantification analyses are carried out aimed to study the influence of all kinds of error on orbit determination. Results indicate that calculating spacecraft position and clock error simultaneously can reduce the influence of position of datum mark. Because it can absorb the systematical error. But the calculated clock error can not reflect the intrinsical error of atomic clock. So we need other methods to correct the clock error. Phase error and pulsar visibility are the major influence in orbit determination. And when we want to increase the number of observed pulsar, observation error must be take into account in order avoid the decrease of orbit determination precision.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2010年第4期500-503,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40604003)
