A description of the GUV-511 radiometer and its calibration procedure can be found here.

Note: The parameterization of action spectra that were used for the generation of GUV data products may be different from the parameterization used by other researchers. For example, the normalization of action spectra is often not unambiguously defined. We advise data users to compare their parameterizations with ours (accessible through the last column below) before using the data.

Data product	Description	Unit	Action spectrum / further information
Spectral Irradiances:
305nm	Spectral irradiance at 305 nm	µW/(cm2 nm)	Action spectrum1
320nm	Spectral irradiance at 320 nm	µW/(cm2 nm)	Action spectrum1
340nm	Spectral irradiance at 340 nm	µW/(cm2 nm)	Action spectrum1
380nm	Spectral irradiance at 380 nm	µW/(cm2 nm)	Action spectrum1
400nm	Spectral irradiance at 400 nm	µW/(cm2 nm)	Action spectrum1,2
500nm	Spectral irradiance at 500 nm	µW/(cm2 nm)	Action spectrum1,2
600nm	Spectral irradiance at 600 nm	µW/(cm2 nm)	Action spectrum1,2
Comments: 1The "action spectra" for the calculation of spectral irradiances are triangular functions with a bandwidth of 1 nm FWHM centered at the specified wavelengths. 2Spectral irradiances at 400, 500, and 600 nm are extrapolated from spectral irradiances measured at 340 and 380 nm. Values should be treated with caution due to uncertainties of this extrapolation.
Integrals:
UVB315	Spectral irradiance integrated from 290 - 315 nm	µW/cm2	Action spectrum
UVB320	Spectral irradiance integrated from 290 - 320 nm	µW/cm2	Action spectrum
UVA315-360	Spectral irradiance integrated from 315 - 360 nm	µW/cm2	Action spectrum
UVA320-360	Spectral irradiance integrated from 320 - 360 nm	µW/cm2	Action spectrum
UVA360-400	Spectral irradiance integrated from 360 - 400 nm	µW/cm2	Action spectrum
UVA315-400	Spectral irradiance integrated from 315 - 400 nm	µW/cm2	Action spectrum
UVA320-400	Spectral irradiance integrated from 320 - 400 nm	µW/cm2	Action spectrum
VIS	Spectral irradiance integrated from 400 - 600 nm	µW/cm2	Action spectrum3
Comments: 3The integral calculated from the 400 - 600 nm range was extrapolated from spectral irradiances measured at 340 and 380 nm. Values should be treated with caution due to uncertainties of this extrapolation.
Dose-rates:
Dose1	Erythema (Komhyr and Machta, 1973)	µW/cm2	Action spectrum
Dose2	Erythema (Diffey, 1987)	µW/cm2	Action spectrum
CIE	Erythema (CIE weighting function)	µW/cm2	Action spectrum
UVIndex	UV Index4		Action spectrum
Erythema_Anders	Erythema (Anders et al., 1995 )	1/s	Action spectrum
RBM501	RBM-weighted irradiance	µW/cm2	Action spectrum
SetlowBSI	DNA damage (Setlow, 1974; BSI parameterization)	µW/cm2	Action spectrum
SetlowBSI_300	DNA damage (Setlow,1974; BSI parameterization normalized at 300 nm)	µW/cm2	Action spectrum
SetlowTUV	DNA damage (Setlow,1974; TUV parameterization)	µW/cm2	Action spectrum
SetlowNDSC.txt	DNA damage (Setlow, 1974; NDSC parameterization)	µW/cm2	Action spectrum
SCUP-h	Skin cancer in mice corrected for human skin (Gruijl et al., 1993)	µW/cm2	Action spectrum
SCUP-m	Skin cancer in mice (Gruijl et al., 1993)	µW/cm2	Action spectrum
Caldwell	Generalized plant response (Caldwell 1971)	µW/cm2	Action spectrum
Flint	Plant growth (Flint and Caldwell, 2003)	µW/cm2	Action spectrum
Hunter	Damage to northern anchovy (Hunter, 1979)	µW/cm2	Action spectrum
Boucher	Inhibition of phytoplankton carbon fixation (Boucher et al., 1994)	(mg C) / (mg chl * s)	Action spectrum
Cullen_phaerodactylum	Inhibition of phytoplankton photosynthesis of phaeodactylum (Cullen et al., 1994)		Action spectrum
Cullen_prorocentrum	Inhibition of phytoplankton photosynthesis of prorocentrum (Cullen et al., 1994)		Action spectrum
Neale_Antarctic	Inhibition of photosynthesis in Antarctic phytoplankton (Cullen and Neale, 1997)		Action spectrum
TSI	TSI-weighted irradiance	µW/cm2	Action spectrum
GUV29236_305_17May03	Response function of GUV S/N 29236, 305 nm channel	µW/cm2	Action spectrum
GUV29236_320_17May03	Response function of GUV S/N 29236, 320 nm channel	µW/cm2	Action spectrum
GUV29236_340_17May03	Response function of GUV S/N 29236, 340 nm channel	µW/cm2	Action spectrum
GUV29236_380_17May03	Response function of GUV S/N 29236, 380 nm channel	µW/cm2	Action spectrum
Comments: 4UV Index is a unit of measure of UV levels relevant to the effects on human skin. It serves as a vehicle to raise public awareness about the potential detrimental effects on health from solar UV exposure and to alert people of the need to adopt protective measures. The UV index is defined as erythemally (CIE) weighted irradiance, expressed in the units W/mē, and multiplied by 40. Note that the UV Index is a dimensionless number. More information can be found here.
Additional data products:
PAR	Photosynthetically Active Radiation	µE/(cm2s)	Action spectrum
TotalOzone	Total column Ozone	Dobson Units