西安电子科技大学空间科学与技术学院,陕西西安 710126
[ "张泽葳 男,1998年1月出生于山西省晋中市.现为西安电子科技大学在读博士生.主要研究方向为航天器及编队自主导航. E-mail: zeweizhang@stu.xidian.edu.cn" ]
[ "包为民 男,1960年3月出生于黑龙江省哈尔滨市.制导与控制专家、中国科学院院士、国际宇航科学院院士.现为中国航天科技集团公司科技委主任. E-mail: baoweimin_xd@163.com" ]
[ "方海燕 女,1974年出生于山东省济宁市.教授,博导.主要研究方向为X射线脉冲星导航、“觅音”计划卫星平台高精度测量及地面验证.中国电子学会会员编号:E190015406M.E-mail: hyfang@xidian.edu.cn" ]
[ "苏剑宇 男,1992年出生于山西省晋城市.现为西安电子科技大学在读博士生.主要研究方向为X射线脉冲星导航. E-mail: sjychangmian@163.com" ]
[ "李小平 女,1961年出生于山西省.教授,博导.主要研究方向为空间测控通信、空间科学及应用、智能通信及信息处理.中国电子学会会员编号:E190015417M.E-mail: xpli@xidian.edu.cn" ]
姚云峰 男,1996年出生于河北省张家口市.2022年硕士毕业于西安电子科技大学,现为中国电子科技集团公司第五十四研究所工程师,从事导航技术方面研究. E-mail: 1171095952@qq.com
收稿:2022-09-02,
修回:2023-04-04,
纸质出版:2024-09-25
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张泽葳, 包为民, 方海燕, 等. 一种快速X射线脉冲星光子到达时间转换的简化模型[J]. 电子学报, 2024, 52(09): 2939-2949.
ZHANG Ze-wei, BAO Wei-min, FANG Hai-yan, et al. A Fast Simplified Model for X-ray Pulsar Photon Arrival Time Conversion[J]. Acta Electronica Sinica, 2024, 52(09): 2939-2949.
张泽葳, 包为民, 方海燕, 等. 一种快速X射线脉冲星光子到达时间转换的简化模型[J]. 电子学报, 2024, 52(09): 2939-2949. DOI:10.12263/DZXB.20221003
ZHANG Ze-wei, BAO Wei-min, FANG Hai-yan, et al. A Fast Simplified Model for X-ray Pulsar Photon Arrival Time Conversion[J]. Acta Electronica Sinica, 2024, 52(09): 2939-2949. DOI:10.12263/DZXB.20221003
高精度X射线光子到达时间转换模型对脉冲星导航的精度至关重要,针对目前完整模型复杂而简化模型精度有限的问题,本文提出了一种精度不低于已有简化模型的快速简化模型.通过对现有完整模型的推导,从理论上分析了各延迟项对模型精度的影响,指出罗曼延迟仍是影响简化模型精度的关键.通过改变罗曼延迟的表达式及其二阶展开方式并考虑物理量的易获取度,得到一种快速简化模型.利用完整模型及所提简化模型对中子星内部组成探测器(Neutron star Interior Composition Explorer,NICER)和慧眼硬X射线调制望远镜(Hard X-ray Modulation Telescope,HXMT)的实测光子数据进行时间转换,分析了所提模型的精度和计算效率;利用数值仿真分析了轨道高度、脉冲星角位置测量误差对简化模型精度的影响,讨论了不同高度地球轨道应用中该简化模型的精度及计算效率.结果表明本文所提简化模型相比Sheikh简化模型和fei模型计算效率分别提高50%和10%,且未造成精度降低.
A high-precision X-ray photon arrival time conversion model is crucial to the accuracy of X-ray Pulsar-based Navigation. Aiming at the current problem that the complete model is complex and the simplified model has limited accuracy
a fast simplified model with accuracy no less than the existing simplified model is proposed in this paper. Through the derivation of the existing complete model
the influence of each delay item on the accuracy of the model is theoretically analyzed
and it is pointed out that the Roemer delay is still the key to the accuracy of the simplified model. A fast simplified model was obtained by changing the expression of the Roemer delay and its second-order expansion
and considering the ease of access to physical quantities in practical application. The accuracy and computational efficiency of the proposed model are analyzed by using the complete model and the proposed simplified model to time-transform the measured photon data of NICER (Neutron star Interior Composition Explorer) and HXMT (Hard X-ray Modulation Telescope) satellites. Furthermore
the influence of orbital altitude and pulsar angular position measurement errors on the accuracy of the simplified model is analyzed by numerical simulation
and the accuracy and computational efficiency of the simplified model in the application of Earth orbit at different altitudes are discussed. The results show that the computational efficiency of the simplified model proposed in this paper is improved 50% than that of the Sheikh’s simplified model and 10% than the fei’s model
without causing a decrease in accuracy.
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