Empirical Relationship for Ultraviolet Solar Radiation Over Egypt

The ultraviolet component of solar radiation was measured in Egypt
for the last years by the Meteorological Authority of Egypt, in Cairo and
Aswan stations. Cairo represents the typical weather conditions for Lower
Egypt and Aswan represents the typical weather conditions for Upper Egypt.
Measured data of global and ultraviolet solar radiation in Cairo and Aswan
for the period (1990-1992) have been processed, arranged, discussed and
used to investigate an empirical relationship with correlation coefficient
96%. This empirical relationship was used in calculating the ultraviolet
component of solar radiation in Cairo, Aswan and other selected
locations(Matrough, Al-Arish, Bahtim and Al-Kharga) during other two
years (1993 and 1994). The calculated values of ultraviolet radiation were
compared with the measured data at both Cairo and Aswan sites and were
in a good agreement. This encourages the use of the empirical formula in
calculating the components of ultraviolet solar radiation at any other
location over Egypt .