摘要
X射线脉冲星自主导航(XNAV)中,时间测量与转换误差会对导航精度产生不可忽视的影响.本文在对XNAV算法研究的基础上,进一步研究了利用差分抑制时间测量与转换误差对导航精度的影响.研究结果表明:双差能有效抑制时间测量误差对导航精度的影响,但是无法抑制时间转换误差对导航精度的影响;三差既能有效抑制时间测量误差对导航精度的影响,也能有效抑制时间转换误差对导航精度的影响.
Because the essence of the traditional X-ray pulsar navigation （XNAV） is to measure and convert the time accurately, the errors of time measurement and conversion can affect the navigation precision. In the paper, measurement difference is adopted to reduce the effect of time measurement and conversion errors to navigation precision. Results demonstrate that double differences can reduce the effect of time measurement error to navigation precision, but can not reduce the effect of time conversion error to navigation precision, meanwhile, triple differences can reduce both the effect of time measurement and conversion errors to navigation precision. The research results are referable to the application of XNAV.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2013年第9期896-900,共5页
Transactions of Beijing Institute of Technology
基金
中国科学院空间科学预研项目(XDA04074300)
关键词
X射线脉冲星导航
双差
三差
导航精度
X-ray pulsar navigation
double difference
triple difference
navigation precision
