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.
出处
《全球定位系统》
CSCD
2017年第1期90-94,共5页
Gnss World of China
