Modified rain attenuation model for tropical regions for Ku-band signals

Visagaperuman Ramachandran, Vickal Kumar

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45 Citations (Scopus)


Attenuation measurement on Ku- band satellite signal in a tropical site, Fiji is presented. Rain-attenuation prediction 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 Fiji and other tropical regions showed the presence of breakpoints. For Suva, the breakpoint in rain-rate and attenuation were at 58 mm/h and 9.4dB 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 angles
Original languageEnglish
Pages (from-to)53 - 67
Number of pages15
JournalInternational Journal of Satellite Communications and Networking
Issue number1
Publication statusPublished - 2007
Externally publishedYes

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