Effect of latitudinal, daily and solar activity variations on vertical ionization velocity for maximum peak height for F2 layer

الملخص EN

This paper aims to calculate the vertical ionization velocity of maximum peak height of F2 layer of the ionosphere.

Also, this paper deals with the effects of the latitudinal, daily and the solar activity variations on ??? ?? ?? ̅̅̅̅̅̅̅ .

Another goal is to construct a simplified correlations for ??? ?? ?? ̅̅̅̅̅̅̅ as a function of the latitude and month as a function of monthly mean sunspot number (MMSN).

??? ?? ?? ̅̅̅̅̅̅̅ has a greater value for winter season than for summer season.

Also, the relation of the ??? ?? ?? ̅̅̅̅̅̅̅ with the monthly mean sunspot number MMSN shows an abnormal relation, also the hourly variation of ??? ?2 ?? ̅̅̅̅̅̅̅̅ obeys the fact that the electron density have the minimum values at sunrise and sunset, and has a maximum value for January month.

Key words: Electron density, plasma frequency, continuity equation, plasma production, loss, ion drift, Plasma diffusion, F2 region, Maximum peak height