کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1767616 | 1020198 | 2010 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A statistical study of the mid-latitude NmF2 winter anomaly
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Hourly values of the F2-layer peak density, NmF2, measured by 62 ionosonde stations from 1957 to 2008 at middle geomagnetic latitudes of the northern and southern hemispheres are used in a statistical study of the F2-region winter anomaly. We analyze a maximum value, R, of the winter/summer geomagnetically quiet daytime NmF2 ratio over each ionosonde for approximately the same winter and summer solar activity conditions. The conditional probability of an occurrence of R in an interval of R, the most frequent value of R, the mean expected value of R, and the conditional probability to observe the F2-region winter anomaly are calculated and studied for low, moderate, and high solar activity conditions. It is found that northern hemisphere stations show significant cross-correlations of winter anomaly statistics with geomagnetic latitude for moderate and high solar activities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 45, Issue 3, 1 February 2010, Pages 374-385
Journal: Advances in Space Research - Volume 45, Issue 3, 1 February 2010, Pages 374-385
نویسندگان
A.V. Pavlov, N.M. Pavlova, S.F. Makarenko,