Abstract:
The UV irradiance data from April to May in 2003 were obtained in Kunming by field observation with five ultraviolet radiation instruments.Based on these data,observational comparison and basic analysis are presented for different instruments and different wavelengths.The temporal-spatial characteristics of UV irradiance,whose center-wavelength is 297,312?nm and 365?nm respectively,are gained via comparing the UV data.Furthermore,by using all-day observation,it is found the daily variation characteristics of the radiation intensity derived from the observations of UV meters in spring.Finally,by comparison with other data,such as those of sun altitude and total ozone in the same period,it has been also arrived at some interesting results.