Ne Quick2电离层改正模型的性能评估

摘要

NeQuick2 is introduced which is improved from NeQuick1 .The slant total electron content (STEC) values are calculated from GPS observations in the cases of different satellite cutoff angles and then they are used as reference to evaluate the NeQuick2 model .The NeQuick2 model is compared with the commonly‐used IRI (International Reference Ionosphere) and Klobuchar models .The results indicate that the standard deviations of the STEC differences between NeQuick2‐derived and measured values remain within 15TECU and the stability of NeQuick2 are significantly better than the IRI and Klobuchar models .%NeQuick2电离层改正模型是在NeQuick1模型基础上改进而来的。利用GPS实测观测值在不同卫星截止高度角情况下获得的斜路径总电子含量作为参考，对该电离层模型性能进行评价，并与常用的国际参考电离层和Klobuchar电离层模型进行比较。结果表明，NeQuick2模型获得的斜向总电子含量与实测差值的标准差保持在15TECU以内，其稳定性显著优于国际参考电离层和Klobuchar模型。