This study investigates the effect of rainfall on horizontally polarized radio waves for fixed satellite service at Ku, Ka and V bands for links to the recently launched Nigeria Communication Satellite one (NigComSat-1), for annual time availabilities of 99–99.99% in an average year for 37 stations in Nigeria. The results obtained at Ku-band downlink shows that 99.99% availability is possible in all the 37-stations in Nigeria. At Ka-band downlink the results also show that only 99.9% availability is practicable in all the 37 stations in Nigeria. At V-band downlink, 99.99% availability is also not possible in all the 37 stations in Nigeria. An availability level of 99.9% is only practicable in the North–West (NW) and North–East (NE) regions, where the attenuation is between 14 and 17.9 dB. Total fade out of signals during rainfall are probable in the South–South (SS), South–East (SE), South–West (SW) and Middle–Belt (MB) regions at 99.9% availability.ud
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机译：这项研究调查了降雨对Ku，Ka和V波段固定卫星服务的水平极化无线电波的影响，这些卫星与最近发射的尼日利亚通信卫星一号（NigComSat-1）建立了链接，在一个卫星中，年时间利用率为99–99.99％。尼日利亚平均有37个电台。在Ku频段下行链路上获得的结果表明，尼日利亚所有37个站点的可用性都可以达到99.99％。在Ka频段下行链路上，结果还表明，在尼日利亚的所有37个电台中，只有99.9％的可用性是可行的。在V波段下行链路上，尼日利亚的所有37个站点也不可能达到99.99％的可用性。只有在西北（NW）和东北（NE）地区，衰减在14至17.9 dB之间，才能达到99.9％的可用性水平。在南南（SS），东南（SE），西南（SW）和中腰带（MB）地区，降雨期间信号的总衰减量很可能为99.9％。 ud
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