Low-field conduction in the D-region of the ionosphere in the presence of a high-field signal

Nag, B. R. ; Purkait, N. N. (1968) Low-field conduction in the D-region of the ionosphere in the presence of a high-field signal Journal of Atmospheric and Terrestrial Physics, 30 (8). pp. 1455-1460. ISSN 0021-9169

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00219...

Related URL: http://dx.doi.org/10.1016/S0021-9169(68)90145-1

Abstract

The theory of conduction in the lower ionosphere, due to a low-field probing signal, in the presence of a high-field disturbing signal, has been developed, neglecting the effect of earth's magnetic field and considering elastic collisions with neutral molecules. It is found that the value of the conductivity obtained from the assumption of the Maxwellian velocity distribution of the electrons is considerably higher than that obtained for the actually existing non-Maxwellian distribution. It is also observed that the ratio of these two values decreases with the increase in the amplitude of the high-field signal. The importance of this result in relation to the interpretation of cross-modulation results has been discussed.

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