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| Titel |
Seasonal and solar cycle association of zonal drifts of ionospheric plasma irregularities in the Indian equatorial region |
| VerfasserIn |
B. M. Pathan, D. R. K. Rao |
| 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 ; 14, no. 3 ; Nr. 14, no. 3, S.297-303 |
| Datensatznummer |
250012209
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| Publikation (Nr.) |
 copernicus.org/angeo-14-297-1996.pdf |
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| Zusammenfassung |
| Long series of simultaneous VHF scintillation
observations at two stations situated in near magnetic east-west direction in
the vicinity of the dip equator in the Indian region have been employed to
investigate the night-time ionospheric plasma zonal drifts. The drifts are found
to be predominantly easterly. On comparing the magnitudes of the drifts with
those results derived earlier by HF fading technique, monitoring signals from
two satellites at a station and spaced receiver experiment, their associations
with the season and the degree of solar activity are discussed. On a broader
scale, the annual mean sunspot number is shown to have a direct control on the
derived drift, the positive relationship even on day to day basis with the solar
flux is established. However, the relationship, as understood by the slope of
the best fit line, in the Indian region (0.27) is found to be weaker when
compared with the similar slope (0.45) in the American sector. There appears to
be no geomagnetic activity control on the estimated drifts. |
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