Figure 8. Instantaneous direct radiation as a function of tilt angle

From

Study of A Theoretical and Experimental Model of Direct Solar Radiation At the University of Agadez Experimental Site in Niger

Seydou DJIKA, Harouna SANI DAN NOMAO, Makinta BOUKAR, Saidou MADOUGOU

International Journal of Physics. 2026, 14(3), 55-60 doi:10.12691/ijp-14-3-1