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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Switzerland, PMOD/WRC(CH) (Physikalisch-Meteorologisches Obseratorium Davos and World Radiation Center)
Properties of detectors ,
Responsivity, solar, irradiance
:
1.00E-4 V (W/m2)-1 to 0.1 V (W/m2)-1
Broadband detector
Relative expanded uncertainty
:
3.5 %
Radiometer to spectroradiometer comparison
Global solar UV irradiance : 0.1 Wm-2 to 50 Wm-2
Type of source : Sun and clear or cloudy sky
Angle between normal of receiver surface and solar beam : 23 degree to 50 degree
Inclination : horizontal
Total column ozone (atmospheric) : 2 mm to 5 mm STP (200 to 500 Dobson units)
Weighting: uniform, 280 nm to 400 nm Wavelength range: 280 nm to 400 nm
Approved on 28 November 2018
Properties of detectors ,
Responsivity, solar, irradiance
:
1.00E-4 V (W/m2)-1 to 40 V (W/m2)-1
Broadband detector
Relative expanded uncertainty
:
3.1 %
Radiometer to spectroradiometer comparison
Global solar UV irradiance, UV index : 0.1 to 10
Type of source : Sun and clear or cloudy sky
Angle between normal of receiver surface and solar beam : 23 degree to 50 degree
Inclination : horizontal
Total column ozone (atmospheric) : 2 mm to 5 mm STP (200 to 500 Dobson units)
Weighting: Erythema CIE Wavelength range: 280 nm to 400 nm
Approved on 28 November 2018
Properties of detectors ,
Responsivity, solar, irradiance
:
1.00E-4 V (W/m2)-1 to 0.1 V (W/m2)-1
Broadband detector
Relative expanded uncertainty
:
3 %
Radiometer to spectroradiometer comparison
Global solar UVA irradiance : 0.1 Wm-2 to 50 Wm-2
Type of source : Sun and clear or cloudy sky
Angle between normal of receiver surface and solar beam : 23 degree to 50 degree
Inclination : horizontal
Total column ozone (atmospheric) : 2 mm to 5 mm STP (200 to 500 Dobson units)
Weighting: uniform, 315 nm to 400 nm Wavelength range: 315 nm to 400 nm
Approved on 28 November 2018
Properties of detectors ,
Responsivity, solar, irradiance
Pyranometer
Relative expanded uncertainty
:
0.66 %
Pyrheliometer, pyranometer comparison
Inclination : 0.0 degree
Angle between normal of receiver surface and solar beam : 24 degrees to 50 degrees
Mean global solar irradiance : 800 W/m2 to 1000 W/m2
Reference system : World Radiometric Reference (WRR)
Type of source : Sun and clear sky
Approved on 07 February 2020
Properties of detectors ,
Responsivity, solar, spectral, irradiance
Solar spectroradiometer
Relative expanded uncertainty
:
1.7 %
Spectroradiometer to spectroradiometer comparison
Wavelength range : 310 nm to 500 nm
Bandwidth : 0.2 nm to 10 nm
Spectral irradiance : 0.0001 (W/m2)/nm to 2.5 (W/m2)/nm
Approved on 03 May 2019
Properties of detectors ,
Responsivity, solar, spectral, irradiance
Solar spectroradiometer
Relative expanded uncertainty
:
7.3 %
Spectroradiometer to spectroradiometer comparison
Wavelength range : 300 nm to 310 nm
Bandwidth : 0.2 nm to 10 nm
Spectral irradiance : 0.0001 (W/m2)/nm to 0.7 (W/m2)/nm
Approved on 03 May 2019
Properties of detectors ,
Responsivity, solar, irradiance
Pyrheliometer
Relative expanded uncertainty
:
0.12 %
Pyrheliometer comparison
Mean direct solar irradiance : 800 W/m2 to 1000 W/m2
Type of source : Sun and clear sky
Reference system : World Radiometric Reference (WRR)
Ambient air temperature : -15 °C to +30 °C
Ambient air temperature: +5 °C to +30 °C. Uncertainty for deviation of WRR with respect to SI is smaller than 0.3%.
Approved on 07 February 2020
Properties of detectors ,
Responsivity, solar, irradiance
:
1.00E-4 V (W/m2)-1 to 2 V (W/m2)-1
Broadband detector
Relative expanded uncertainty
:
3 %
Radiometer to spectroradiometer comparison
Global solar UVB irradiance : 0.1 Wm-2 to 1.5 Wm-2
Type of source : Sun and clear or cloudy sky
Angle between normal of receiver surface and solar beam : 23 degree to 50 degree
Inclination : horizontal
Total column ozone (atmospheric) : 2 mm to 5 mm STP (200 to 500 Dobson units)
Weighting: uniform, 280 nm to 315 nm Wavelength range: 280 nm to 315 nm
Approved on 28 November 2018
