[1] Mabasa, B., Lysko, M. D., & Moloi, S. J. (2022). Comparison of Satellite-Based and Ångström–Prescott Estimated Global Horizontal Irradiance under Different Cloud Cover Conditions in South African Locations. Solar, 2(3), 354-374. DOI: 10.3390/solar2030021

[2] Benti, N. E., Aneseyee, A. B., Asfaw, A. A., Geffe, C. A., Tiruye, G. A., & Mekonnen, Y. S. (2022). Estimation of global solar radiation using sunshine-based models in Ethiopia. Cogent Engineering, 9(1), 2114200. DOI: 10.1080/23311916.2022.2114200

[3] Mohammadi, B., Moazenzadeh, R., Bao Pham, Q., Al-Ansari, N., Ur Rahman, K., Tran Anh, D., & Duan, Z. (2022). Application of ERA-Interim, empirical models, and an artificial intelligence-based model for estimating daily solar radiation. Ain Shams Engineering Journal, 13(1), 101498. DOI: https://doi.org/10.1016/j.asej.2021.05.012

[4] Khalil, S. A. (2022). Performance Evaluation and Statistical Analysis of Solar Energy Modeling: A Review and Case Study. Journal of the Nigerian Society of Physical Sciences, 911-911. DOI: 10.46481/jnsps.2022.911

[5] Banihashemi Dehkordi, S. N., Bakhtiari, B., Qaderi, K., & Ahmadi, M. M. (2022). Calibration and validation of the Angstrom–Prescott model in solar radiation estimation using optimization algorithms. Scientific Reports, 12(1), 4855. DOI: 10.1038/s41598-022-08744-6

[6] Bounoua, Z., Ouazzani Chahidi, L., & Mechaqrane, A. (2021). Estimation of daily global solar radiation using empirical and machine-learning methods: A case study of five Moroccan locations. Sustainable Materials and Technologies, 28, e00261. DOI: https://doi.org/10.1016/j.susmat.2021.e00261

[7] Kumari, P., & Toshniwal, D. (2021). Analysis of ANN-based daily global horizontal irradiance prediction models with different meteorological parameters: a case study of mountainous region of India. International Journal of Green Energy, 18(10), 1007-1026. DOI: 10.1080/15435075.2021.1890085

[8] Angstrom, A. (1924). Solar and terrestrial radiation. Report to the international commission for solar research on actinometric investigations of solar and atmospheric radiation. Quarterly Journal of the Royal Meteorological Society, 50(210), 121-126. DOI: https://doi.org/10.1002/qj.49705021008

[9] Iradukunda, C., & Chiteka, K. (2023). Angstrom-Prescott Type Models for Predicting Solar Irradiation for Different Locations in Zimbabwe [empirical coefficients; Angstrom-Prescott models; solar irradiation; sunshine duration;]. 2023, 69(1-2), 17. DOI: 10.5545/sv-jme.2022.331

[10] Pelkowski, J. (2009). A physical rationale for generalized Ångström–Prescott regression. Solar Energy, 83(7), 955-963. DOI: https://doi.org/10.1016/j.solener.2008.12.011

[11] Asilevi, P. J., Quansah, E., Amekudzi, L. K., Annor, T., & Klutse, N. A. B. (2019). Modeling the spatial distribution of Global Solar Radiation (GSR) over Ghana using the Ångström-Prescott sunshine duration model. Scientific African, 4, e00094. DOI: 10.1016/j.sciaf.2019.e00094

[12] Liu, Y., Tan, Q., & Pan, T. (2019). Determining the Parameters of the Ångström-Prescott Model for Estimating Solar Radiation in Different Regions of China: Calibration and Modeling. Earth and Space Science, 6(10), 1976-1986. DOI: 10.1029/2019EA000635

[13] Hargreaves, G. H., & Samani, Z. A. (1982). Estimating Potential Evapotranspiration. Journal of the Irrigation and Drainage Division, 108(3), 225-230. DOI: 10.1061/JRCEA4.0001390

