From: Global solar radiation estimation from commonly available meteorological data for Bangladesh
Model no. | Model type | Seasons | Equations | \(R^{2}\) | MBE | MPE | RMSE | MARE | t stat |
---|---|---|---|---|---|---|---|---|---|
7 | Linear | Summer (February–September) | \(H/H_0 = 0.5077(S/S_0) + 0.1915\) | 0.96833 | 0.00131 | 0.09172 | 0.12833 | 0.02795 | 0.03394 |
Winter (October–January) | \(H/H_0 = 0.8805(S/S_0) - 0.1174\) | ||||||||
8 | Quadratic | Summer (February–September) | \(H/H_0 = 0.5469(S/S_0)^2 - 0.0692(S/S_0) + 0.3315\) | 0.97693 | 0.0023 | 0.05783 | 0.10953 | 0.02242 | 0.06984 |
Winter (October–January) | \(H/H_0 = 9.3987(S/S_0)^2 - 11.518(S/S_0) + 3.9476\) | ||||||||
9 | Third degree | Summer (February–September) | \(H/H_0 = -1.6819(S/S_0)^3 + 3.2167(S/S_0)^2 - 1.4324(S/S_0) + 0.5545\) | 0.98538 | −0.00178 | 0.09116 | 0.08719 | 0.01302 | 0.06798 |
Winter (October–January) | \(H/H_0 = 1290(S/S_0)^3 - 2585.5(S/S_0)^2 + 1723.8(S/S_0) - 381.77\) | ||||||||
10 | Exponential | Summer (February–September) | \(H/H_0 = 0.2523\exp [1.1088(S/S_0)]\) | 0.97284 | 0.00425 | 0.04336 | 0.11886 | 0.02535 | 0.11858 |
Winter (October–January) | \(H/H_0 = 0.1341\exp [1.8733(S/S_0)]\) | ||||||||
11 | Logarithmic | Summer (February–September) | \(H/H_0 = 0.254\hbox {ln}(S/S_0) + 0.6323\) | 0.95165 | −0.00049 | 0.1278 | 0.1586 | 0.03468 | 0.01023 |
Winter (October–January) | \(H/H_0 = 0.5763\hbox {ln}(S/S_0) + 0.705\) | ||||||||
12 | Power | Summer (February–September) | \(H/H_0 = 0.6617(S/S_0)^{0.5567}\) | 0.96336 | 0.00293 | 0.05992 | 0.13805 | 0.029 | 0.07044 |
Winter (October–January) | \(H/H_0 = 0.7715(S/S_0)^{1.227}\) |