Authors : Otgonbaatar Yura; Buyankhishig Zundui; Ganbold Shagdar

Volume/Issue : Volume 11 - 2026, Issue 3 - March

Google Scholar : https://tinyurl.com/38aetn8a

Scribd : https://tinyurl.com/bhjxwpuu

DOI : https://doi.org/10.38124/ijisrt/26mar112

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Abstract : Satellite communication systems operating at high frequencies are significantly affected by atmospheric impairments, particularly cloud-induced attenuation. As Mongolia advances its national satellite program at the 113.6°E geostationary orbital position allocated by the International Telecommunication Union, accurate estimation of propagation losses becomes essential for reliable link design. This study evaluates cloud attenuation for C-, Ku-, and Kaband satellite links in Ulaanbaatar, Mongolia, using the internationally standardized ITU-R P.840-5 methodology. Seasonal atmospheric temperature data obtained from radiosonde measurements (2015–2020) and statistical liquid water content values were incorporated to determine the specific attenuation coefficient (Ki) and total path attenuation. Results indicate that attenuation increases significantly with frequency and is strongly influenced by seasonal temperature variations, with maximum values observed in winter due to enhanced dielectric interaction of liquid water. The Ka-band exhibits the highest sensitivity, reaching peak attenuation under high liquid water content conditions. The findings provide essential technical insight for satellite link budgeting, system reliability assessment, and sustainable satellite network planning under Mongolia’s extreme continental climate conditions.

Keywords : Cloud Attenuation, Liquid Water Content, ITU-R P.840-5

References :

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