On the Disturbance Daily Variations and the Lunar Daily Variations in the F2 Region of the Ionosphere on the Magnetic Equator

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Abstract
The paper examines the direct effects of the vertical electron drift, due to the electric fields accompanied by electric currents producing the observed geomagnetic SD-and L-variations, upon the F2-region of the ionosphere on the magnetic equator. It is shown that the calculated results may explain the main features of the observed disturbance daily variations (SD(F2)) and of the observed lunar daily variations (L(F2)) in the F2-region.