针对单频GPS接收机受电离层影响较大的特点,利用GPS实测数据,比较研究了Klobuchar模型、NeQuick模型、IRI模型和IGGSH模型的电离层延迟改正效果,统计分析了各模型在时空上的特点,计算结果表明,IGGSH模型优于其他3种电离层延迟改正模型.%Aiming at the defect of single-frequency GPS receiver affected by ionospheric, the effect of ion-ospheric delay correction with four kinds of different ionospheric models ( I. E. Klobuchar, NeQuick, IRI and IGGSH) have been analyzed by use of some GPS data as the example. The spatial-temporal characteristics of each ionospheric model is analyzed statistically. The calculation results show that IGGSH model is better than the other three ionospheric delay correction models.
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