| 电离层声重波引起的高频多普勒频移 |
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| 引用本文： | 李钧.电离层声重波引起的高频多普勒频移[J].地球物理学报,1983,26(1):1-8. |
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| 作者姓名： | 李钧 |
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| 作者单位： | 中国科学院武汉物理研究所 |
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| 摘 要： | 本文给出了电离层中存在电离运动时的高频无线电波的多普勒频移的表达式,讨论了用高频多普勒阵研究电离层声重波扰动有关的若干电波传播问题。
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| 关 键 词： | 声重波扰动 高频多普勒频移 电离层 射线理论 离区 表达式 时空变化 微分效应 电离密度 运动坐标系 |
| 收稿时间： | 1981-12-07 |
DOPPLER FREQUENCY SHIFTS OF A HF RADIO WAVE CAUSED BY THE IONOSPHERIC ACOUSTIC-GRAVITY WAVES |
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| LI JUN.DOPPLER FREQUENCY SHIFTS OF A HF RADIO WAVE CAUSED BY THE IONOSPHERIC ACOUSTIC-GRAVITY WAVES[J].Chinese Journal of Geophysics,1983,26(1):1-8. |
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| Authors: | LI JUN |
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| Institution: | Wuhan Institute of Physis, Academia Sinica |
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| Abstract: | In this paper, the Doppler frequency shift △ω of a radio wave propagating in a moving, time-varying, inhomogeneous ionosphere is expressed as an integral of the normal velocity V of the equal refractive index （μ） surfaces, the integral being taken over the ray path of the radio wave. Since the velocity F of equal μ surfaces is independent of the movement of the ray path, this expression implies that, the contribution to △ω of the movement of the ray path will be conceled out by that of the refractive index variation on the ray path caused by the movement of the ray path itself. In the case of a stratified ionosphere, this expression reduces to a very simple form. Therefore some propagation problems of the radio wave arising in the study of the acoustic-gravity wave in the ionosphere with the HP Doppler sounder array, such as （1） the dependence of Aco on the working frequency, （2） the effective probing height of the Doppler sounder, （3） the analysis method of the Doppler records with "S" shape, （4） ths interpretation of the appearance of more than one peaks in the spectrum of △ω, etc., turn out to be solvable. |
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