Thirty‐nine years of archived meteorological data measured at two stations located in the northern and southern parts of Quebec, Canada are used to estimate the surface refractivity and its dry and wet components. The results of the comparison of the obtained estimates showed that for all months the values of the dry component are higher in the northern part, whereas the values of the wet component are higher in the southern part. Due to this, for several months of the year, the values of the surface refractivity are higher in the northern part and for the remaining months in the southern part. Moreover, in both parts, August is the month where the highest values of the surface refractivity were recorded. In this particular month, the slope of the surface refractivity trend in the northern part is several times higher than that in the southern part. The obtained results show that the performance of the used direct smoothing forecasting technique depends on the deviation between the values of N in the current year and the previous year.

中文翻译：

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加拿大魁北克省北部和南部地表无线电折射率变异性的比较

在加拿大魁北克省北部和南部的两个站点测得的39年归档气象数据用于估算地表折射率及其干湿成分。比较得出的估计结果表明，在所有月份中，北部的干成分值均较高，而南部的湿成分值均较高。因此，一年中的几个月中，北部的表面折射率值较高，而南部的其余月份则较高。此外，在两个部分中，八月都是记录表面折射率最高值的月份。在这个特定的月份 北部表面折射率趋势的斜率比南部高几倍。获得的结果表明，所使用的直接平滑预测技术的性能取决于值之间的偏差。本年和上一年的N。