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Table 5 Sabbagh model for the six cities

From: Evaluation of global solar radiation from meteorological data in the Sahelian zone of Chad

Sites S S 0 (h) RH (%) T max (°C) S/S 0 H (kWh/m2) Err (%)
Abeche 11.62 11.39 36 37.42 1.02 6.354 3.704
N’Djamena 8.74 11.47 44.85 36.38 0.76 5.742 −0.348
Ati 12.09 11.42 39.52 36.22 1.06 6.151 0.356
Bokoro 12.08 11.46 42.13 36.73 1.05 6.189 5.032
Mongo 12.09 11.47 36.37 36.45 1.05 6.195 4.825
Moussoro 12.1 11.4 33.18 35.56 1.06 6.126 3.4