Thirdly, the fog attenuation for Gauss beam propagation is discussed, and the computational results are compared with those with plane wave incidence.

对高斯波束在雾中的衰减进行了讨论，并将数值计算结果与平面波结果进行了对比。

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The most typical weather restriction of Free-space Optical Communications System is the fog; the fog attenuation of laser is a main factor that affects the performance of the lasers communication.

雾是制约无线光通信系统的最典型气象条件，它对激光的衰减效应是影响光通信性能的主要因素。

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We get rules of the attenuation of fog, cloud, haze and atmosphere as the height changes, and give the calculation formula of the laser scattering character of cloud layer.

推导了雾、霾、云、大气的衰减随高度变化的规律，给出了云层激光回波特性的计算公式。

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