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地基北斗GEO卫星直反信号功率测量偏差分析

阮宏梁 洪学宝 王永宁 汉牟田 杨东凯

阮宏梁,洪学宝,王永宁,等. 地基北斗GEO卫星直反信号功率测量偏差分析[J]. 北京航空航天大学学报,2023,49(4):825-831 doi: 10.13700/j.bh.1001-5965.2022.0080
引用本文: 阮宏梁,洪学宝,王永宁,等. 地基北斗GEO卫星直反信号功率测量偏差分析[J]. 北京航空航天大学学报,2023,49(4):825-831 doi: 10.13700/j.bh.1001-5965.2022.0080
RUAN H L,HONG X B,WANG Y N,et al. Power measurement deviations of direct and reflected signals from BDS GEO satellites in ground-based GNSS-R applications[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(4):825-831 (in Chinese) doi: 10.13700/j.bh.1001-5965.2022.0080
Citation: RUAN H L,HONG X B,WANG Y N,et al. Power measurement deviations of direct and reflected signals from BDS GEO satellites in ground-based GNSS-R applications[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(4):825-831 (in Chinese) doi: 10.13700/j.bh.1001-5965.2022.0080

地基北斗GEO卫星直反信号功率测量偏差分析

doi: 10.13700/j.bh.1001-5965.2022.0080
基金项目: 浙江省基础公益研究计划(LGN19D040001)
详细信息
    通讯作者:

    E-mail:Joyce_hong2008@yeah.net

  • 中图分类号: V19;P237

Power measurement deviations of direct and reflected signals from BDS GEO satellites in ground-based GNSS-R applications

Funds: Zhejiang Basic Public Welfare Research Project (LGN19D040001)
More Information
  • 摘要:

    针对接收天线方向性造成的北斗地球同步轨道(GEO)卫星直反信号功率测量偏差进行研究。给出地基场景下实际天线接收的直反信号及其功率表达式,讨论天线方向性造成的北斗GEO卫星直反信号功率测量相对偏差,设置具体观测场景进行仿真分析。理论与仿真结果表明:具体场景和时刻下的北斗GEO卫星直反信号功率测量偏差为固定偏差,由天线对干扰信号的抑制性能、天线架设高度和反射面介电常数共同决定;相对偏差的大小随着天线对干扰信号抑制性能的增强而减小,随着天线架设高度的变化在某一范围内波动,也会随着反射面介电常数的变化而变化。

     

  • 图 1  不同高度角下的天线抑制比

    Figure 1.  Antenna rejection ratios under different elevation angle

    图 2  不同卫星高度角和天线相位中心高度下的直反信号功率测量相对偏差情况

    Figure 2.  Relative deviations of direct and reflected signals power measurements under different elevation angle and antenna height

    图 3  不同卫星高度角和反射面介电常数下的直射信号功率测量偏置偏差和最大余弦偏差情况

    Figure 3.  Offset deviations and maximum-cosine deviations of direct signal power measurements under different elevation angle and antenna height

    图 4  不同卫星高度角和反射面介电常数下的反射信号功率测量偏置偏差和最大余弦偏差情况

    Figure 4.  Offset deviations and maximum-cosine deviations of reflected signal power measurements under different elevation angle and antenna height conditions

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出版历程
  • 收稿日期:  2022-02-18
  • 录用日期:  2022-09-18
  • 网络出版日期:  2022-11-08
  • 整期出版日期:  2023-04-30

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