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| Titel |
Quiet-condition variations in the scale height at F2-layer peak at Jicamarca during solar minimum and maximum |
| VerfasserIn |
C.-C. Lee, B. W. Reinisch |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 25, no. 12 ; Nr. 25, no. 12 (2008-01-02), S.2541-2550 |
| Datensatznummer |
250015960
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| Publikation (Nr.) |
 copernicus.org/angeo-25-2541-2007.pdf |
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| Zusammenfassung |
| This study is the first attempt to examine the quiet-condition variations in
scale height (Hm) near the F2-layer peak in the equatorial ionosphere. The
data periods of Hm derived from the Jicamarca ionograms are January-December
1996 and April 1999–March 2000. The results show that the greatest and
smallest Hm values are generally at 11:00–12:00 LT and 04:00–05:00 LT,
respectively. Additionally, the sunrise peak occurs at 06:00 LT only during
solar minimum. The post-sunset peaks in the equinoctial and summer months
are more obvious during solar maximum. The Hm difference between solar
minimum and maximum are significant from afternoon to midnight. On the other
hand, the Hm values during 07:00–10:00 LT for solar minimum are close to those
for solar maximum. Furthermore, the correlation of Hm with the critical
frequency (foF2) of F2-layer is generally low. In contrast, the correlation
between Hm and the peak height (hmF2) of F2-layer is high. For Hm and the
thickness parameter (B0) of F2-layer, the correlation between these two
parameters is almost perfect. |
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