Estimation of Solar UV Irradiance Under Clear-Sky Conditions from Broadband Radiometric Measurements

It is well known that broadband solar irradiance is measured with a much higher spatial density than ultraviolet (UV) solar irradiance. Building on this, this study proposes a new model for estimating clear-sky global UV solar irradiance based on broadband radiometric measurements. The model is developed for the UV spectral range from 0.280 to 0.400 μm. The originality of the model lies in its innovative structure, empirically derived equations, and minimal input requirements, limited to global solar irradiance and atmospheric turbidity. Preliminary results demonstrate that the proposed model achieves a stable and well-balanced trade-off between simplicity and accuracy. A notable advantage of the model is its reliance on minimal inputs, enabling application over large geographical areas.