Optical Attenuation Measurements in Low Visibility Conditions

被引:0
|
作者
Dev, Kapal [1 ]
Nebuloni, Roberto [2 ]
Capsoni, Carlo [1 ,2 ]
机构
[1] Politecn Milan, Dipartimento Elettron Informaz & Bioingn, Milan, Italy
[2] Consiglio Nazl Ric CNR, IEIIT, Milan, Italy
关键词
Free-space optics (FSO); optical attenuation; fog; visibility;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Low visibility events detected in the city of Milan during six consecutive winter months are analyzed in order to compare optical attenuation measurements by two different instruments, i.e. a 319 m laser link operating at 785 nm and a visibility sensor. We show that the visibility sensor is a valuable support to estimate link attenuation in the cases when precipitation is absent or there is rain, provided that 1-sample/s raw data are averaged in time. On the other side, in the case of snowfall (that can produce high attenuation values), the agreement between the two sensors is poor.
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页数:5
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