北京测绘2026，Vol.40Issue(4)：567-574,8.DOI:10.19580/j.cnki.1007-3000.2026.04.023
磁暴期间铁路带状CORS网的定位性能分析
Analysis of positioning performance of railway linear CORS network during geomagnetic storms
摘要
Abstract
To study the positioning performance variation of the railway continuously operating reference station(CORS)during magnetic storms,this paper utilized data collected from a linear CORS network of a railway in Southwest China dur-ing a magnetic storm on December 1,2023.It conducted a comparative analysis of three ionospheric interpolation models,namely the linear interpolation method(LIM),the distance-based linear interpolation method(DIM),and the least squares constant(LSC)method,and an experimental evaluation was carried out from three core dimensions:baseline double-difference ionospheric delay,the accuracy of different interpolation models,and the positioning accuracy of stations both inside and outside the network.The results show that magnetic storms cause abnormal activity in double-difference iono-spheric delays,which can lead to the failure of baseline resolution in severe cases.Among the three interpolation models,the DIM model exhibits relatively poor accuracy,with only 38.52%of its double-difference ionospheric interpolation values hav-ing a deviation of less than 1 cm.In addition,the positioning accuracy of stations outside the network experiences a more sig-nificant decline compared to those inside during magnetic storms,with the horizontal accuracy exceeding 3 cm and the verti-cal accuracy reaching approximately 4.8 cm.The research findings of this paper can provide certain data support and techni-cal references for the subsequent optimization of positioning algorithms under magnetic storm conditions and the exploration of ionospheric model corrections suitable for railway linear CORS networks.关键词
连续运行参考站/地磁暴/电离层延迟/线性内插模型/定位精度Key words
continuously operating reference station/geomagnetic storm/ionospheric delay/linear interpolation model/positioning accuracy分类
天文与地球科学引用本文复制引用
唐俊..磁暴期间铁路带状CORS网的定位性能分析[J].北京测绘,2026,40(4):567-574,8.基金项目
中铁第四勘察设计院集团有限公司科技研发计划(KY2024018S) （KY2024018S）
