物理学报2012，Vol.61Issue(20)：583-589,7.
X射线脉冲星导航系统导航精度的研究
Research of the navigation accuracy for the X-ray pulsar navigation system
摘要
Abstract
In order to improve the navigation accuracy of the X-ray pulsar navigation system, in this paper we propose a constant fraction timing method based on the low-pass filter to measure the arrival time of the X-ray pulse in X-ray pulsar navigation. According to the technical scheme, the timing accuracies and dead times of original peaking timing and the improved constant fraction timing are measured. Experimental results indicate that the timing accuracy and the dead time of the peaking timing system are 18 ns and 4750 ns, the timing accuracy and the dead time of the constant fraction timing system are 0.78 ns and 105 ns. The timing accuracy and the dead time of constant fraction timing system are significantly improved compared with those of the peaking timing system. In the X-ray pulsar navigation system, the cumulative pulse profile of the X-ray pulse is constructed in the two different timing systems through measuring the arrival time of the X-ray photon. Experimental results indicate that compared with using the peaking timing system, the cumulative pulse profile of the X-ray pulse using the improved constant fraction timing system is improved obviously, therefore, the navigation accuracy could be improved by using the constant fraction timing system.关键词
探测器/X射线脉冲星导航/定时精度/死时问Key words
detectors/X-ray pulsar navigation/timing accuracy/dead time分类
信息技术与安全科学引用本文复制引用
王朋,赵宝升,盛立志,胡慧君,鄢秋荣..X射线脉冲星导航系统导航精度的研究[J].物理学报,2012,61(20):583-589,7.基金项目
国家自然科学基金青年科学基金,(批准号：11103069,61007017)资助的课题. （批准号：11103069,61007017）
