Effects of humidity on sand and dust storm attenuation predictions based on 14 GHz measurement
| Main Authors: | Eltahir, E .I.; International Islamic University Malaysia, Elsheikh, Elfatih A. A.; King Khalid University, Babiker, A. Awad; Karary University, Rafiqul, Islam Md; International Islamic University Malaysia, Habaebi, Mohamad Hadi; International Islamic University Malaysia, Abdulla, Aisha H.; International Islamic University Malaysia, Saad, Elessaid; Karary University |
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| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Universitas Ahmad Dahlan
, 2021
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| Subjects: | |
| Online Access: |
http://journal.uad.ac.id/index.php/TELKOMNIKA/article/view/18148 http://journal.uad.ac.id/index.php/TELKOMNIKA/article/view/18148/9718 |
Daftar Isi:
- Several models were proposed to predict the attenuation of microwave signals due to sand and dust storms. Those models were developed based on the oretical assumptions like Rayleigh approximation, Mie equations or numerical methods. This paper presents a comparison between attenuation predicted by three different the oretical models with measured attenuation at 14GHz. 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 under estimating the measurement. Humidityis 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 agreat 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 environment factors that change during dust storm.