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| Titel |
Variations of solar EUV, UV and ionospheric foF2 related to the solar rotation period |
| VerfasserIn |
R. P. Kane, E. R. Paula, N. B. Trivedi |
| 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 ; 13, no. 7 ; Nr. 13, no. 7, S.717-723 |
| Datensatznummer |
250011914
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| Publikation (Nr.) |
 copernicus.org/angeo-13-717-1995.pdf |
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| Zusammenfassung |
| Spectral analysis of daily values of various
solar indices viz. sunspot number, 10.7-cm flux, H Lyman-α and
-β, specific He, Fe and Mg lines and solar X-rays was carried out for
two selected intervals. During interval A (May-August 1978, 123 days) the solar
indices showed a prominent periodicity near 27 days, while during interval B
(January-May 1979, 151 days) the solar indices showed a prominent periodicity
near 13 days. For the same intervals, foF2 (max) and foF2
(average) during 1000-1500 LT were similarly analysed for the locations
Cachoeira Paulista, SP, Brazil (23°S, 45°W), and Okinawa (26°N, 128°E) and
Kokubunji (36°N, 139°E) in Japan. The 27-day and 13-day periodicities in solar
indices were reflected in the foF2 series, but in different relative
proportions at the three locations, probably due to the interference of local
aerodynamical effects. Some other periodicities were common to solar indices and
foF2, while some others were present in the solar indices but not in foF2,
or vice versa |
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