[14] De Souza, K. (2018). Temperature-based model for monthly average hourly global solar radiation for the Caribbean island of Trinidad. Journal of Renewable and Sustainable Energy, 10(3). DOI: 10.1063/1.5000817

[15] Ghazouani, N., Bawadekji, A., El-Bary, A. A., Elewa, M. M., Becheikh, N., Alassaf, Y., & Hassan, G. E. (2022). Performance Evaluation of Temperature-Based Global Solar Radiation Models—Case Study: Arar City, KSA. Sustainability, 14(1), 35. DOI: 10.3390/su14010035

[16] Jamil, B., Irshad, K., Algahtani, A., Islam, S., Ali, M. A., & Shahab, A. (2020). On the calibration and applicability of global solar radiation models based on temperature extremities in India. Environmental Progress & Sustainable Energy, 39(1), 13236. DOI: 10.1002/ep.13236

[17] Manisha, Upadhyaya, A., & Gaur, P. (2020, December). Evaluation of Empirical Models for the Assessment of Global Solar Radiation in Baramati Region, Maharashtra (Paper presented at the 2020 IEEE 17th India Council International Conference (INDICON),  DOI: 10.1109/INDICON49873.2020.9342088

[18] Ahamed, M. S., Guo, H., & Tanino, K. (2022). Cloud cover-based models for estimation of global solar radiation: A review and case study. International Journal of Green Energy, 19(2), 175-189. DOI: 10.1080/15435075.2021.1941043

[19] Yakoubi, H., El Mghouchi, Y., Abdou, N., Hajou, A., & Khellouki, A. (2021). Correlating clearness index with cloud cover and other meteorological parameters for forecasting the global solar radiation over Morocco. Optik, 242, 167145. DOI: https://doi.org/10.1016/j.ijleo.2021.167145

[20] Rughoo, D., Mohun, S., & Doorga, J. R. S. (2022, December). Implementation of a cloud-based solar radiation model using Regression Analysis for estimating photovoltaic power generation (Paper presented at the 2022 7th International Conference on Environment Friendly Energies and Applications (EFEA),  DOI: 10.1109/EFEA56675.2022.10063817

[21] Kaplan, Y. A., Saraç, M. S., & Ünaldı, G. G. (2022). Developing a new model in solar radiation estimation with genetic algorithm method. Environmental Progress & Sustainable Energy, 41(6), e13912. DOI: 10.1002/ep.13912

[22] Okundamiya, M. S., & Nzeako, A. N. (2010). Empirical Model for Estimating Global Solar Radiation on Horizontal Surfaces for Selected Cities in the Six Geopolitical Zones in Nigeria. Journal of Applied Sciences, Engineering and Technology, 2(8), 805-812. DOI: 10.1155/2011/356405

[23] Soneye-Arogundade, O. O., & Rappenglück, B. (2023). Estimation of Diffuse Solar Radiation Models for a Tropical Site in Nigeria. Pure and Applied Geophysics, 1--16. DOI: 10.1007/s00024-023-03330-x

[24] Mudasiru, M. (2019). Estimation of Global Solar Radiation on Horizontal Surface in Kano, Nigeria Using Air Temperature Amplitude. International Journal of Integrated Engineering, 11(6), 103-109. DOI: 10.30880/ijie.2019.11.06.011

[25] Salisu, S., Mustafa, M. W., Mustapha, M., Otuoze, A. O., & Mohammed, O. O. (2019). A Hybrid PSO-ANFIS Approach for Horizontal Solar Radiation Prediction in Nigeria. ELEKTRIKA- Journal of Electrical Engineering, 18(2), 23-32. DOI: 10.11113/elektrika.v18n2.153

[26] Adeniji, N., Akinpelu, J., Adeola, S., & Adeniji, J. (2019). Estimation of global solar radiation, sunshine hour distribution and clearness index in Enugu, Nigeria. Journal of Applied Sciences and Environmental Management, 23(2), 345-349. DOI: 10.4314/jasem.v23i2.22

