Vertical plasma drifts in the post-sunset F-region at the magnetic equator

Details Vertical plasma drifts in the post-sunset F-region at the magnetic equator Vertical plasma drifts in the post-sunset F-region at the magnetic equator

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50.1087n&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 50, Dec. 1988, p. 1087-1091.

Physics

10

F Region, Magnetic Equator, Plasma Drift, Sunset, Magnetic Anomalies, Solar Activity, Solar Flux

Scientific paper

High frequency Doppler observations of vertical plasma drifts in the post-sunset equatorial F-region at Trivandrum, India are presented. It is found that under magnetically quiet conditions, the peak velocity drops by about a factor of 3 as the solar flux index changes from about 125 to 70. It is shown that the drift velocity drops by more than a factor of 2 from quiet to moderate activity, but builds back to the quiet day level for high magnetic activity. The occurrence of equatorial spread-F is closely linked to the post-sunset enhancement in the vertical drift velocity, with both showing dependence on solar and magnetic activities.

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