北斗三号卫星GNSS/SLR数据联合精密定轨

Precise orbit determination of BDS-3 satellites based on GNSS/SLR data

为了进一步提升北斗卫星定轨技术的精度,研究引入不同类型的观测数据联合全球导航卫星系统(GNSS)观测数据对提升北斗卫星轨道产品的精确度的影响:在GNSS观测数据的基础上引入卫星激光测距(SLR)的观测数据对北斗三号卫星进行联合轨道确定,并采用激光检核轨道残差和将解算结果与武汉大学(WHU)提供的精密星历产品进行轨道互差2种方法,讨论引入激光测距观测值对提升北斗三号卫星轨道精度的作用。实验结果表明,引入SLR观测数据之后,北斗三号系列卫星中的中圆地球轨道(MEO)卫星的轨道精度有所提升。

In order to further improve the accuracy of BeiDou navigation satellite system(BDS)orbit determination technology,the paper studied the impact of introducing different types of observations data joint global navigation satellite system(GNSS)observation data on improving the accuracy of Beidou satellite orbit products:On the basis of GNSS observation data,the observation data of satellite laser ranging(SLR)were introduced to determine the joint orbit of the BDS-3 series satellites;and two methods of checking the orbit residuals with laser and orbital correlation between the solution results and the precise ephemeris products provided by Wuhan University(WHU)were used to discuss the effect of introducing laser ranging observations on improving the orbit accuracy of Beidou-3 satellites.Experimental result showed that after introducing SLR observation data,the orbit accuracy of medium Earth orbit(MEO)satellites in the BDS-3 series satellites could be improved.