Estimation of ultraviolet-B radiation using fourier series

Abstract EN

The daily estimation of ultraviolet-B (UV-B) radiation in-tensity is important to provide information to the public about the potential detrimental effects on health from sun exposure.

The overall goal of this paper is to initiate the relation between UV-B radiation and global radiation.

Because of the periodicity of variations in solar radiation, global and UV-B radiation, their non-dimensional values are expanded in Fourier series.

Fourier coefficients were determined by using measured global solar radiation data for four selected Egyp-tian weather stations.

These coefficients were used to calculate UV-B radiation based on global solar radiation for the same stations.

A com-parison between the observed and calculated UV-B radiation is pre-sented graphically using the error.

The comparison shows a good agreement between the observed and estimated UV-B radiation.

The method is applied to calculate the UV-B radiation for other stations with no available measurements, using records of global solar radia-tion at these stations.