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高轨航天器GNSS信号传播链路建模与强度分析

柴嘉薪 王新龙 俞能杰 王盾 李群生

柴嘉薪, 王新龙, 俞能杰, 等 . 高轨航天器GNSS信号传播链路建模与强度分析[J]. 北京航空航天大学学报, 2018, 44(7): 1496-1503. doi: 10.13700/j.bh.1001-5965.2017.0502
引用本文: 柴嘉薪, 王新龙, 俞能杰, 等 . 高轨航天器GNSS信号传播链路建模与强度分析[J]. 北京航空航天大学学报, 2018, 44(7): 1496-1503. doi: 10.13700/j.bh.1001-5965.2017.0502
CHAI Jiaxin, WANG Xinlong, YU Nengjie, et al. Modeling and intensity analysis of GNSS signal link for high-orbit spacecraft[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(7): 1496-1503. doi: 10.13700/j.bh.1001-5965.2017.0502(in Chinese)
Citation: CHAI Jiaxin, WANG Xinlong, YU Nengjie, et al. Modeling and intensity analysis of GNSS signal link for high-orbit spacecraft[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(7): 1496-1503. doi: 10.13700/j.bh.1001-5965.2017.0502(in Chinese)

高轨航天器GNSS信号传播链路建模与强度分析

doi: 10.13700/j.bh.1001-5965.2017.0502
基金项目: 

国家自然科学基金 61673040

国家自然科学基金 61233005

航空科学基金 2015ZC51038

天地一体化信息技术国家重点实验室开放基金 2015-SGIIT-KFJJ-DH-01

详细信息
    作者简介:

    柴嘉薪  女, 硕士研究生。主要研究方向:卫星导航、组合导航

    王新龙  男, 博士, 教授, 博士生导师。主要研究方向:惯性导航、卫星(GPS)导航、天文导航、地磁导航、景象匹配导航、组合导航与信息融合、初始对准技术及精确制导技术

    通讯作者:

    王新龙, E-mail:xlwon@163.com

  • 中图分类号: V249.32+8

Modeling and intensity analysis of GNSS signal link for high-orbit spacecraft

Funds: 

National Natural Science Foundation of China 61673040

National Natural Science Foundation of China 61233005

Aeronautical Science Foundation of China 2015ZC51038

Open Source of National Key Laboratory of Information Technology Integration 2015-SGIIT-KFJJ-DH-01

More Information
  • 摘要:

    在高轨环境下,由于卫星信号传播链路复杂、损耗衰减较大、信号强度不均匀给全球导航卫星系统(GNSS)应用带来新问题。本文建立了GNSS信号从发射端到高轨航天器接收终端的传播链路模型。通过全链路模拟和等价增益仿真,得到了高轨航天器接收信号强度的分布规律。在此基础上,比较分析了GNSS双星座、三星座和四星座联合导航系统的可用性,为高轨航天器GNSS信号特性分析、多模接收机的灵敏度选择、捕获跟踪算法的设计等工程应用提供理论参考。

     

  • 图 1  高轨航天器GNSS信号传播示意图

    Figure 1.  Schematic of GNSS signal propagation of high-orbit spacecraft

    图 2  高轨航天器GNSS信号传播链路示意图

    Figure 2.  Schematic of GNSS signal propagation link of high-orbit spacecraft

    图 3  GNSS信号传播大气损耗示意图

    Figure 3.  Schematic of atmospheric loss in GNSS signal propagation

    图 4  GPS Block IIR L1波段发射天线增益方向图

    Figure 4.  Directional diagram of gain of GPS Block IIR L1 band transmitting antenna

    图 5  GPS信号传播损耗方向图

    Figure 5.  Directional diagram of GPS signal transmitting attenuation

    图 6  GPS接收机等价增益图

    Figure 6.  Equivalent gain of GPS receiver

    图 7  GEO航天器接收终端GNSS信号强度统计

    Figure 7.  GNSS signal intensity statistics of GEO spacecraft receiving terminal

    图 8  HEO航天器接收终端GNSS信号强度统计

    Figure 8.  GNSS signal intensity statistics of HEO spacecraft receiving terminal

    表  1  HEO航天器轨道参数

    Table  1.   Orbital parameters of HEO spacecraft

    参数 数值
    半长轴/km 36 286
    离心率 0.796 8
    轨道倾角/(°) 6.04
    升交点赤经/(°) 68
    近地点幅角/(°) 180
    下载: 导出CSV

    表  2  GEO航天器可定位弧段百分比

    Table  2.   Percentage of GEO spacecraft positioning arc

    接收机灵敏度/dBW 三星座联合(≥6颗) 双星座联合(≥5颗) GNSS四星座联合(≥7颗)
    GPS/GLONASS BDS/GLONASS BDS/GPS GPS/BDS/GLONASS
    -170 40.95 80.24 85.89 90.31 98.09
    -171 73.06 89.55 95.06 97.05 100
    -172 79.69 98.92 99.54 99.43 100
    -173 87.30 99.14 99.65 99.77 100
    -174 96.75 100 100 100 100
    -175 98.01 100 100 100 100
    -176 98.59 100 100 100 100
    -177 100 100 100 100 100
    下载: 导出CSV

    表  3  HEO航天器可定位弧段百分比

    Table  3.   Percentage of HEO spacecraft positioning arc

    接收机灵敏度/dBW 双星座联合(≥5颗) 三星座联合(≥6颗) GNSS四星座联合(≥7颗)
    GPS/GLONASS BDS/GLONASS BDS/GPS GPS/BDS/GLONASS
    -175 79.08 86.79 85.70 90.66 99.07
    -176 81.50 89.23 88.37 93.61 99.37
    -177 86.50 92.92 92.82 97.47 99.65
    -178 90.11 95.29 94.65 98.78 99.68
    -179 93.81 97.87 96.97 99.06 99.83
    -180 97.47 98.69 98.45 99.30 100
    -181 97.47 98.70 98.45 99.99 100
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-07-25
  • 录用日期:  2017-10-27
  • 刊出日期:  2018-07-20

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