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本文利用我国广州、海南电离层垂测站的资料，对临界频率实测值（月中值）与ＩＲＩ—９０模式值比较发现：ＩＲＩ—９０的计算值ｆ０Ｆ２普遍低于实测值；ｆ０Ｅ及ｆ０Ｆ１符合较好，但模式的Ｅ层和Ｆ１层出现与消失时刻同实际情况存在差异；模式忽略了冬季（１２，１，２月）Ｆ１层的存在。从富克镇的数字测高仪剖面资料发现不能用ＬＡＹ函数描述。从分析７９年西安及东京的ＴＥＣ值发现模式的分季缺陷。文未提出了修改建议。
In this paper, we use the data of ionospheric vertical stations in Guangzhou and Hainan of China to compare the measured value of the critical frequency (the median value) with the IRI-90 mode value: the calculated value of f0F2 of IRI-90 is generally lower than the measured value; f0E and f0F1 are in agreement But the E layer and F1 layer of the model are different from the disappearing moment in actual situation; the model ignores the existence of the F1 layer in winter (December, January and February). From the rich town of digital altimeter profile data can not be described by LAY function. From the analysis of 79 years in Xi’an and Tokyo, TEC value discovery pattern of quarterly deficiencies. The text did not propose amendments.