Study of the Equatorial Ionosphere: The Equatorial Evening Minimum in the Total Electron Content of the Ionosphere and Its Role in Equatorial Scintillation.
Final rept. 1 Jan 74-30 Sep 77,
GHANA UNIV LEGON DEPT OF PHYSICS
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A minimum in the total electron content of the equatorial ionosphere frequently appears shortly after sunset in measurements of Faraday rotation made at Legon, Ghana latitude 5.63 deg N, longitude -0.19 deg E, magnetic dip 8 deg S. This paper describes the phenomenon and investigates its occurrence characteristics over a period of six years. It concludes that the effect is due to a transport phenomenon described as a circulation cell which follows the sunset line. This circulation is not considered to be the primary cause of the production of irregularities in the night time F region, but the mechanism is thought to contribute both to the intensity and the duration of the resulting scintillation. Author
- Atmospheric Physics