Physics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....8611443a&link_type=abstract
Journal of Geophysical Research, vol. 86, Dec. 1, 1981, p. 11443-11446. Financiadora de Estudos e Projetos
Physics
94
Dynamo Theory, Equatorial Regions, F Region, Ionospheric Drift, Magnetic Variations, Spread F, Atmospheric Ionization, Diurnal Variations, Drift Rate, Electric Fields, Radar Measurement
Scientific paper
A comparative study of evening prereversal enhancements in equatorial F region vertical ionization drift velocities conducted over two magnetic equatorial stations, at 4 deg S, 38 deg N and 12 deg S, 77 deg W, shows dissimilarities in the seasonal trends of the drift velocity prereversal peak times and widths. The dissimilarities, which are also reflected in spread F characteristics, are shown to be mainly due to the difference in magnetic field declination angle. This difference causes (1) differences in the conjugate E region sunset durations, and, in turn, in (2) the F region polarization electric field development rates at the two stations.
Abdu Mangalathayil Ali
Batista Inez S.
Bittencourt J. A.
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