测绘学报

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GPS天线相位中心校正对星载低轨卫星精密定轨的影响研究

胡志刚   

  1. 武汉大学信息学部测绘学院
  • 收稿日期:2011-03-23 修回日期:1900-01-01 出版日期:2011-05-05 发布日期:2015-06-24
  • 通讯作者: 胡志刚

Research on Impact of Phase Pattern on LEO POD

  • Received:2011-03-23 Revised:1900-01-01 Online:2011-05-05 Published:2015-06-24

摘要: 到目前为止,执行各种低轨卫星任务的官方在公布定轨结果的同时并没有公布星载接收机的天线相位中心校正(PCV)信息,而PCV误差是星载GNSS精密定轨必须考虑的主要误差源之一,本文以GRACE卫星任务为例研究PCV误差对低轨卫星精密定轨的影响,利用GPS观测数据直接估计与相位误差有关的PCO和PCV参数,然后利用SLR和KBR数据进行了定轨 结果评定。结果表明,考虑PCO和PCV误差的精密定轨其精度有较大的提高。

Abstract: Up to now, all the LEO mission officials have published precision orbit determination results without phase pattern correction information. In fact, phase pattern error is one of the main sources of error for POD. In this paper, the phase pattern error model is established and based on GRACE real data, the PCV is gained directly from estimated parameters. Finally, some evaluations are conducted with KBR and SLR,the experiment results show that the POD improved greatly when estimated PCV.