Fog is a colloidal suspension system consists of slow sedimentation in the air near the ground in t

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With laser technology matures, the atmosphere tandläkare near the ground laser communication has become a hot research, but various special weather is an important factor in atmospheric laser communication around the clock, with the continuous development of laser technology, laser applications tandläkare are increasingly widespread, especially is has a broad space for development in the field of military communications. When laser light signal propagation through the atmosphere random, affected by the atmospheric tandläkare gas molecules, aerosols and fog snow weather factors, leading to the attenuation of the laser signal energy. The atmosphere due to the uneven distribution leads to a laser diffraction and scattering effects occur in the air channel signal, resulting in the beam cross section of the beam energy distribution and fluctuation broadening and drift. Li Di, "Laser atmospheric transport of fog attenuation characteristics of" Chen Hui is a text from the Mie theory, the study analyzed the laser signal tandläkare attenuation characteristics in rain and fog weather transmission, and the focus of the analysis and summarizes the fog fading channel empirical model, and In Matlab platform to do the simulation tandläkare analysis. This paper analyzes the impact of the laser wavelength laser atmospheric transmission attenuation, rain rate, visibility and so on. Laser in the rain and fog on the transmission characteristics can understand the changes in the atmospheric channel characteristics of laser produced to provide reference for atmospheric laser communication system tandläkare design and improvement. tandläkare
Fog is a colloidal suspension system consists of slow sedimentation in the air near the ground in the tiny water droplets or ice crystals and other components. Layer of air near the ground is the product of condensation (or sublimation) tandläkare of. Geographical formation mechanism of the formation of fog and mist under. The fog is divided into two categories: advection fog and radiation fog. Generally believed that the sea fog is usually advection fog, radiation fog inland fog usually. Because of the concentration of the laser attenuation and fog liquid water content, visibility a great relationship, tandläkare and these parameters more easily tandläkare measured, the visibility of empirical models based on extensive applications in engineering. In the case of the same visibility and the same wavelength. Advection fog attenuation is higher than the radiation fog. This is due to advection fog droplet size than radiation fog, visibility in the same conditions, the moisture content of advection tandläkare fog is high.
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