北斗卫星多天轨道合成方法及其精度分析

发布时间：2018-03-17 07:15

本文选题：北斗卫星导航系统　切入点：精密定轨　出处：《测绘学报》2016年10期 　论文类型：期刊论文

【摘要】：目前,北斗卫星多天解轨道主要是通过常规的数据累积解算获得,处理效率较低。此外,由于开通运行不久,北斗卫星力学模型尚未完善,限制了多天解轨道精度的进一步提高。针对以上问题,本文提出了附加伪随机脉冲的北斗卫星多天轨道合成方法,利用法方程叠加实现北斗卫星多天轨道合成,可有效提高轨道解算效率。同时,利用伪随机脉冲对力学模型的补偿作用,进一步提高了多天轨道合成的精度水平。实测数据分析表明:在多天轨道合成中,单天边界附加伪随机脉冲对北斗卫星轨道精度有明显改进作用。其中,3类卫星切向、法向轨道精度的改善程度大于径向,GEO和IGSO卫星轨道精度的提高幅度大于MEO卫星。一定范围内,随着定轨弧段的增长,北斗卫星定轨精度能够得到不同程度的改善,且主要表现在轨道切向。
[Abstract]:At present, the multi-day solution orbit of Beidou satellite is mainly obtained by conventional data accumulation calculation, and the processing efficiency is relatively low. In addition, due to the short operation of Beidou satellite, the mechanical model of Beidou satellite has not been perfected. In order to solve the above problems, a method of Beidou satellite multi-day orbit synthesis with pseudorandom pulse is proposed, which can be used to synthesize Beidou satellite's multi-day orbit by using the superposition of normal equation. At the same time, using pseudorandom pulse to compensate the mechanical model, the precision level of multi-day orbit synthesis is further improved. The analysis of measured data shows that: in multi-day orbital synthesis, The orbit accuracy of Beidou satellite is obviously improved by adding pseudorandom pulse to single day boundary. The improvement of normal orbit accuracy is greater than that of radial geo and IGSO satellites. In a certain range, with the increase of orbit determination arc, the orbit determination accuracy of Beidou satellite can be improved to some extent. And mainly in the tangential direction of the orbit.
【作者单位】：信息工程大学导航与空天目标工程学院;
【基金】：中国第2代卫星导航系统重大专项(GFZX0301040308)~~
【分类号】：P228.4

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