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Rainfall Attenuation and Rainfall Rate Measurements in Malaysia Comparison with Prediction Models

Author(s): Mandeep Singh Jit Singh | Syed Idris Syed Hassan | Mohd Fadzil Ain

Journal: American Journal of Applied Sciences
ISSN 1546-9239

Volume: 4;
Issue: 1;
Start page: 05;
Date: 2007;
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Keywords: Satellite communication | rainfall rate | rainfall attenuation

Attenuation due to rain is a primary cause of communication impairment on satellite-earthpaths, especially above 10GHz. Rainfall is a serious source of attenuation at such a frequency. Thispaper presents the characteristics of rain distribution in USM based on measured one minute rain rate.For attenuation of rain, predictions models like ITU and VIHT (Variable Isotherm Height Technique)model were used to estimate the effect of rain on Ku band signals. Data of rain attenuation and rainfallrates collected at USM are estimated and compared with the predicted models. The ITU modelfollowed closely to the measured rainfall rate and attenuation data whereas the VIHT modelsoverestimated the measured rainfall rate and attenuation data.

Tango Jona
Tangokurs Rapperswil-Jona

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