International UV Filter Radiometer Comparison (UVC-III) 2022

From 13 June to 26 August 2022, the World Calibration Center for UV will organize the third International UV Filter Radiometer comparison (UVC-III) as part of the WMO/GAW program.

Institutes which would like to participate should contact G. Hülsen ( or J. Gröbner (

Further information will be available on the PMOD/WRC website at:


The characterization and calibration activities will cover:

  • Spectral Responsivity
  • Angular Responsivity
  • Solar irradiance responsivity calibration traceable to the SI (supported by CMC's within the CIPM MRA*)


The calibration is free-of-charge, instrument shipping costs are the responsibility of the participants.


PMOD/WRC follows the requirements for the competence of testing and calibration laboratories according to ISO/IEC 17025. PMOD/WRC is a designated institute of the Swiss Federal Office of Metrology, the Swiss signatory of the CIPM MRA (International Committee for Weights and Measures - Mutual Recognition Arrangement).