Main page Daily values Yearly values Log in Measurement locations Instruments Graph over daily UV index Table over UV index and daily dose The weather station at Østerås Ozone map Graph over maximum UV index Graph over accumulated daily doses Table over yealy values Table over monthly values

Picture 1. The front optics of the GUV 541.  Instruments The UV network consists of 11 multiband filterradiometers of model GUV 541 and one GUV 511 from Biospherical Instruments Inc. and one Bentham BM150BC double grating spectroradiometer from Bentham Instruments Inc. Nine of the GUVs are stationary at the measurement locations. The spectroradiometer is the primary reference instrument for the network. The GUVs are temperature stabilized at 40°C and have five detector channels at 305, 313, 320, 340 and 380 nm center wavelength with a 10 nm bandwidth.