Interaction of oblique wave beam with ionospheric layer F2

被引:0
|
作者
Molotkov, I. A. [1 ]
Atamaniuk, B. [2 ]
Popov, A. V. [1 ]
机构
[1] RAS, Pushkov Inst Terr Magnetism Ionosphere & Radio Wa, Troitsk 142190, Moscow Region, Russia
[2] PAS, Space Res Ctr, PL-00716 Warsaw, Poland
关键词
Ionosphere; HF wave propagation; Powerful oblique wave beam; Trajectory variational principle; Artificial nonlinear waveguide; Gaussian beam; PROPAGATION;
D O I
10.1016/j.asr.2013.01.024
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Interaction of a powerful obliquely incident wave beam of decameter radio waves with the ionospheric F2 layer is analyzed. Much like the linear case, propagation through the natural anti-waveguide layer F2 splits the initial beam. Some part of its energy leaks through the ionospheric layer, the other part goes back along a downward trajectory. However, nonlinearity leads to further stratification of the ionospheric layer. A new feature, in comparison with the linear case, is appearing a narrow waveguide beneath the F2 layer maximum which traps a small part of the beam energy. We study the relationship between these parts of the wave field in a simplified model of parabolic F2 layer, with nonlinearity caused by thermal plasma expulsion from the high field intensity region. Analytical results are supplemented with numerical estimates of the effects. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:2333 / 2341
页数:9
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