针对雨雾共存的特殊天气条件下大气衰减计算模型误差较大的问题,由雨雾天气的物理现象入手,对现有模型进行修正,提出更为精确、合理的大气衰减计算模型,并采用该模型对无线光通信系统的链路余量进行仿真分析。结果表明,采用已有的理论模型计算将引入较大的系统误差,而修正的计算模型更加精确。提出的修正模型和分析结论对无线光通信及其他相关领域中大气衰减的估计和评价具有重要指导意义。 Aiming at the large error of the calculation model of atmosphere attenuation under the special weather conditions that coexist with rain and fog, the physical model of rain and fog weather is used to correct the existing model. A more accurate and reasonable calculation model of atmospheric attenuation is proposed. Wireless optical communication system link margin simulation analysis. The results show that the use of the existing theoretical model will introduce a larger systematic error, while the revised calculation model is more accurate. The proposed correction models and analysis conclusions are of great guiding significance for the estimation and evaluation of atmospheric attenuation in wireless optical communications and other related fields.