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 currently participating in the fifth WMO Regional Pyrheliometer Comparison of WMO RA-II, jointly held with RA-V on Mount Tsukuba in Japan, an exciting event having approximately 20 absolute radiometers and many experts here. It is a great pleasure to be here and enjoy valuable discussions, excellent infrastructure and delicious meals.
Proceedings from the WMO Technical Conference on Meteorological and Environmental Instruments and Methods of Observation
(TECO-2022) are now publicly available here. Markus Suter (Davos Instruments) and Wolfgang Finsterle (PMOD/WRC) have contributed their work: Adaptive diffraction corrections in solar radiometry, a prerequisite for the ISO 9060:2018 AA class.
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