摘要
提供高精度的精密轨道产品对北斗卫星导航系统的推广应用具有重要意义。本文给出一种基于模糊度固定的北斗卫星多系统融合非差精密定轨方法,重点推导并论述模糊度固定的实现方法,结合实测数据,对其精密定轨效果进行了分析。初步分析结果表明:利用本文方法,北斗GEO、IGSO、MEO卫星三维定轨精度分别达到1.263 m、0.214 m、0.134 m,3类卫星径向定轨精度平均优于10 cm,IGSO和MEO已经基本优于5 cm;模糊度固定以后,北斗卫星三维定轨精度平均提高了21.8%,轨道切向精度改善最为明显,其中又以GEO卫星改进最大。
Precise orbit product is very important for application of BeiDou Navigation Satellite System .A method of zero‐differenced multi‐GNSS joint precise orbit determination of BeiDou satellites based on ambiguity fixing is present .The realization of ambiguity fixing is focused on .The real data is analyzed , and the results show that the three dimensional precision of GEO ,IGSO and MEO can respectively reach 1 2.63 m ,0 2.41 m and 0 1.34 m .The radi al precision of the three types of satellites can averagely be better than 10 cm ,and that of IGSO and MEO can mostly be better than 5 cm .After ambiguity fixing ,the three dimensional precision of BDS is improved 21 8.% averagely ,and the tangential precision is improved most obvi ousl y ,especi al l y for GEO .
出处
《测绘学报》
EI
CSCD
北大核心
2014年第11期1132-1138,1143,共8页
Acta Geodaetica et Cartographica Sinica
基金
中国第二代卫星导航系统重大专项(GFZX0301040308)
信息工程大学博士研究生学位论文创新基金(S201307)
关键词
北斗卫星导航系统
模糊度固定
非差精密定轨
多系统融合
激光观测数据
BeiDou navigation satellite system
ambiguity fixing
zero-difference precise orbit determina-ti on
mul ti-GNSS processi ng
SLR
