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李康康, 谷德峰, 安子聪, 宋佳凝, 朱炬波. 空间引力波探测器轨道确定及仿真分析[J]. 深空探测学报(中英文), 2021, 8(2): 182-189. DOI: 10.15982/j.issn.2096-9287.2021.20200081
引用本文: 李康康, 谷德峰, 安子聪, 宋佳凝, 朱炬波. 空间引力波探测器轨道确定及仿真分析[J]. 深空探测学报(中英文), 2021, 8(2): 182-189. DOI: 10.15982/j.issn.2096-9287.2021.20200081
LI Kangkang, GU Defeng, AN Zicong, SONG Jianing, ZHU Jubo. Simulation and Analysis of Orbit Determination of Space Gravitational Wave Detector[J]. Journal of Deep Space Exploration, 2021, 8(2): 182-189. DOI: 10.15982/j.issn.2096-9287.2021.20200081
Citation: LI Kangkang, GU Defeng, AN Zicong, SONG Jianing, ZHU Jubo. Simulation and Analysis of Orbit Determination of Space Gravitational Wave Detector[J]. Journal of Deep Space Exploration, 2021, 8(2): 182-189. DOI: 10.15982/j.issn.2096-9287.2021.20200081

空间引力波探测器轨道确定及仿真分析

Simulation and Analysis of Orbit Determination of Space Gravitational Wave Detector

  • 摘要: 针对空间引力波探测器的精密轨道确定问题,选取LISA(Laser Interferometer Space Antenna)作为研究对象,建立了探测器的目标仿真环境,模拟生成美国深空网(Deep Space Network,DSN)和中国深空网(China Deep Space Network,CDSN)在不同测站下的测距测速数据,采用非线性加权最小二乘(Weighted Least Squares,WLS)和蒙特卡洛方法(Monte Carlo,MC)分析跟踪弧长、测轨数据类型、测站数量及其分布等因素对LISA探测器定轨精度的影响。仿真结果表明:①增加测站的定轨弧长,可有效提高轨道确定精度,当跟踪弧段达到20 d时,探测器位置确定精度可达92 m;②在现有测量精度条件下,测距信息对定轨精度的贡献较大,测距/测速组合定轨方式与仅利用测距、测速定轨相比,估计的位置精度分别提高了32.23%、99.52%;③采用多测控网定轨模式可以提高多站共视比率,有利于提高定轨精度和收敛速度,DSN/CDSN联合定轨比仅采用DSN定轨的平均位置精度提高43.73%。

     

    Abstract: Aiming at the precise orbit determination of Space gravitational wave detector, LISA(Laser Interferometer Space Antenna)is selected as the research object to establishs the target simulation environment, detect simulates the generation of the ranging and velocity measurement data at different stations by American Deep Space Network(Deep Space Network)Network(DSN) and China Deep Space Network(CDSN). The accuracy of LISA orbit determination is investigated in terms of the tracking arc length, measurement data types, also the quantity and distribution of ground stations by utilizing the Nonlinear Weighted Least Squares (WLS) and Monte Carlo(MC)methods. The simulation results show that: ① Increasing the tacking arc length can effectively improve the orbit determination precision. Moreover, the position accuracy of the estimated detector reaches 92m when the tracking arc is 20 days; ② Under the current measurement accuracy, the performance of the LISA orbit determination is considerably determined by the ranging data. The combined ranging/Doppler orbit determination method gains a growth of 32.23% and 99.52% estimating position accuracy, compared with the only ranging and only Doppler orbit determination strategies, respectively; ③ By utilizing multiple deep space networks, the common viewing rate of multi stations increases markedly, improving the accuracy and the convergence of the orbit determination. The performance of the joined DSN/CDSN orbit determination scheme is compared to the only DSN scheme by different arc lengths, with an increment of the average position accuracy of 43.73%.

     

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