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Table 6 Statistics for the validation of the selected models

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

Sites MPE (%) RMSE (kWh/m2) MBE (kWh/m2) NSE (kWh/m2)
(a) Angstrom–Prescott
Abeche −7.8073 0.9141 −0.0781 −1.5902
N’Djamena 1.2655 0.6038 0.0127 0.2408
Ati −6.4463 0.7823 −0.0645 −0.8224
Bokoro −1.5466 0.5834 −0.0155 −0.0377
Mongo −1.8291 0.5609 −0.0183 −0.0373
Moussoro −4.1310 0.6887 −0.0413 −0.3560
(b) Allen
Abeche −5.4824 0.8835 −0.0548 −1.4197
N’Djamena 0.0784 0.8275 0.0008 −0.4261
Ati −5.8254 0.9031 −0.0583 −1.4289
Bokoro 1.1811 0.799 0.0118 −0.9464
Mongo −17.506 1.2438 −0.1751 −4.1008
Moussoro −7.523 1.0278 −0.0752 −2.0198
(c) Sabbagh
Abeche 3.7042 0.5418 0.0370 0.0899
N’Djamena −0.3477 0.3842 −0.0035 0.6927
Ati 0.3564 0.2314 0.0036 0.8406
Bokoro 5.0317 0.3798 0.0503 0.5602
Mongo 4.8254 0.3722 0.0483 0.5432
Moussoro 3.4003 0.3879 0.0340 0.5697