Solar Radiation Research Laboratory (SRRL) Final Report: Fiscal Years 2019-2021

Manajit Sengupta, Aron Habte, Yu Xie, Peter Gotseff, Mark Kutchenreiter, Afshin Andreas, Ibrahim Reda, Frank Vignola, Anton Driesse, Christian Gueymard, Soutir Bandyopadhyay, Alexis Denhard

Research output: NRELTechnical Report


The Solar Radiation Research Laboratory (SRRL) at the National Renewable Energy Laboratory (NREL) is a world-leading solar calibration and measurement facility and maintains and disseminates the World Radiation Reference (essentially the W/m2) for the United States, which is essential for traceable and accurate measurements of solar radiation at all solar generation facilities. SRRL operates two International Organization for Standardization (ISO)/International Electrotechincal Commission (IEC) 17025 calibration facilities that provide unique, high-quality calibrations to NREL and other U.S. Department of Energy laboratories. The Baseline Measurement System at SRRL provides a high-quality record of solar irradiance and surface meteorological conditions. SRRL capabilities are used to develop: improved methods for the calibration of solar radiometers; new standards through the ISO, the IEC, and ASTM International; models; advanced instrumentation and methods for operating solar measurement stations. The SRRL data sets are also critical for the validation of new models and data sets, such as the National Solar Radiation Database (NSRDB).
Original languageAmerican English
Number of pages69
StatePublished - 2022

Bibliographical note

Originally published in February 2022 and updated with errata in May 2022

NREL Publication Number

  • NREL/TP-5D00-81790


  • Baseline Measurement System
  • BMS
  • calibration
  • measurement
  • solar generation
  • Solar Radiation Research Laboratory
  • SRRL
  • World Radiation Reference
  • WRR


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