全球定位系统2024，Vol.49Issue(5)：103-109,7.DOI:10.12265/j.gnss.2024069
基于条件平差的网络RTK电离层改正数偏差修正
Correction of ionospheric correction deviation in network RTK based on conditional adjustment
摘要
Abstract
Aiming at the problem of low accuracy of ionospheric delay modelling in the afternoon in network RTK,a deviation correction method for ionospheric correction values based on conditional adjustment is proposed,using the condition that the theoretical closure difference of the three baselines in the triangle with double-difference ionospheric delays is 0,to adjust the ionospheric correction values obtained by modelling,and the scheme of determining the weighting array in the correction process is discussed.The experiments show that the correction algorithm can effectively improve the accuracy of ionospheric correction when the accuracy of the ionospheric correction model is not high,and at the same time,the determination of the weight array based on the ambiguity fixing of the known baselines can achieve a better correction effect,with the maximum value of the deviation of the ionospheric correction value reduced by 58.0 percent and the overall accuracy improved by 51.1 percent.关键词
网络实时动态定位(RTK)/电离层改正数/偏差修正/条件平差/VRS/GNSSKey words
network RTK/ionospheric correction/bias correction/conditional adjustment/VRS/GNSS分类
天文与地球科学引用本文复制引用
石鑫,张熙,成兵,柯元英,雷传金..基于条件平差的网络RTK电离层改正数偏差修正[J].全球定位系统,2024,49(5):103-109,7.基金项目
自然资源部第三大地测量队科技支撑项目(2023KJ01) （2023KJ01）
四川测绘地理信息局科技支撑项目(2023KJ02) （2023KJ02）
四川省测绘地理信息学会科技开放基金(CCX202320) （CCX202320）
四川省交通运输科技项目(2023-A-14) （2023-A-14）
