An optical thickness of less than 0.1 indicates a clear sky with maximum visibility; a value of 1 or above indicates very hazy conditions.
光学厚度小于0.1意味着是能见度高的晴天；1或者以上则意味着烟雾天气。
The relationships between atmospheric aerosol optical thickness and horizontal visibility as well as the dusty weather were discussed.
本文还探讨了大气气溶胶光学厚度与水平能见度以及沙尘天气之间的关系。
There is no simple one-to-one correspondence between optical depth and surface horizontal visibility.
光学厚度与地面水平能见度不呈简单的对应关系。
On the basis of structure design of optical system and parameter option of optical components, the visibility of interference fringe with zero background intensity is optimized.
通过对光学干涉系统结构设计和元件参数选择，最大限度地优化了干涉条纹的可见度，并设计出零背景光强标准硅球直径精密测量系统。
This means the seasonal variation of the aerosol spectral optical depth is mainly determined by the variation of surface visibility.
而不分级的光学厚度季节起伏主要由各季节的几率能见度决定。
Experimental observation was taken at Xi 'an for profiling the optical properties of atmospheric aerosols and horizontal visibility.
系统对西安城区进行了斜程大气气溶胶廓线探测和水平能见度的连续观测。
Experimental observation was taken at Xi 'an for profiling the optical properties of atmospheric aerosols and horizontal visibility.
系统对西安城区进行了斜程大气气溶胶廓线探测和水平能见度的连续观测。
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