北斗三号卫星精密定轨中的光压模型研究  

A Study of Solar Radiation Pressure Model in BDS-3 Precise Orbit Determination

作　　者：李鹏杰 张捍卫[1] 谢孟辛 赵东方 LI Peng-jie;ZHANG Han-wei;XIE Meng-xin;ZHAO Dong-fang(School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo 454000)

机构地区：[1]河南理工大学测绘与国土信息工程学院,焦作454000

出　　处：《天文学报》2023年第4期125-137,共13页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(42074002、41931075)资助。

摘　　要：对于在轨运行的BDS(BeiDou Navigation Satellite System)卫星,太阳光压是作用在卫星上主要的非引力摄动.受多种因素的影响,太阳光压摄动力难以精确建模,是BDS卫星精密定轨和轨道预报过程中重要的误差来源.由于ECOMC(Empirical CODE Orbit Model 1 and 2 Combined)模型兼顾了ECOM1(Empirical CODE Orbit Model 1)和ECOM2(Empirical CODE Orbit Model 2)模型的特点,在模型中引入了较多的待估参数,使得参数之间存在强相关性.针对ECOMC模型的这一缺陷,文中收集了2019年1月至2022年4月武汉大学分析中心提供的BDS-3卫星精密星历,采用动力学轨道拟合方法得到了ECOMC模型的13个光压参数.通过对该模型的光压参数进行时间序列分析,分别给出了BDS-3 IGSO(Inclined Geosynchronous Orbit)和MEO(Medium Earth Orbit)卫星光压模型的参数选择策略.并利用轨道拟合和轨道预报试验,验证了光压模型参数选择策略的合理性.结果表明,采用改进型ECOMC模型进行BDS-3 IGSO和MEO卫星轨道拟合的效果最佳,同时,也能够提升BDS-3 IGSO和MEO卫星中长期轨道预报的精度.For the BDS(BeiDou Navigation Satellite System)satellites,the solar radiation pressure is the major non-gravitational perturbation the satellites suffer.Due to the influence of multiple factors,accurate modeling the solar radiation pressure acting on these satellites is difficult to accomplish.The solar radiation pressure perturbation is an essential source of error in the precise orbit determination(POD)and orbit prediction processes of the BDS satellites.As the ECOMC(Empirical CODE Orbit Model 1 and 2 Combined)model adopts the advantageous features of the ECOM1(Empirical CODE Orbit Model 1)model and the ECOM2(Empirical CODE Orbit Model 2)model,a greater number of parameters have been introduced into the model,leading to strong correlation between the ECOMC model parameters.In response to the deficiency of the ECOMC model,the authors collected the BDS-3 satellite precise ephemeris data that was provided by Wuhan University(WHU)from January 2019 to April 2022.And by these ephemeris data,the ECOMC model's 13 parameters were obtained through the dynamic orbit fitting method.By conducting these time sequence diagrams analysis of the ECOMC model parameters,this thesis affords the selection strategies of the solar radiation pressure parameters of the ECOMC model for BDS-3 inclined geosynchronous orbit(IGSO)and medium earth orbit(MEO)satellite.And the rationality of the selection strategies of the solar radiation pressure parameters for the ECOMC model was verified,by orbit fitting and orbit prediction experiments.The results show that using the improved ECOMC model gains the best orbit fitting effects for BDS-3 IGSO and MEO satellite and can also enhance the accuracy of medium and long-term orbit prediction of BDS-3 IGSO and MEO satellite.

关 键 词：太阳光压 精密定轨 BDS-3 轨道拟合 轨道预报 

分 类 号：P128[天文地球—天体测量]