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INFLUENCE OF VISIBILITY ON AVAILABILITY OF FREE SPACE OPTICAL LINK

机译：可见度对自由空间光链路可用性的影响

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摘要

Results of a propagation study on a free space optical link at 850 nm on an 850 m long path over a one-year period are presented. Individual attenuation events were compared with the concurrent meteorological conditions and were classified according to the types of individual hydrometeors that occurred. The records of both the observed attenuation events and the concurrent meteorological situations were statistically processed. Cumulative distributions of attenuation due to individual hydrometeors as well as cumulative distributions of visibility were obtained for both each month and the whole year period. The real influence of individual hydrometeors on both attenuation of free space optical link and visibility was assessed. Cumulative distributions of attenuation due to fog were calculated from the measured cumulative distributions of visibility due to fog according to different formulas. The results obtained were compared with the measured cumulative distributions of attenuation due to fog. The relationship for the best fitted approximation to the measured data was proposed.
机译：给出了在一年的时间内在850 m长路径上在850 nm的自由空间光链路上进行传播研究的结果。将单独的衰减事件与同时发生的气象条件进行比较，并根据发生的单个水汽象的类型进行分类。对观测到的衰减事件和同时发生的气象情况的记录进行统计处理。获得每个月和全年的归因于单个水凝物的衰减的累积分布以及能见度的累积分布。评估了各个水位计对自由空间光链路衰减和可见度的实际影响。根据不同的公式，根据测得的由于雾引起的可见性的累积分布，计算出由于雾引起的衰减的累积分布。将获得的结果与测得的由于雾引起的衰减的累积分布进行比较。提出了与测量数据的最佳拟合近似关系。

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