精密单点定位中附加先验电离层改正的内插方法研究  

Research on Interpolation Method of Additional Prior Ionosohere Correction in Precise Point Positioning

作　　者：张树为 陈明剑[1,2] 刘天恒 周润杨 左宗 

机构地区：[1]信息工程大学导航与空天目标工程学院,河南郑州450001 [2]北斗导航应用技术协同创新中心,河南郑州450001

出　　处：《全球定位系统》2017年第1期90-94,共5页Gnss World of China

摘　　要：在精密单点定位技术中,外部提供给接收机更多的先验信息能使其定位精度和实时性得到提高。依靠增强站网内插出流动站的电离层延迟进行非差非组合精密单点定位时,其提供的改正达到精度要求势必使待估参数减少,模型强度变强,定位精度高。本文对比了内插电离层改正的精度,探讨了内插模型,提出了平面双样条内插模型。实验结果表明:在内插模型合适的情况下,电离层延迟精度可达到精密单点定位的要求。The higher level of positioning accuracy and real-time performance would be reached if receivers can achieve more prior information in the precise point positioning. In the undifferenced uncombined PPP, if the ionosphere delays supplied by augmentation stations can cover the precision demand, the estimated parameters must be less, the model must be more robust, the position precision must get better. In this paper, interpolation models has been discussed, a comparison in accuracy of interpolation of atmospheric correction has been done. ,a new method named planar double spline curve interpolation has been delivered. The experimental results show that when the interpolation model is appropriate, the precision level of interpolation correction can meet the requirements of PPP.

关 键 词：电离层 非差非组合 平面双样条均值内插 精密单点定位 

分 类 号：P228.4[天文地球—大地测量学与测量工程]