Conversion of 15-minutes to 1-minute rain attenuation derived from tropical rain attenuation measurement

Rain attenuation is considered as one of the main factors that influence significantly the wireless communications path at frequencies above 10 GHz. There are methods of predicting rain attenuation in different frequencies and conditions, most of these methods largely dependent on the knowledge of rainfall per minute. For this reason, several studies are published to convert rainfall from different time periods to one minute rainfall rate. In this paper, we proposed a method to convert the rain attenuation from 15-minutes to 1-minute long term rain attenuation derived from tropical terrestrial rain attenuation measurement. We implemented this method on one year 15-minutes rain attenuation over microwave links operating at 15 GHz. The analysis results show that the method can convert rain attenuation from 15-minutes to 1-minute based on the degree of the correlation coefficients.