Effects of humidity on sand and dust storm attenuation predictions based on 14 GHz measurement

Eltahir Mohamed, Eltahir idris and Elsheikh, Elfatih A. A. and Babiker, A. Awad and Islam, Md. Rafiqul and Habaebi, Mohamed Hadi and Hassan Abdalla Hashim, Aisha and Saad, Elessaid (2021) Effects of humidity on sand and dust storm attenuation predictions based on 14 GHz measurement. TELKOMNIKA Telecommunication, Computing, Electronics and Control, 19 (2). pp. 364-371. ISSN 1693-6930 E-ISSN 2087-278X

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Abstract

Several models were proposed to predict the attenuation of microwave signals due to sand and dust storms. Those models were developed based on theoretical assumptions like Rayleigh approximation, Mie equations or numerical methods. This paper presents a comparison between attenuation predicted by three different theoretical models with measured attenuation at 14 GHz. Dielectric constant of dust particles is one of the important parameter in prediction models. This constant is estimated from measured dust samples and is utilized for predictions. All models are found largely underestimating the measurement. Humidity is also monitored and has been observed higher during dust storm. Hence dielectric constants are re-estimated with relative humidity conditions using available conversion model. The prediction has a great impact of humidity and predicted attenuations are found much higher in humid than dry dust condition. However, all models underestimate the measurement even considering 100% of relative humidity. Hence it is recommended to investigate the models by considering humidity and other environmental factors that change during dust storm.

Item Type:	Article (Journal)
Additional Information:	3802/86294
Uncontrolled Keywords:	Complex Permittivity, Dust Storm Attenuation, Humidity Microwave Propagation, Visibility,
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering 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 Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr. Md. Rafiqul Islam
Date Deposited:	21 Dec 2020 17:25
Last Modified:	19 May 2021 15:54
URI:	http://irep.iium.edu.my/id/eprint/86294

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