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Picture 1. The front optics of the GUV 541. 


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.