The study focuses on the evaluation of global solar radiation on a horizontal level. The estimate of the solar layer was made on the basis of mathematical model obtained from the relations of Angstrom–Prescott, Allen and Sabbagh. The different proposed models have been implemented by using MATLAB and Excel. The models were evaluated using MPE, NSE, RMSE and MBE. The outcome of this shows that the Angstrom–Prescott model is the most suitable for the calculation of global solar radiation in the sites of Mongo with values of 5.887 kWh/m2. For the site of Bokoro, the Allen model is the most adapted for the calculation of global solar radiation which is 5.872 kWh/m2. On the other hand, the Sabbagh model is appropriate for the sites of Abeche, N’Djamena, Ati and Moussoro with respective values of 6.354, 5.742, 5.523 and 6.126 kWh/m2. The obtained results show that the Sahelian zone of Chad has a good solar potential and consequently suitable for the exploitation of solar energy systems.

中文翻译：

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根据乍得萨赫勒地区的气象数据评估全球太阳辐射

这项研究侧重于对全球太阳辐射水平的评估。太阳层的估计是基于从Angstrom–Prescott，Allen和Sabbagh的关系获得的数学模型进行的。通过使用MATLAB和Excel已实现了不同的建议模型。使用MPE，NSE，RMSE和MBE对模型进行了评估。结果表明，Angstrom-Prescott模型最适用于计算Mongo站点的全球太阳辐射，其数值为5.887 kWh / m2。对于Bokoro站点，Allen模型最适合用于计算5.872 kWh / m2的全球太阳辐射。另一方面，Sabbagh模型适用于Abeche，N'Djamena，Ati和Moussoro的站点，其各自值为6.354、5.742、5.523和6.126 kWh / m2。