[27] Nwokolo, S. C., Amadi, S. O., Obiwulu, A. U., Ogbulezie, J. C., & Eyibio, E. E. (2022). Prediction of global solar radiation potential for sustainable and cleaner energy generation using improved Angstrom-Prescott and Gumbel probabilistic models. Cleaner Engineering and Technology, 6, 100416. DOI: https://doi.org/10.1016/j.clet.2022.100416

[28] Akpootu, D., Alaiyemola, S., Abdulsalam, M., Bello, G., Umar, M., Aruna, S., Isah, A., Aminu, Z., Abdullahi, Z., & Badmus, T. (2023). Sunshine and Temperature Based Models for Estimating Global Solar Radiation in Maiduguri, Nigeria. Saudi J Eng Technol, 8(5), 82-90. DOI: 10.36348/sjet.2023.v08i05.001

[29] Ozoegwu, C. G. (2018). New temperature-based models for reliable prediction of monthly mean daily global solar radiation. Journal of Renewable and Sustainable Energy, 10(2). DOI: 10.1063/1.5006805

[30] Dike, V. N., Chineke, T. C., Nwofor, O. K., & Okoro, U. K. (2011). Evaluation of horizontal surface solar radiation levels in southern Nigeria. Journal of Renewable and Sustainable Energy, 3(2), 023101. DOI: 10.1063/1.3558871

[31] Bawonda, F. I., & Adefarati, T. (2023). Evaluation of solar energy potential in six geopolitical regions of Nigeria using analytical and simulation techniques. Energy Conversion and Management, 290, 117193. DOI: https://doi.org/10.1016/j.enconman.2023.117193

[32] Ramgolam, Y. K., & Soyjaudah, K. M. S. (2019). Assessment and validation of global horizontal radiation: a case study in Mauritius. International Journal of Green Energy, 16(14), 1317-1328. DOI: 10.1080/15435075.2019.1671407

[33] Hailu, E., Salau, A. O., & Godebo, A. J. (2021). Assessment of solar energy potential of east gojjam zone Ethiopia using angestrom-prescott model. International Journal of Engineering Research in Africa, 53, 171-179. DOI: 10.1007/978-3-030-80621-7_28

[34] Gürel, A. E., Ağbulut, Ü., Bakır, H., Ergün, A., & Yıldız, G. (2023). A state of art review on estimation of solar radiation with various models. Heliyon. DOI: 10.1016/j.heliyon.2023.e13167

[35] Ikotoni, F. B., Haruna, I., Isah, Y. J., & Ige, O. O. (2019, 2019). Solar Radiation Potential Using Surface Meteorological Data: (A Case Study of Lokoja City, Kogi State) (Paper presented at the 2019 IEEE PES/IAS PowerAfrica Conference, Abuja.) DOI: 10.1109/PowerAfrica.2019.8928725

[36] NiMeT. Nigerian Meteorological Agency. In  https://nimet.gov.ng/

[37] NBET. Irradiation Map Of Nigeria. Retrieved June 6, 2022 from https://nbet.com.ng/irradiationmap.html

[38] Bailek, N., Bouchouicha, K., Abdel-Hadi, Y. A., El-Shimy, M., Slimani, A., Jamil, B., & Djaafari, A. (2020). Developing a new model for predicting global solar radiation on a horizontal surface located in Southwest Region of Algeria. NRIAG Journal of Astronomy and Geophysics, 9(1), 341-349. DOI: 10.1080/20909977.2020.1746892

[39] Kalogirou, S. A. (2009). Solar energy engineering processes and systems: Academic press DOI: https://doi.org/10.1016/B978-0-12-374501-9.X0001-5

[40] Sen, Z. (2008). Solar energy fundamentals and modeling techniques: atmosphere, environment, climate change and renewable energy: Springer Science & Business Media DOI: https://doi.org/10.1007/978-1-84800-134-3