Visibility effect on the availability of a terrestrial free space optics link under a tropical climate

Basahel, Ahmed and Islam, Md. Rafiqul and Habaebi, Mohamed Hadi and Ahmad Zabidi, Suriza (2016) Visibility effect on the availability of a terrestrial free space optics link under a tropical climate. Journal of Atmospheric and Solar-Terrestrial Physics, 143-144. pp. 47-52. ISSN 1364-6826 E-ISSN 1879-1824

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Abstract

Haze, fog and rain limit the visibilities and acts as dominant parameter for free space optics availability estimation. Low visibilities increase atmospheric attenuation and reduce the availability of optical signals from free space optics (FSO) links. Thus, this study determines the effect of visibility on FSO link availability in a tropical climate. Visibility data were measured in Malaysia for three years and used to estimate availability of FSO links. Rain and haze are two phenomena which reduces the visibility in tropical climate like Malaysia. Hence three cases were considered for measured data analysis: rain with dense haze, dense haze, and normal haze cases. In Malaysia, seasonal dense haze is mainly attributed to forest fires in Indonesia and in parts of Malaysia. The atmospheric attenuations predicted based on measured visibility (km) were compared across the three cases. The attenuations in the first two cases are found severe (almost 155 dB/km); while in the third case it is very low (almost 6 dB/km). The worst case (dense haze) is equivalent to a thick fog in temperate regions and must be examined carefully with respect to FSO deployment in a tropical environment.

Item Type:	Article (Journal)
Additional Information:	3802/50029
Uncontrolled Keywords:	FSO, Visibility,Haze, Atmospheric attenuation, Availability
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr. Md. Rafiqul Islam
Date Deposited:	25 Apr 2016 09:31
Last Modified:	18 Aug 2017 09:58
URI:	http://irep.iium.edu.my/id/eprint/50229

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