摘要
X射线脉冲星导航是一种基于X射线脉冲星观测的新型天文自主导航方法,脉冲星在轨动态信号处理技术一直是脉冲星导航的难点和重点,特别是低轨高动态条件下的信号处理比高轨低动态情况更加困难。针对动态信号处理中实测数据信噪比偏低的问题,提出了一种适用于低轨高动态情况的脉冲星动态信号处理方法,并对其原理进行了分析,建立了相关数学模型,并使用HXMT卫星和XPNAV-1卫星的实测数据验证了算法性能,实验结果表明:该方法有效提高了导航观测量处理精度。
X-ray pulsar-based navigation is a novel astronomical autonomous navigation method based on X-ray pulsar observation.,The dynamic data processing is one of the key technologies for X-ray Pulsar-based navigation.Especially data processing under the condition of low-orbit and high-dynamic is more difficult than that under the conditions of high-orbit and lowdynamic.Aiming at the measured data with low signal-to-noise ratio,a target function re-estimation method is proposed for the condition of low-orbit and high-dynamic.Furthermore,the principle of the method is analyzed and the mathematical model is constructed.The performance of the method is verified by the measured data from HXMT and XPNAV-1 satellites.
作者
张大鹏
李治泽
王奕迪
郑伟
ZHANG Dapeng;LI Zhize;WANG Yidi;ZHENGWei(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;Xi’an Satellite Control Center,Xi’an 710043,China)
出处
《深空探测学报》
2019年第4期335-340,共6页
Journal Of Deep Space Exploration
基金
国家自然科学基金资助项目(0901010517001)
