Accession Number:

ADA050647

Title:

Study of the Equatorial Ionosphere: The Equatorial Evening Minimum in the Total Electron Content of the Ionosphere and Its Role in Equatorial Scintillation.

Descriptive Note:

Final rept. 1 Jan 74-30 Sep 77,

Corporate Author:

GHANA UNIV LEGON DEPT OF PHYSICS

Personal Author(s):

Report Date:

1977-11-30

Pagination or Media Count:

34.0

Abstract:

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

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE