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| Titel |
Zonal drifts of ionospheric irregularities at temperate latitude in the Indian region |
| VerfasserIn |
S. Kumar, A. K. Gwal, 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 ; 13, no. 7 ; Nr. 13, no. 7, S.724-729 |
| Datensatznummer |
250011915
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| Publikation (Nr.) |
 copernicus.org/angeo-13-724-1995.pdf |
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| Zusammenfassung |
| The systematic time differences observed in
the onset of postsunset VHF scintillations recorded simultaneously at Ujjain (Geogr.
lat. 23.2°N, Geogr. long. 75.6°E) and Bhopal (Geogr.
lat. 23.2°N, Geogr. long. 77.6°E), situated at the peak
of the anomaly crest in the Indian region, have been analysed to determine the
zonal drifts of scintillation-producing irregularities. The method is based on
the assumption that the horizontal movement of irregularities does not change
while crossing the F-region cross-over points of these stations. The calculated
velocities of irregularities indicate an eastward drift decreasing from about
180 m s–1 to 55 m s–1 during the course of night. In the
premidnight period, the drifts are reduced under the magnetically disturbed
conditions. The average east-west extension of irregularites is found to be in
the range of 200–500 km. |
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