Radio Research Board Laboratory, School of Electrical Engineering, University of Sydney, Sydney, N.S.W., Australia
Abstract:
It is shown that the arguments advanced by Shaw(1) to demonstrate that the absorption of radio waves in the ionosphere is controlled by the currents causing geomagnetic variations are unsound. Further the method used by Bandyopadhyay(2) in deducing the nondeviative absorption leads to too high a proportion of this absorption in the total. The two D-regions model proposed by Rumi(3) is also unsatisfactory in several respects. In all three papers, error arises because of the neglect of the deviative absorption in E-region. The reason for this neglect may be because of the resemblance between the frequency variation of E-region deviative absorption and that of the non-deviative absorption, except in the immediate vicinity of ƒ0E.