水平方向上大气紫外透射比的指数衰减规律决定了系统工作的局域性和保密性。
Exponential attenuation of UV atmospheric transmittance for the horizontal paths decides that the UV communication system works locally and safely.
基于应用的考虑：模拟实际应用过程，规定了紫外老化试验后产品的可见光透射比保持率，以保证产品具有稳定的光学性能。
Application: Regulating reservation rate of light transmittance after UV weathering test to simulate practical application progress, which guarantees the product maintaining the stable performance.
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