深空测控网干涉测量系统在“鹊桥”任务中的应用分析
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摘要
在"嫦娥4号"任务的第一阶段—"鹊桥"阶段,北京航天飞行控制中心利用佳木斯及喀什深空站对"鹊桥"进行了干涉测量观测,获取了实时与事后的高精度测角观测量,有效支持了任务的实施。两深空站需同时完成测控任务,无法交替射电源观测来进行系统差标校,基于此系统采用了长时间隔、在航天器观测前及双站结束后观测射电源的标校方法,在地月转移段、月球至L2转移段、Halo轨道形成段开展了多次干涉测量观测,所获得的时延、时延率结果直接应用于事后联合轨道确定,结果表明:深空网的时延观测精度约为3 ns。
In Queqiao mission, the first stage of Chang'e-4 mission,Queqiao mission,Jiamusi and Kashi deep space stations were used to conduct VLBI(Very Long Baseline Inteferometry) observation to the relay satellite. Real-time and post-time highprecision angular measurement results were obtained,which effectively supported the mission implementation. In the mission,the two deep space stations need to complete the TT&C tasks at the same time,so they cannot alternate the radio source and spacecraft observation to calibrate the system error. Based on this system,a long time interval calibration method was adopted to observe the radio source before and after the spacecraft observation. Multiple interferometric measurements were carried out in the lunar transfer section,the Lunar to L2 transfer section and the Halo orbital formation section. The results show that the observation accuracy of the deep space network is about 3 ns.
In Queqiao mission, the first stage of Chang'e-4 mission,Queqiao mission,Jiamusi and Kashi deep space stations were used to conduct VLBI(Very Long Baseline Inteferometry) observation to the relay satellite. Real-time and post-time highprecision angular measurement results were obtained,which effectively supported the mission implementation. In the mission,the two deep space stations need to complete the TT&C tasks at the same time,so they cannot alternate the radio source and spacecraft observation to calibrate the system error. Based on this system,a long time interval calibration method was adopted to observe the radio source before and after the spacecraft observation. Multiple interferometric measurements were carried out in the lunar transfer section,the Lunar to L2 transfer section and the Halo orbital formation section. The results show that the observation accuracy of the deep space network is about 3 ns.
引文
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[3]杨轩,鄢建国,叶茂,等.对一种月球与火星探测多程微波测量链路定轨定位的数值模拟初步分析[J].深空探测学报,2018,5(2):154-161.YANG X,YAN J G,YE M,et al.Preliminary numerical analysis of precise orbit determination for a multi-way microwave measurement mode in the Lunar and Mars missions[J].Journal of Deep Space Exploration,2018,5(2):154-161.
[4]陈略,唐歌实,任天鹏,等.再入返回飞行试验深空网干涉测量应用分析[J].飞行器测控学报,2015,34(5):407-413.CHEN L,TANG G S,REN T P,et al.Application of CDSNinterferometric tracking in reentry return flight test missions[J].Journal of Spacecraft TT&C Technology,2015,34(5):407-413.
[5]徐茂格,施为华.深空微波测距测速现状及发展建议[J].深空探测学报,2018,5(2):140-146.XU M G,SHI W H.Development of deep space radio ranging and velocity measurement technology[J].Journal of Deep Space Exploration,2018,5(2):140-146.
[6]李海涛,周欢,郝万宏,等.深空导航无线电干涉测量技术的发展历程和展望[J].飞行器测控学报,2013,32(6):470-478.LI H T,ZHOU H,HAO W H,et al.Development of radio interferometry and its prospect in deep space navigation[J].Journal of Spacecraft TT&C Technology,2013,32(6):470-478.
[7]陈略,唐歌实,王美,等.干涉测量宽带相关处理算法与验证[J].飞行器测控学报,2011,30(6):77-81.CHEN L,TANG G S,WANG M,et al.Interferometry measurement broadband correlation processing algorithm and verification[J].Journal of Spacecraft TT&C Technology,2011,30(6):77-81.
[8]郑为民,舒逢春,张冬.应用于深空跟踪测量的VLBI软件相关处理技术[J].宇航学报,2008,29(1):18-23.ZHENG W M,SHU F C,ZHANG D.Application of software correlator to deep space VLBI tracking[J].Journal of Spacecraft TT&CTechnology,2008,29(1):18-23.
[9]韩松涛,陈略,任天鹏,等.中国深空网首次△DOR联合测轨试验分析[J].飞行器测控学报,2014,33(3):258-261.HAN S T,CHEN L,RENG T P,et al.RENG T P,et al.Analysis of the first multi-agency joint△DOR tracking China’s deep space network[J].Journal of Spacecraft TT&C Technology,2014,33(3):258-261.作者简介: