Review and testing analysis of Moupfouma rain rate model for Southern India

• Rain rate modeling imperative for propagation studies in India is attempted.
• The climatic dependent parameters of the Moupfouma model are redefined and validated.
• The slope governing parameters of Moupfouma model are acclimatized for south India.
• Moupfouma model parameters, λ=0.7983, γ=0.02129 are acclimatized for southern India.
• Relative errors with refined parameters are in the range ±14%, ±1% at P=0.001% and 0.01%.

Suitability of the analytical model by Moupfouma in modeling the one-minute rain rate distributions at tropical stations of Thiruvananthapuram and Gadanki is studied. The Climatic dependent parameters of the model governing the slope of the one-minute rain rate distributions are acclimatized and validated. The paper also presents rain rate distributions for Thiruvananthapuram and Gadanki. Performance of the model with newly refined climatic dependent parameters is assessed. The Moupfouma model is observed to model the one minute rain rate distributions with a maximum percentage relative error of 14% at 0.001% of time, and with approximately zero relative error at 0.01% of time in an average year. The climatic dependent parameters governing the slope of one-minute rain rate distributions are proposed for Southern India.