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- W2107698026 abstract "Attenuation measurement on Ku- band satellite signal in a tropical site, Fiji is presented. Rain-attenuationprediction by ITU-R and the Crane Global models showed noticeable deviation to the measured values.Unlike the monotonic decrease predicted by these models, exceedance of rain-rate and attenuation in Fijiand other tropical regions showed the presence of breakpoints. For Suva, the breakpoint in rain-rate andattenuation were at 58 mm/h and 9.4 dB with exceedances of 0.009 and 0.018%, respectively. Modifications to the ITU-R model are proposed in this paper, for adopting it in the tropics. These modifications are based on the properties that in the tropics (i) the accumulation time factor at the breakpoints is an invariant (ii) for elevation angles5608 and at high rain rates multiple rain cells intersect the slant path. The attenuation exceedance is predicted by two expressions similar to the ITU-R model, one for rain-rates lower than the breakpoint rain-rate and the other above it. The modified prediction model show remarkable agreement with the measured Ku-band attenuation in seven tropical sites." @default.
- W2107698026 created "2016-06-24" @default.
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- W2107698026 date "2006-01-01" @default.
- W2107698026 modified "2023-10-10" @default.
- W2107698026 title "Modified rain attenuation model for tropical regions for Ku-Band signals" @default.
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- W2107698026 doi "https://doi.org/10.1002/sat.846" @default.
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