星载GNSS+BDS星间链路联合的高轨卫星定轨仿真研究  

Research on high-orbit satellite orbit determination simulation with satellite-borne GNSS+BDS Inter-satellite Ka-band cooperation

作　　者：杨杰 高阳 蒋科材 李敏[1] YANG Jie;GAO Yang;JIANG Kecai;LI Min(Research Center of GNSS,Wuhan University,Wuhan 430079,China;China Academy of Space Technology(Xi’an),Xi’an 710100,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 [2]中国空间技术研究院西安分院,西安710100

出　　处：《空间电子技术》2025年第2期36-40,共5页Space Electronic Technology

基　　金：国家自然科学基金重点基金(编号:42030109);国家自然科学基金青年基金(编号:42204020)。

摘　　要：高轨卫星,仅依靠星载GNSS难以实现精密定轨,而BDS星间链路测量精度高,几何分布较好,结合星载GNSS仿真观测数据验证联合Ka的精密定轨性能,实验结果表明:相比星载GNSS,平均可视仅1颗BDS建链时,三维均方根误差从729.9 mm降低至480.0 mm,定轨精度提高34.2%。平均可视仅2颗BDS建链时,定轨三维误差降低到401.6 mm,且径向相对于GNSS均方根误差从269.8 mm降低至137.8 mm,定轨精度提高48.9%。当GNSS+全部BDS建链,三维定轨精度可达269.4 mm。BDS星间链路的引入,使得高轨卫星定轨精度提高,定轨可靠性得以增强。Precision Orbit Determination for High-Orbit Satellites Using Satellite-borne GNSS Alone is Challenging,While BDS Inter-Satellite Ka-band Measurements Exhibit High Accuracy and Favorable Geometric Distribution.Validation of Precision Orbit Determination Performance with Joint Ka-band and Satellite-borne GNSS Simulated Observations.Experimental results indicate that,compared to satelliteborne GNSS alone,the three-dimensional root mean square error decreased from 729.9 mm to 480.0 mm,resulting in a 34.2% improvement in orbit precision when only one BDS satellite is visible.With visibility of two BDS satellites,the three-dimensional orbit error decreased to 401.6 mm,and the radial root mean square error reduced from 269.8 mm to 137.8 mm relative to GNSS,leading to a 48.9% improvement in orbit precision.When GNSS is combined with all visible BDS satellites,the three-dimensional orbit precision can reach 269.4 mm.The introduction of BDS inter-satellite Ka-band measurements enhances the precision of high-orbit satellite orbit determination and increases orbit reliability.

关 键 词：高轨卫星 星载GNSS BDS星间链路 精密定轨 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计] V443