Table 3 Angstrom–Prescott method for the six cities
From: Evaluation of global solar radiation from meteorological data in the Sahelian zone of Chad
Abeche | \(\frac{H}{{H_{0} }} = 0.4476 + 0.2042\left( {\frac{S}{{S_{0} }}} \right)\) | Mongo | \(\frac{H}{{H_{0} }} = 0.4603 + 0.1766\left( {\frac{S}{{S_{0} }}} \right)\) |
Ati | \(\frac{H}{{H_{0} }} = 0.4608 + 0.1758\left( {\frac{S}{{S_{0} }}} \right)\) | Moussoro | \(\frac{H}{{H_{0} }} = 0.4612 + 0.1749\left( {\frac{S}{{S_{0} }}} \right)\) |
N’Djamena | \(\frac{H}{{H_{0} }} = 0.3660 + 0.3793\left( {\frac{S}{{S_{0} }}} \right)\) | Bokoro | \(\frac{H}{{H_{0} }} = 0.4602 + 0.1769\left( {\frac{S}{{S_{0} }}} \right)\) |