摘要
为了增强定位精度,需不断提高电离层延迟模型精度,格网电离层模型由于修正效果佳而被广泛应用。针对格网模型构建过程中网格节点处电离层延迟的插值问题,提出了分片线性插值法计算用户端穿透点的电离层延迟。基于格网模型的特征,在同一模型中应用不同的插值算法进行电离层延迟误差的对比,并检验格网电离层垂直延迟修正误差(GIVE)。结果表明,使用分片线性插值法计算的穿透点电离层延迟值更接近于实测数据,GIVE值更小,从而验证了该插值方法计算用户端穿透点的电离层延迟的高准确度。
In order to enhance the positioning accuracy,the accuracy of the ionospheric delay model needs to be continuously improved.The grid ionosphere model is widely used because of its good correction effect.In order to solve the problem of interpolation of ionospheric delays at the grid nodes during the grid model construction process,a piecewise linear interpolation method was proposed to calculate the ionospheric delay at the user end penetrating points.Based on the characteristics of the grid model,different interpolation algorithms were applied in the same model to compare the ionospheric delay errors and to verify grid ionosphere vertical delay correction error(GIVE).The results show that the ionospheric delay value of the penetrating point calculated by the piecewise linear interpolation method is closer to the measured data,and the GIVE value is smaller,thus verifying that the interpolation method calculates the high ionospheric delay accuracy of the user end penetrating point.
作者
于耕
郝俊
赵龙
YU Geng;HAO Jun;ZHAO Long(School of Civil Aviation,Shenyang Aerospace University,Shenyang 110136,China;School of Electronic Information Engineering,Shenyang Aerospace University,Shenyang 110136,China)
出处
《科学技术与工程》
北大核心
2018年第26期141-146,共6页
Science Technology and Engineering
基金
国家自然科学基金(U1433115
61671141)
辽宁省教育厅系列项目基金(L201723)资助
