Comparison of Rain Attenuation Model for Equatorial Climate

As communication technology and systems are being upgraded rapidly with the increasing world population, the frequency used will also increase. Satellite communication systems operate at a higher frequency, significantly more than 10 GHz, will face a corrupted signal quality due to rain, especially in the equatorial and tropical climate regions—high rainfall rates at equatorial climate affected satellite communication systems. Several models will be used to compare rain attenuation in selected sites to run those models in measuring the rain attenuation, including Thailand, Laos, and Brazil. All models will be given the exact rain attenuation measurement as the collected data in every site, or at least the rate is between 0.1 % to 0.01% of the time. All in all, the recommended model in predicting rain attenuation is the Karasawa, with the lowest percentage error of 0.73% at attenuation of 15.11 dB. The results are based on 99.99% of the system's availability which is at 0.01% outage in average year.