Long-term trends in the ratio of the daytime and nighttime values of foF2

被引：0
|
作者：
A. D. Danilov
L. B. Vanina-Dart
机构：
[1] Institute of Applied Geophysics,
来源：
Geomagnetism and Aeronomy | 2007年 / 47卷
关键词：
94.20.Ji;
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学科分类号：
摘要：
The consideration of the relation between the daytime and nighttime values of the critical frequency F2, foF2 of the ionospheric F2 layer, started in the previous publication of the authors, is continued. The main regularities in variations in the correlation coefficient R(foF2) characterizing this relation are confirmed using larger statistical material (more ionospheric stations and longer observational series). Long-term trends in the R(foF2) value are found: at all stations the negative value of R(foF2) increases with time after 1980.
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页码：221 / 226
页数：5
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