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BDS双频载波阶段多路径半球地图模型及其在实时变形监测中的应用.

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  • 1School of Environmental and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China.

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概括

本研究引入了一种新方法,以减少 BeiDou 导航卫星系统 (BDS) 在变形监测中的多路径错误. 该技术有效地减轻了各种卫星类型的错误,提高了坐标精度和模两可的固定率.

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这是BDS BDS的意思.变形监测 变形监测 变形监测 变形监测多路径的多路径.多路径半球地图单一差异剩余的剩余值.

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科学领域:

  • 地理学工程 工程地质学
  • 卫星导航系统 卫星导航系统
  • 地质测量是指地质测量.

背景情况:

  • 在北斗卫星导航系统 (BDS) 监控中,多路径延迟错误是显著的,并且受到环境的影响.
  • 现有的算法很难有效地缓解来自各种BDS卫星轨道 (GEO,IGSO,MEO) 的多路径错误.
  • 双差观察模型不足以消除这些复杂的错误.

研究的目的:

  • 为BDS真实变形监测提出一种新的双频多路径误差减少方法.
  • 为了应对考虑各种BDS卫星轨道类型的多路径误差缓解的挑战.
  • 通过使用BDS提高变形监测的准确性和可靠性.

主要方法:

  • 基于"零平均值"假设的单个卫星误差残余的提取.
  • 开发一个针对不同BDS卫星轨道 (GEO,IGSO/MEO) 量身定制的双频多路径半球地图模型,以优化网格密度.
  • 该模型在不同的轨道和频率上用于消除多路径错误.

主要成果:

  • 在观察和坐标领域有效消除低频多路径延迟错误.
  • 实现的校正后精度:水平坐标为1.7mm,高度坐标为4.6mm.
  • 显著的改进:水平坐标精度增加了50%,高度坐标精度增加了60%,模糊度增加了5-7%.

结论:

  • 拟议的方法有效地减少了各种卫星轨道的BDS多路径错误.
  • 该技术大大提高了变形监测坐标的精度.
  • 证明了基于BDS的变形监测的提高准确性和可靠性.