[2] It is known that internal gravity waves (IGW) impact significantly on the propagation of electromagnetic waves in a wide range of frequencies [Grigor'ev, 1999]. As a result of such interaction, Doppler shifts of the radio wave frequency, variations in the arrival angles, multipath propagation, etc., occur. Grigor'ev [2006] estimated the influence of IGW on the radio wave absorption. Interesting data concerning the influence of the traveling ionospheric disturbances on HF waves were presented by Fridman et al. [1995]. Here we consider the effects occurring at reflection of radio waves from the separation boundary influenced by IGW.
[3] Zaboronkova et al. [2003] modified the Maluzhinets method [Al'pert et al., 1953] developed for calculation of the field of a vertical electric dipole (VED) located over a homogeneous plain impedance boundary, to the inhomogeneous boundary case. On the basis of the method proposed, here we evaluate the influence of the disturbances of the ionosphere boundary impedance caused by internal gravity waves on the field of a cylindrical electromagnetic wave. Similar problem in application to the propagation of pulses along the Earth's surface was considered by Popov and Kopeikin [2005].
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