全球定位系统2025，Vol.50Issue(6)：53-61,9.DOI:10.12265/j.gnss.2025110
大高差边坡RTK对流层延迟模型研究
Tropospheric delay modeling for RTK positioning in slopes with large height differences
摘要
Abstract
In GNSS slope monitoring,large height differences between reference and monitoring stations increase relative tropospheric delay errors,which severely limit the vertical accuracy of real time kinematic(RTK)positioning.To address this issue,an improved regional tropospheric model was developed.The model utilized high-precision zenith tropospheric delay(ZTD)model data from the reference and monitoring stations to establish a cubic polynomial relationship between ZTD and station height,while also accounting for seasonal variations.A coastal slope with significant elevation differences was selected as the study site to validate the model.Experimental results show that the proposed model in this paper significantly improves vertical positioning accuracy in the up component,with enhancements of approximately 15%and 8%compared with the Saastamoinen and Global Pressure and Temperature 3(GPT3)models,respectively.These findings demonstrate that the model effectively mitigates tropospheric errors under large height-difference conditions and provides a practical solution for GNSS-based slope monitoring.关键词
边坡监测/实时动态差分(RTK)定位精度/大高差/对流层延迟/天顶对流层延迟(ZTD)建模Key words
slope monitoring/RTK positioning accuracy/large height differences/tropospheric delay/ZTD modeling分类
天文与地球科学引用本文复制引用
赵兴旺,杨优,吴佳友,曹稳,陈健,刘超..大高差边坡RTK对流层延迟模型研究[J].全球定位系统,2025,50(6):53-61,9.基金项目
安徽省自然科学基金(2208085MD101) （2208085MD101）
