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Estimation of Global Solar Radiation Based in Temperature Observations for the Goiás State

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posted on 24.10.2018, 02:55 by Diego Simões Fernandes, Alexandre Bryan Heinemann, André de Oliveira Amorim, Rosidalva Lopes Feitosa da Paz

Abstract The objective of this work was to evaluate the performance of five models for estimating solar radiation based on temperature data for dry and wet periods in Goiás State. Climate data from 10 municipalities were used. The models performance for calibration and validation were evaluated by coefficient of determination (R2), root mean square error (RMSE), mean square relative error (RRMSE), the mean absolute error (MAE) and efficiency of model by the Nash-Sutcliff method (EF). Also, the models performance considering all data set for daily and monthly estimated solar radiation were evaluated by Willmott’s agreement coefficient, Camargo’s confidence index, spline smoothing cubic regression and linear regression. It was observed that HG and DCBB models showed the worst performance and CD and DB models the best performance for estimating solar radiation values for Goiás State.

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