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地月系L2点中继星激光测距成功率的估算
Alternative TitleEstimation of the Success Probability for Relay Satellite Laser Ranging Around E-M L2
李春晓1,2; 高清鹏1,2; 李语强1; 李祝莲1
Source Publication天文研究与技术(Astronomical Research & Technology)
2019-01
Volume16Issue:01Pages:44-53
DOI10.14005/j.cnki.issn1672-7673.20180703.001
ClassificationP171.3 ; P228.5
Contribution Rank第1完成单位
Indexed ByCSCD
Keyword中继星激光测距 L2点晕轨道 测距成功率
Abstract

为了模拟位于地月系L2点的中继星“鹊桥”与月球的位置关系,进而估算中继星激光测距的成功率,按照轨道周期约为14天的要求对中继星所在的晕轨道进行计算,建立了一个综合考虑望远镜抖动、大气抖动和预报轨道横向偏离的模型。从数值上给出了一条轨道周期为14. 78天,X方向(地月连线方向)振幅为12 493 km,Y方向为34 596 km,Z方向(垂直于地月轨道平面方向)为11 916 km的周期轨道。由于晕轨道的最小振幅远大于月球遮挡的临界振幅4 000 km,因此月球对中继星不存在遮挡问题。基于建立的测距成功率模型,根据昆明站(国际编号:7820)的激光测距系统对运行在该轨道上的中继星进行测距成功率分析,结果表明:测距成功率随着中继星横向轨道标准差的增大呈快速降低的趋势。对于中继星到测站的平均距离而言,当中继星没有横向偏离时,探测器产生的光电子数为0. 151,成功率为14. 07%;横向偏离2 km时,光电子数降为0. 035,成功率降为3. 46%。对比最近距离与最远距离的情况,无横向偏离的情况下,探测器产生的光电子数从0. 174降为0. 139,成功率从16. 01%降为13. 02%。该计算结果可为云南天文台1. 2 m望远镜实现中继星激光测距提供参考。

Other Abstract

To simulate the positional relationship between the Moon and the relay satellite 'magpie bridge' in a halo orbit around L2 of the Earth-Moon system, then to evaluate the laser ranging success probability, in this paper we make a computation on the halo orbit with a request of about 14 days in its period, and establish a model given the tremble of the telescope, of the atmosphere and the transverse deviation from the predicted orbit. A numerical halo orbit is given with the period of 14.78 days, the amplitude is 12493km in X (along the Earth-moon connection direction), 34596km in Y, and 11916km in Z (orthogonal to the Earth-moon orbital plane). The minimum amplitude of the calculated halo orbit goes far beyond the Moon-sheltered critical amplitude which is generally 4000km, thus no shade from the Moon exists on the relay satellite. Based on the model of laser ranging success probability established previously, we make an analysis on the success probability according to the laser ranging system at KUNL station (International ID: 7820), and the results indicate that the laser ranging success probability rapidly drops down with the increase of the orbit transverse standard deviation. For the average distance from the station to the relay satellite, the detector produces about 0. 151 photoelectrons within a single pulse and the corresponding success probability is 14.07% when there is no deviation from the predicted orbit; the number of photoelectrons drops down to 0.035 and the corresponding success probability down to 3.46% when the relay satellite transversely deviates 2km from the predicted orbit. Comparing between the nearest distance and the furthermost distance, with no deviation, the number of photoelectrons declines to 0.139 from 0.174 and the corresponding success probability shrinks to 13.02% from 16.01%. The results provide a reference for the realization of the relay satellite laser ranging with 1.2m telescope at Yunnan Observatory in the following days.

Funding Project国家自然科学基金[11655001] ; 中国科学院精密导航定位与定时技术重点实验室开放课题[2014PNTT09]
Funding Organization国家自然科学基金[11655001] ; 中国科学院精密导航定位与定时技术重点实验室开放课题[2014PNTT09]
Language中文
Subject Area天文学 ; 天体测量学
MOST Discipline Catalogue理学 ; 理学::天文学
ISSN1672-7673
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12368
Collection应用天文研究组
Corresponding Author李春晓
Affiliation1.中国科学院云南天文台,云南,昆明,650011
2.中国科学院大学,北京,100049
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
李春晓,高清鹏,李语强,等. 地月系L2点中继星激光测距成功率的估算[J]. 天文研究与技术(Astronomical Research & Technology),2019,16(01):44-53.
APA 李春晓,高清鹏,李语强,&李祝莲.(2019).地月系L2点中继星激光测距成功率的估算.天文研究与技术(Astronomical Research & Technology),16(01),44-53.
MLA 李春晓,et al."地月系L2点中继星激光测距成功率的估算".天文研究与技术(Astronomical Research & Technology) 16.01(2019):44-53.
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