Davos Instruments is comparing a PMO8 radiometer to the irradiance reference of the Laboratory for Atmospheric Science (LASP) and Space Physics at the University of Colorado in Boulder. LASP’s total solar irradiance radiometer facility (TRF) allows to compare the PMO8 to the NIST traceable reference radiometer NACR5 (White et al. 2022) in a indoor laboratory environment.
Another exciting pyrheliometer comparison is taking place: The Baltic Region Pyrheliometer Comparison (BRPC), hosted by SMHI, the Swedish Meteorological and Hydrological Institute. Davos Instruments is very pleased to participate in this event.
Davos Instruments is participating in the NREL Pyrehliometer Comparison in Golden USA. Davos Instruments is sucessfully operating two PMO8 radiometers with Linard control units. It is the first time, PMO8 radiometers are taking part in this comparison event at NREL.
Diffraction effects in solar radiometry become more and more important once the target uncertainty goes below 0.1%. At the radiometric two aperture system, diffraction occurs at the front aperture, and thus reduces or enhances the amount of solar radiation passing the second aperture and reaching the detector. This strongly wavelength dependent effect has an impact in the order of 0.1% and can increase by up to 50% depending on the spectral conditions. This leads to an error in the measurement that needs to be corrected if high accuracy is needed.
„Adaptive Diffraction Corrections“ weiterlesen
