| 运动的随时间而变的电离层所引起的多普勒频移 |
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| 引用本文： | 谢益溪.运动的随时间而变的电离层所引起的多普勒频移[J].地球物理学报,1982,25(4):295-303. |
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| 作者姓名： | 谢益溪 |
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| 作者单位： | 中国电波传播研究所 |
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| 摘 要： | 本文分析了电离层的变化和运动引起多普勒频移的物理机制,假定了一个包含多种因素的电离层模型。在此基础上得到电离层反射信号的多普勒频移公式以及穿过电离层的信号的多普勒频移公式。这些公式把多普勒频移与电离层及不均匀团块的电子密度变化、层和团块的运动速度以及地球磁场强度变化等参数直接联系起来。
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| 关 键 词： | 多普勒频移 电离层形态 电子浓度 团块 反射点 折射指数 正规层 频率 电离层模型 垂直方向 |
| 收稿时间： | 1981-01-15 |
DOPPLER FREQUENCY SHIFTS OF RADIO WAVES CAUSED BY A MOVING AND TIME-VARYING IONOSPHERE |
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| XIE YI-XI.DOPPLER FREQUENCY SHIFTS OF RADIO WAVES CAUSED BY A MOVING AND TIME-VARYING IONOSPHERE[J].Chinese Journal of Geophysics,1982,25(4):295-303. |
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| Authors: | XIE YI-XI |
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| Institution: | Institute of Radio Wave Propagation of China |
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| Abstract: | The mechanism of Doppler frequency shifts resulted from variations and movement of ionosphere is analysed, and a general model for the ionosphere involving several factors is assumed. The formulas of Doppler shift due to the reflected signal and that travelling through the ionosphere are thus derived. By using the formulas, the Doppler shifts are related to the variation of electron density of both the ionosphere and the inhomogeneous mass, to the moving velocity of the layer and of the mass, as well as to the variation of earth's magnetic field.It is concluded that the movement of a layer would produce generally the Doppler shift proportional to frequency, but this should be considered as a result of variations of the ray path under the bottom of the moving layer. When the radio waves propagate between the earth surface and a satellite in high orbit, the Doppler shift will not be introduced by the movement of the layer. |
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