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Total Attenuation of Satellite Signal on Earth-Space Link in West Africa

机译:西非天地链路上卫星信号的总衰减

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The study examines the consequence of total attenuation impairments on fixed satellite communication link on earth-space path in West Africa for 0.01 % unavailability of an average year. The International Telecommunication Union Radio Propagation Recommendation (ITU-RP 618, 2012) procedure and study group 3 data bank base was used for the computation of total attenuation for seventeen (17) West Africa countries for both uplink and downlink frequencies. The results reveal lowest value at C-band which gradually increases at Ku and Ka bands while the highest values of total attenuation are experienced at v- band for all the locations. Both uplink and downlink results at v-bands show constantly that total attenuation is more severe (more than 100 dB) in countries like Togo (139.64 dB), Liberia (138.55 dB), Ghana (138.20 dB), Benin (134.19 dB), Ivory Coast (132.75 dB), and Nigeria (122.42 dB). It should be noted that all stations are in the tropical region of West Africa where rainfall is very high and therefore will experience more signal loss due to the presence of rain, cloud, oxygen, and water vapor even in clear-sky or none rainy conditions. The overall results will be helpful for system planning and better performance of satellite communication link in West Africa region.
机译:这项研究检查了西非地球空间路径上固定卫星通信链路上总衰减减损的后果,即平均每年不可用0.01%。使用国际电信联盟无线电传播建议书(ITU-RP 618,2012)程序和第3研究组数据库来计算十七(17)个西非国家在上行链路和下行链路频率上的总衰减。结果表明,C波段的最低值在Ku和Ka波段逐渐增加,而所有位置的v波段总衰减最高。在v波段的上行链路和下行链路结果都不断显示,在多哥(139.64 dB),利比里亚(138.55 dB),加纳(138.20 dB),贝宁(134.19 dB),科特迪瓦(132.75 dB)和尼日利亚(122.42 dB)。应该注意的是,所有电台都位于西非的热带地区,那里的降雨非常多,因此即使在晴空或没有雨天的条件下,由于存在雨,云,氧气和水蒸气,也会遭受更多的信号损失。总体结果将有助于系统规划和西非地区卫星通信链路的更好性能。

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