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| Titel |
Characteristics of VHF scintillations in the equatorial anomaly crest region in India |
| VerfasserIn |
K. N. Pathak, R. D. Jivrajani, H. P. Joshi, K. N. Iyer |
| 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.730-739 |
| Datensatznummer |
250011916
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| Publikation (Nr.) |
 copernicus.org/angeo-13-730-1995.pdf |
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| Zusammenfassung |
| The characteristics of ionospheric
scintillations at Rajkot in the equatorial anomaly crest region in India are
described for the years 1987–1991 by monitoring the 244-MHz transmission from
the satellite FLEETSAT. This period covers the ascending phase of solar cycle
22. Scintillations occur predominantly in the pre-midnight period during
equinoxes and winter seasons and in the post-midnight period during summer
season. During equinoxes and winter, scintillation occurrence increases with
solar activity, whilst in summer it is found to decrease with solar activity.
Statistically, scintillation occurrence is suppressed by magnetic activity. The
characteristics observed during winter and equinoxes are similar to those seen
at the equatorial station, Trivandrum. This, coupled with the nature of the
post-sunset equatorial F-region drift and h'F variations, supports
the view that at the anomaly crest station, scintillations are of equatorial
origin during equinox and winter, whilst in summer they may be of mid-latitude
type. The variations in scintillation intensity (in dB) with season and solar
activity are also reported. |
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