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Prediction of Rain Attenuation Trend due to Climate Change in Some Locations of Southwestern Nigeria
Radioelectronics and Communications Systems Pub Date : 2021-03-10 , DOI: 10.3103/s0735272721010052
Folasade Abiola Semire , Adeyanju Joshua Adekunle , Robert Oluwayimika Abolade , Oluwole Abiodun Adegbola

Abstract

Climate change has become a phenomenon of global concern and it has resultant effect on the variability of radio propagation. In recent times, the issue of climate change has been a global phenomenon having its resultant effect on the variability of radio propagation. High-capacity radio signal fades due to absorption by atmospheric gases and scattering by hydrometeors which limits the link availability. This study is aimed at investigating the effects of climate change trend via rain attenuation along the satellite-earth path over Nigeria’s climate. Rain rates computed by using the compensated function on Semire and Rosmiwati model were utilized to estimate rain attenuations and effective path lengths using ITU-R P.618-13 model on NIGCOMSAT-1R satellite at 0.01% exceedance for selected frequencies within Ku- and K-bands. Linear trend models for annual rain attenuation were also developed. At 0.01% time unavailability, the prediction of rain attenuation on NIGCOMSAT-1R link using ITU-R P.618-13 model ranged from 14 to 28 dB at Ku-band, and rose beyond 40 dB at K-band. This study inferred that trends of rain rate distributions corresponded to the trends in attenuation due to rain and then concluded that the rising trends of yearly signal outage along earth-space path as a result of increasing rainfall intensity was due to climate change in the study area. This outcome can be explored for better communication planning and design in order to provide reliable links in order to satisfy customers’ demand for high quality radio communication.



中文翻译:

尼日利亚西南部某些地区由于气候变化引起的降雨衰减趋势的预测

摘要

气候变化已成为全球关注的现象,并且其结果对无线电传播的可变性产生影响。近年来,气候变化问题已成为一种全球现象,其结果对无线电传播的可变性产生影响。高容量无线电信号由于大气气体的吸收和水凝物的散射而衰减,从而限制了链路的可用性。这项研究旨在调查气候变化趋势对沿尼日利亚地球气候沿卫星地球路径的降雨衰减的影响。对于在Ku-和K范围内选定的频率,使用ITU-R P.618-13模型在NIGCOMSAT-1R卫星上使用Semire和Rosmiwati模型上的补偿函数计算的降雨率来估算降雨衰减和有效路径长度乐队。还开发了年度降雨衰减的线性趋势模型。在0.01%的时间不可用时,使用ITU-R P.618-13模型在NIGCOMSAT-1R链路上降雨衰减的预测在Ku频段为14到28 dB,在K频段超过40 dB。这项研究推断出降雨率分布的趋势与降雨造成的衰减趋势相对应,然后得出结论,由于降雨强度增加,沿地球-空间路径的年度信号中断的上升趋势是由于研究区域的气候变化引起的。 。可以探索此结果以进行更好的通信规划和设计,以便提供可靠的链接,从而满足客户对高质量无线电通信的需求。使用ITU-R P.618-13模型对NIGCOMSAT-1R链路的降雨衰减的预测在Ku频段为14至28 dB,而在K频段则超过40 dB。这项研究推断出降雨率分布的趋势与降雨造成的衰减趋势相对应,然后得出结论,由于降雨强度增加,沿地球-空间路径的年度信号中断的上升趋势是由于研究区域的气候变化引起的。 。可以探索此结果以进行更好的通信规划和设计,以便提供可靠的链接,从而满足客户对高质量无线电通信的需求。使用ITU-R P.618-13模型对NIGCOMSAT-1R链路的降雨衰减的预测在Ku频段为14至28 dB,而在K频段则超过40 dB。这项研究推断出降雨率分布的趋势与降雨造成的衰减趋势相对应,然后得出结论,由于降雨强度增加,沿地球-空间路径的年度信号中断的上升趋势是由于研究区域的气候变化引起的。 。可以探索此结果以进行更好的通信规划和设计,以便提供可靠的链接,从而满足客户对高质量无线电通信的需求。这项研究推断出降雨率分布的趋势与降雨造成的衰减趋势相对应,然后得出结论,由于降雨强度增加,沿地球-空间路径的年度信号中断的上升趋势是由于研究区域的气候变化引起的。 。可以探索此结果以进行更好的通信规划和设计,以便提供可靠的链接,从而满足客户对高质量无线电通信的需求。这项研究推断出降雨率分布的趋势与降雨造成的衰减趋势相对应,然后得出结论,由于降雨强度增加,沿地球-空间路径的年度信号中断的上升趋势是由于研究区域的气候变化引起的。 。可以探索此结果以进行更好的通信规划和设计,以便提供可靠的链接,从而满足客户对高质量无线电通信的需求。

更新日期:2021-03-10
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