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 at NPC 2022
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.
Adaptive Diffraction Corrections
The Diffraction Effect and its implications
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“ weiterlesenAn HF-Radiometer in active mode
At the IPC-XIII, Davos Instruments has been successfully operating a Hickey-Frieden (HF) radiometer from Eppley Laboratory Inc. in active mode, using a slightly modified control unit Linard.
It has been found that the HF radiometer is very well suitable for active operation. While the HF-radiometer is traditionally operated in the passive mode, it has all the necessary features needed for active mode operation.
First results have been presented in the symposium of the IPC-XIII, a preprint of the proceedings-article is available here.
Successful start of the IPC-XIII
Finally the solar radiometry crowd gathers again in Davos, Switzerland. The 13th International Pyrheliometer Comparison (IPC) has successfully started. It is a great pleasure to meet again in person and to compare our instruments together. With close to a 100 absolute cavity radiometers present, it is an excellent opportunity to independently study the performance of the radiometers. Several PMO8, manufactured by Davos Instruments, are taking part in the intercomparison. Furthermore, Davos Instruments operates an Eppley AHF-radiometer in active mode: a premiere.
„Successful start of the IPC-XIII“ weiterlesen