基于不同轨道类型BDS卫星的载波相位共视时间传递分析

Common-view time transfer based on carrier phase observations of BDS satellites with different orbit types

基于北斗卫星导航载波相位共视(BDS CP(CV))时间传递模型,使用IGS多GNSS试验先导项目(MGEX)提供的精密轨道和钟差产品,研究分析GEO,IGSO和MEO 3种北斗在轨卫星进行时间传递的不确定度。实验结果表明:相对于双向卫星比对结果和光纤比对结果,基于IGSO载波相位时间传递结果的标准差较好,相对于双向卫星比对结果,西安—长春观测数据比对结果的标准差中IGSO较好,可以达到0.39 ns;相对于光纤比对结果,西安—临潼观测数据比对结果的标准差中IGSO较好,可以达到0.18 ns;基于GEO和IGSO的载波相位时间传递结果的稳定度比基于MEO的较好。

Based on the BDS CP(CV)(carrier phase common-view)time transfer model and the precise orbit and clock products provided by the MGEX(multi-GNSS experiment),the uncertainty of time transfer of GEO,IGSO and MEO are presented in this paper.Experimental results show that the standard deviation of BDS CP(CV)time transfer of IGSO is better than that of GEO and MEO compared with the results of two-way satellites time transfer and fiber link time transfer.The BDS CP(CV)standard deviation of IGSO is 0.39 ns between Xi’an and Changchun compared with the results of two-way satellites time transfer,and the standard deviation of IGSO is 0.18 ns between Xi’an and Lintong compared with the results of fiber link time transfer.The stability of GEO and IGSO using carrier phase time transfer are better than MEO compared with the results of two-way satellites time transfer and fiber link time transfer.