基于孔径接收的对数振幅时间相关函数，结合星地激光下行链路的实际情况，推导了适用于星地下行孔径接收的闪烁频谱表达式。
Based on the temporal covariance of logarithmic amplitude, analytical expression was obtained for aperture receiving power spectrum of atmospheric scintillation of satellite-to-ground downlink.
互相关函数的最大幅度与事件波形的振幅随距离具有相同的衰减规律。
Amplitude degressions with distance of single event waveform and crosscorrelation functions are much similar.
通过长程情况下的马尔科夫近似，得到了互相关函数，对数振幅和相位协方差函数。
According to the Markov approximation under a long haul condition, we get the inter-correlation function, log-amplitude and phase covariance function.
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