全球定位系统2025，Vol.50Issue(5)：60-68,9.DOI:10.12265/j.gnss.2025093
利用eLoran信号特性反演大地电导率
Inversion of ground conductivity using eLoran signal characteristics
摘要
Abstract
Ground conductivity is an important physical parameter that reflects the earth's electrical conductivity.Low-frequency signals propagate along the earth's surface,and ground conductivity is a key factor affecting their propagation.Accurate ground conductivity helps analyze and study the propagation characteristics of low-frequency radio signals;conversely,the propagation characteristics of low-frequency radio signals can be used to inversely derive ground conductivity.This paper utilizes the characteristics of eLoran signals field strength and time delay to inversely derive ground conductivity,presenting simulation analyses and experimental results.The research findings demonstrate that using eLoran signal characteristics to invert ground conductivity is feasible,and the inversion results are reliable.The ground conductivity derived from field strength inversion is more suitable for field strength calculations,while the ground conductivity obtained from additional secondary factor(ASF)inversion is more applicable to secondary time delay calculations.Additionally,due to the complexity of signal propagation paths,the accuracy of conductivity inverted over medium to long distances is slightly lower than that over short distances.To address this,a segmented inversion approach is proposed,which will be a key focus of subsequent research efforts.关键词
增强型远程导航(eLoran)信号/二次时延(ASF)/反演/大地电导率Key words
eLoran signal/additional secondary factor(ASF)/inversion/ground conductivity分类
信息技术与安全科学引用本文复制引用
李云,徐露,华宇,燕保荣,郭伟..利用eLoran信号特性反演大地电导率[J].全球定位系统,2025,50(5):60-68,9.基金项目
四川省自然科学基金(2024NSFSC0841) （2024NSFSC0841）
