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One of the important limitation in designing Earth-space link telecommunication systems operating at frequencies above 10 GHz is attenuation due to rain which depends on rain height. This study observes Three-parameter Dagum distribution on the Freezing Height Level (FHL) using averaged 5-year data over Durban. The distribution shows a good fit with Root Mean Square Error of about 0.2613 when compared...
Short term rainfall climatology studies are essential for disaster management and planning in hilly areas. Uttarakhand State, India is prone to cloud burst and flooding events like one occurred at Kedarnath region in June 2013. Rain gauge stations are scarce and rainfall monitoring is difficult over this region due to rough terrain and extreme environmental conditions. Therefore, the available rainfall...
This work evaluates the spatial features of the synthetic rain cell profile based on two years of real rain cells database extracted from weather radar observation located in Kluang, Johor, Malaysia. Single rain cells modeled by an analytical exponential and Gaussian profile are evaluated and investigated based on certain features of real rain cells such as maximum rain rate and root mean square rain...
Wireless communication systems operating at above 10 GHz are exposed to rain attenuation. Therefore, countries with high precipitation rate such as Malaysia, require careful planning before establishing a reliable wireless link. Signal attenuation due to rain can be measured or estimated, but it requires the knowledge of local 1-minute rainfall rate statistic. But for most part of the world, the rainfall...
Based on a large data bank of rain rate time series, we have simulated a large data bank of rain attenuation time series at 18.7 GHz in slant paths to Italsat (13.2° E), circular polarisation, with the Synthetic Storm Technique (SST). The paper shows that 4 years of data can predict long term (~ 10 years) rain attenuation probability distributions with an average error practically zero, and an RMS...
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