摘要
针对目前仅北斗全星座提供三频观测数据,而不同线性组合模型影响精密单点定位(PPP)精度和收敛速度的问题,本文着重推导了北斗三频无电离层最优组合精密单点定位数学模型,以此为基础,采用大量实测数据进行北斗双频、三频静态PPP实验。结果表明,相比于北斗双频静态PPP,北斗三频静态PPP在收敛速度和定位精度上有所提高,绝对定位精度可达2~3cm,与GPS双频精密单点定位水平相当。
At present, only the BDS provides triple frequency observation data, and dif- ferent linear combination models of observation data influence positioning accuracy and con- vergence speed of Precise Point Positioning （PPP）. This paper deduced the optimal mathe- matical model of BDS three frequency ionosphere free combination PPP, and carried out ex- periment of BDS dual-and triple frequency static PPP, using a large amount of measured da- ta. The results show that, triple frequency static PPP obviously improves the positioning ac- curacy and convergence speed, compared to the BDS dual-frequency static PPP. BDS triple frequency static PPP can reach absolute positioning accuracy of 2-3 cm, with dual-frequency GPS PPP levels.
出处
《全球定位系统》
CSCD
2017年第1期53-58,共6页
Gnss World of China
关键词
北斗卫星导航
精密单点定位
三频精密单点定位
三频线性组合
定位精度
BDS
precise point positioning （PPP）
triple frequency PPP
triple frequen- cy linear combination
positioning accuracy
