Performance Assessment of Rain Models for Lagos at 12 and 23GHz
Keywords:
Attenuation, exceedances, ka-band, ku-band, meteorology, prediction models, rain gauge, rain rate, satellite communication, slant-pathAbstract
The study of the effect of rainfall is very useful for the construction of a modern satellite system. As a result of this, attenuation of rain predictive models had been used to calculate the impact of rainfall on satellite communication for different stations. In this study, performance assessment of attenuation due to rainfall was predicted for three locations of interest; namely, Ikeja, Oshodi, and Marina in Lagos, Nigeria, using three popular prediction models viz. ITU-R, Synthetic Storm Technique (SST), and Dissanayake, Allnut and Haidara (DAH). Five (5) years of monthly rainfall data were acquired from the Nigerian Meteorological Agency (NIMET) for the selected three locations and then analyzed at different percentages of time exceedances ranging from 0.001% to 1%. Performances of the three models under investigation were assessed and compared. Generally, DAH and ITU-R rain attenuation prediction models gave the closest predicted values to measurement attenuation values, both at 12 and 23GHz; and hence the recommended models for Lagos.
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