摘要: |
时间同步技术是伪卫星系统设计的关键技术之一。根据卫星共视法时间同步原理, 得
出影响共视法时间同步模型精度的各项残差, 进而对各项残差做深入分析。采用网格模型对共
视法中电离层延迟残差进行分析, 得出伪卫星相距的方向、距离以及用来共视的卫星高度角对
电离层延迟残差的影响。采用Hopfield 模型对对流层延迟残差进行分析, 得出高度角对对流层残
差项的影响, 并进行仿真分析。 |
关键词: 伪卫星 共视法 时间同步 精度分析 |
DOI: |
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基金项目: |
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Common⁃view Model in Pseudo⁃satellite Time Synchronization and Its Precision Analysis |
LI Dong⁃xin,YANG Wei⁃cai,CHANG Qing,LI Jing,YU Yuan |
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Abstract: |
Time synchronization is one of the key techniques in pseudo⁃satellite system design. According to the principle of
satellite common⁃view time synchronization, we can obtain the residual errors that affect the precision of the satellite com⁃
mon⁃view time synchronization, and an in⁃depth analysis of the residual errors is done. The ionosphere delay residual error
has been analyzed by the grid model in the common⁃view method, and it is concluded that the direction, distance between
two pseudo⁃satellites and the elevation angle of the common⁃view satellite have an important influence on the ionosphere de⁃
lay residual error. The Hopfield model of the troposphere delay residual error has been analyzed and it is concluded that the
elevation angle has influence on the residuals, and then a detail simulation analysis was made. |
Key words: Pseudo⁃satellite Common⁃view method Time synchronization Precision analysis |