中文摘要：

针对半经验电离层模型NeQuick模型中NeQuick2模型研究较少的现状,文章介绍了NeQuick2模型的算法,分析了NeQuick2模型与NeQuick1模型的差别：利用低、中、高纬度测站的全球定位系统观测数据获得的斜路径电子总合量作为参考,对NeQuick2模型和NeQuick1模型进行了精度对比分析.结果表明NeQuick2模型的精度显著优于NeQuick1模型,平均改善约4 TECU.

英文摘要：

Aiming at the insufficiency of studying NeQuick2 model of the semi-empirical ionospheric model NeQuick, the paper introduced the NeQuick2 algorithm, and analyzed the difference between NeQuick2 model and NeQuickl model： the slant total electron content values that are calculated using GPS observations at stations from low, middle and high latitude areas were used as references to assess the accuracy of NeQuick2 model and NeQuickl model. Results indicated that the accuracy of the NeQuick2 model would be significantly higher than that of the NeQuickl model with an improvement of about 4 TECU.