... 衰减 attenuation; decay; damping; ... 自由空间衰减 free space attenuation; free-space attenuation; space attenuation 自由空间损耗，自由空间衰减 free space loss (fsl) ...
In electromagnetic media, repeate overcome the attenuation caused by free-space electromagnetic-field divergence or cable loss.
在电磁媒体中，重复克服衰减引起的空间电磁场散度或电缆损失。
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The most typical weather restriction of Free-space Optical Communications System is the fog; the fog attenuation of laser is a main factor that affects the performance of the lasers communication.