NREL Pyrheliometer Comparisons: September 25 - October 1, 2022 (NPC-2022)

Research output: NRELTechnical Report


Accurate measurements of direct normal (beam) solar irradiance from pyrheliometers are important for developing and deploying solar energy conversion systems, for improving our understanding of Earth's energy budget for climate change studies, and for other science and technology applications involving solar flux. Providing these measurements places many demands on the quality system used by the operator of commercially available radiometers. Maintaining accurate radiometer calibrations that are traceable to an international standard is the first step in producing research-quality solar irradiance measurements.
Original languageAmerican English
Number of pages43
StatePublished - 2022

NREL Publication Number

  • NREL/TP-1900-84219


  • absolute cavity pyrheliometer
  • solar irradiance
  • World Standard Group (WSG)


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