风云三号C卫星星载GPS/BDS实时定轨分析  

Analysis on the Real-Time Orbit Determination for FY3C Satellite Using Space-Borne GPS/BDS

作　　者：凌三力 王甫红[1,2] 张万威 LING Sanli;WANG Fuhong;ZHANG Wanwei(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;Collaborative Innovation Center of Geospatial Technology,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]地球空间信息技术协同创新中心,湖北武汉430079

出　　处：《测绘地理信息》2021年第3期17-20,共4页Journal of Geomatics

基　　金：国家自然科学基金(91638203)。

摘　　要：随着北斗卫星导航系统(BeiDou navigation satellite system, BDS)的建设与运行,低轨卫星开始搭载GPS/BDS双系统接收机以实现卫星轨道确定。利用风云三号C(FengYun-3C,FY3C)卫星星载GPS/BDS双频伪距与载波相位观测数据,设置4种仿真试验方案,分别进行星载GPS/BDS在轨实时定轨数据处理,重点进行BDS观测数据对伪距实时定轨和载波相位实时定轨的精度影响分析和算法耗时分析。结果表明,采用伪距观测值,可获得1.0 m的位置精度和1.0 mm/s的速度精度;采用载波相位观测值,可获得0.3 m的位置精度和0.3 mm/s的速度精度,且引入BDS观测值后,伪距实时定轨精度降低,相位实时定轨精度有所改善。With the construction and operation of the BeiDou navigation satellite system(BDS), low-orbit satellites start to be equipped with GPS/BDS dual-model receivers to realize orbit determination of satellites. Based on space-borne GPS/BDS dual-frequency pseudorange and carrier phase measurements of FengYun-3 C(FY3 C) satellite, four simulation test schemes are set up to process the in-orbit real-time orbit determination data of GPS/BDS. The precision influence of BDS observation data on pseudorange real-time orbit determination and carrier phase real-time orbit determination and the algorithm time-consuming analysis are mainly analyzed. The results show that the position precision and the velocity precision are 1.0 m and 1.0 mm/s, respectively, when using pseudorange measurements. The position precision is 0.3 m and the velocity precision is 0.3 mm/s when using carrier phase measurement. After introducing BDS measurement, the accuracy of the pseudorange real-time orbit determination is reduced and the accuracy of the carrier phase real-time orbit determination is improved.

关 键 词：低轨卫星 星载GPS/BDS(BeiDou navigation satellite system) 实时定轨 风云三号C卫星 

分 类 号：P228[天文地球—大地测量学与测量工程]