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2.4.2.2 天线仰角大于4°时闪烁衰落损耗(参考文献ITU-R P.453-6,ITU-R P.618) 对流层闪烁(troposheric scintillation)损耗的大小与大气折射率改变的幅度和大气折射率改变的结构有关;当工作频率升高,闪烁衰落深度加大;工作频率相同,天线仰角越低,对流层闪烁衰落深度越大;同样的工作频率和相同的天线仰角,天线口径加大,天线波束变窄,对流层闪烁衰落深度减小。它的月平均波动偏差值(r.m.s)与N_(Wet)有关,N_(Wet)称为电波在湿空气中的折射率。N_(Wet)与大气中的水汽密度有关补。N_(Wet)可以从
2.4.2.2 Scintillation fading loss when the antenna elevation angle is greater than 4 ° (Reference ITU-R P.453-6, ITU-R P.618) The magnitude of the troposheric scintillation loss varies with the magnitude of atmospheric refractive index change and atmospheric refraction The rate of change of the structure; when the working frequency increases, the flicker fading depth increases; the same working frequency, the lower the antenna elevation, the greater the tropospheric flicker fading depth; the same operating frequency and the same antenna elevation angle, antenna diameter increases, the antenna The beam narrows and the tropospheric flicker fading depth decreases. Its monthly average deviation (r.m.s) is related to Wet, which is called the refractive index of radio waves in wet air. N_ (Wet) is related to the water vapor density in the atmosphere. N_ (Wet) can be from