The New Diffusion Tensor and the Equatorial Anomaly Altitudes of F-Region

Year 2017, Volume: 13 Issue: 3, 717 - 723, 30.09.2017

Ali Yeşil , Selçuk Sağır

Abstract

In this study, the difference
( of the classical diffusion tensor (D_0, D₁,
D₂  for both steady-state and unsteady-case)
for F- region of the ionosphere at the equatorial  region is investigated by taking (B=B₀z),  the geometry of the Earth’s
magnetic field and by neglecting the neutral winds velocity (U). The
measurements were made in the height (280,300,340,390 and 410 km) where the equatorial
anomaly was observed predominantly. The magnitudes of the difference of
classical diffusion tensor for electrons are ∆D₀>∆D₁ >∆D₂
for all seasons with respect to both 12.00LT and 24.00LT at F-region.
However, ∆D₁ and ∆D₂ are bigger during nighttime than daytime
and show a behavior reverse to the change with latitude of electron density in
the magnetic equator. It is possible to say that the behavior of them can be the
result of electromagnetic drift and dynamo effect.

Keywords

Ionosphere, Diffusion Tensor, Equatorial F- Region

References

• Yesil A., Sagir S. , Ozcan O., 2009. E-Journal of New World Sci. Acad. 4(3), 92-99