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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