高分多模卫星星载BDS/GPS在轨数据分析与评估  

Analysis and evaluation of on-orbit data of high-resolution multi-mode spaceborne BDS/GPS

作　　者：陈高峰 张颖 刘立红 王海月 李向宇[1] 王慧聪 肖玲玉 李卫洁[3] CHEN Gaofeng;ZHANG Ying;LIU Lihong;WANG Haiyue;LI Xiangyu;WANG Huicong;XIAO Lingyu;LI Weijie(Space Star Technology Co.,Ltd.,Tianjin 300450,China;Military Representative Office of Rocket Force in Beijing Area,Beijing 102209,China;Space Star Technology Co.,Ltd.,Beijing 102209,China;Tianjin Aerospace Zhongwei Data System Technology Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]航天恒星科技有限公司,天津300450 [2]火箭军驻北京地区军事代表室,北京102209 [3]航天恒星科技有限公司,北京102209 [4]天津航天中为数据系统科技有限公司,天津300450

出　　处：《导航定位与授时》2024年第6期132-142,共11页Navigation Positioning and Timing

基　　金：国家重点研发计划(2023YFB3906504)。

摘　　要：高分多模卫星已在轨稳定运行,并使用星载BDS/GPS双频双模导航接收机实现了自主定轨功能。根据导航接收机在轨实测数据,开展了BDS模式和GPS模式下的载噪比、收星数等观测数据质量的对比分析,基于下传的原始观测数据完成了精密定轨解算,并采用内符合评估方法完成了实时定轨精度分析。经分析研究,导航接收机最高载噪比BDS模式较GPS模式高1 dB•Hz,平均可用星数BDS模式较GPS模式多0.6颗,精密定轨位置精度和速度精度BDS模式和GPS模式均在1.63~5.34 cm、0.0017~0.0046 cm/s之间,实时定轨位置精度和速度精度BDS模式和GPS模式均在3.10~4.23 m、0.00291~0.00394 m/s之间。结果表明,BDS信号与GPS信号的载噪比、可用星数和定轨精度均基本相当,表明BDS已具备为航天器用户独立提供时间、位置及速度等信息服务的能力。The high-resolution multi-mode(GFDM)satellite has been operating steadily in orbit and has achieved autonomous orbit determination capability with the spaceborne dual-frequency,dual-mode BDS/GPS navigation receiver.Based on the on-orbit test data of the navigation receiver,a quality analysis of the observation data such as carrier-to-noise ratio and number of received satellites in both BDS and GPS modes is performed.The precise orbit determination calculation is completed based on the down-transmitted original observation data,and the real-time orbit determination accuracy analysis is completed by the internal coincidence evaluation method.After analysis and research,the maximum carrier-to-noise ratio of navigation receiver BDS mode is 1 dB•Hz higher than that of GPS mode,the average number of available stars in BDS mode is 0.6 more than that of GPS mode,and the precision orbit position accuracy and velocity accuracy of BDS mode and GPS mode are between 1.63~5.34 cm and 0.0017~0.0046 cm/s.Both the BDS mode and GPS mode are between 3.10~4.23 m,0.00291~0.00394 m/s.The position accuracy and velocity accuracy of real-time orbit determination of BDS mode and GPS mode are both between 3.10~4.23 m and 0.00291~0.00394 m/s.The results show that the carrier-to-noise ratio,the number of available stars and the orbit determination accuracy of the BDS signal are basically the same as those of the GPS signal,which indicates that the Beidou navigation satellite system is capable of independently providing time,position,velocity and other information services to spacecraft users.

关 键 词：北斗卫星导航系统 导航接收机 BDS模式 GPS模式 数据质量 对比分析 

分 类 号：P228[天文地球—大地测量学与测量工程]