联合SLR的BDS精密定轨光压模型影响与分析  

Influence and analysis of different solar radiation pressure models in precise orbit determination using combined BDS and SLR observations

作　　者：戴金倩 戴小蕾[1] 彭亚权 楼益栋[1] DAI Jinqian;DAI Xiaolei;PENG Yaquan;LOU Yidong(Research Center of GNSS,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《导航定位学报》2023年第5期1-11,共11页Journal of Navigation and Positioning

基　　金：国家重点研发计划项目(2021YFC3000501);湖北省重点研发计划项目(2022BAA054)。

摘　　要：围绕联合卫星激光测距(SLR)数据的北斗卫星导航系统(BDS)精密定轨中光压模型选取和精化问题,分析了不同光压模型对轨道精度的影响,包括ECOM1、ECOM2以及混合光压模型。采用125个全球GNSS测站和23个SLR测站265天观测数据进行联合定轨,从SLR检核、轨道边界不连续性以及轨道预报三方面对定轨精度进行分析,结果表明:联合定轨均能显著提高轨道的SLR检核精度,其中采用混合光压模型时精度最高。采用ECOM1和ECOM2时,联合SLR观测值定轨降低了BDS卫星计算轨道和预报轨道的精度,采用混合模型时BDS卫星轨道预报精度略有提升。综合外符合和内符合精度,建议在联合SLR观测数据进行BDS卫星精密定轨时采用混合光压模型。Based on the selection and refinement of the solar radiation pressure(SRP)model in the precision orbit determination using combined global navigation satellite system(GNSS)and satellite laser ranging(SLR)observations,the effects of different SRP models on the accuracy of combined precision orbit determination were analyzed.In addition to two empirical CODE orbit models(ECOM)ECOM1 and ECOM2,a hybrid SRP model were included,in which BeiDou-2 navigation satellite system(BDS-2)satellite adopted ECOM1 with the thermal radiant pressure(TRP)model and BeiDou-3 navigation satellite system(BDS-3)satellite adopted ECOM1 with the box wing(BW)model.The data(265 days)from 125 global GNSS stations and 23 SLR stations were used for combined precision orbit determination.The accuracy of orbit determination was analyzed from SLR validation,orbit boundary discontinuity and orbit prediction.The results showed that the combined orbit determination could significantly improve the accuracy of accuracy of SLR validation,and the accuracy was highest when the hybrid SRP model was used.When using ECOM1 and ECOM2,orbit determination with GNSS and SLR observation values reduced the accuracy of calculation orbit and forecast orbit of BeiDou satellites,while the accuracy of forecast orbit of BeiDou satellites were slightly improved when using the hybrid SRP model.Based on the analysis results of the accuracy,it is suggested to use the hybrid SRP model in the BeiDou satellites precision orbit determination.

关 键 词：北斗卫星导航系统(BDS) 卫星激光测距(SLR) 联合精密定轨 光压(SRP)模型 精度分析 

分 类 号：P228[天文地球—大地测量学与测量工程]