具有Klobuchar模型背景场的电离层插值方法研究

Study of ionosphere interpolation method by using Klobuchar model as background field

为了提高网络RTK中电离层插值的精度,提出一种具有背景场的电离层插值方法:在建立电离层模型时将Klobuchar模型作为背景场,结合基站实测的电离层数据,采用基于距离的线性内插模型最终确定流动站电离层信息。这种方法利用了背景场所提供的电离层时空变化特征,可提高电离层插值的精度。实验结果表明,在目前典型的基站间距条件下,该方法能将电离层插值精度提高10%左右,同时将网络RTK流动站定位精度也提高约10%。

In order to improve the accuracy of ionospheric interpolation in the network RTK, the paper proposed a method of ionospheric interpolation by using background filed： Klobuchar model was used as background field when building the iono- spheric model, combined with ionospheric data measured by the base station, and the linear interpolation model based on dis- tance was utilized to determine the ionospheric information of the rover station finally. The method could improve the accuracy of ionosphere interpolation by using the spatio-temporal change information of ionosphere obtained from the background field. Experimental result showed that with the current typical base station distance, this method could improve the ionosphere interpolation precision by about 10%, at the meantime the network RTK rove location accuracy could be also increased about 10%.