TriP软件非差几何法精密定轨精度分析
Analysis of Undifferenced Kinematic POD for LEOs Using TriP
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摘要: 以TriP软件作为非差定轨解算的软件,通过设置不同的截止高度角和采用不同的定权策略,解算了部分GRACE卫星的星载接收机实测数据,通过结果分析得到了较优的截止高度角和定权函数估计策略。利用TriP软件采用较优的估计策略解算得到了4个月的GRACE卫星定轨结果,将其与JPL中心提供的轨道进行了对比分析。结果表明,TriP软件的几何学定轨精度为5～6 cm,与目前国内外几何学定轨精度在同一量级。Abstract: In this paper,zero-difference kinematic precise orbit determnation method is adapted for GRACE by using TriP software.Considering the effect of data quality,some observational data of GRACE were solved to obtain appropnate catoff elevation and weighting stategy.Using the optimal strategy,we processed four months observational data of GRACE and compared the orbits with the products provided by JPL.The results indicate that the accuracy of orbit determnation of TriP reaches 5-6 cm,which is at the same level of national and international studies.
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