Appendix G: BORCAL Report
The following pages in Appendix G provide a sample broadband outdoor radiation calibration (BORCAL) report for instruments calibrated at the National Renewable Energy Laboratory (NREL) Solar Radiation Research Laboratory (SRRL). The BORCAL process is based on the summation method for calibration of pyranometers and direct comparison of pyrhelometers with electrically self-calibrating absolute cavity radiometers traceable to the World Radiometric Reference (see Chapter 4). BORCAL reports for many instruments can be found at http://www.nrel.gov/aim/borcal.xhtml. Recently SRRL calibrations have become ISO certified, and this has resulted in some changes in the BORCAL reports.
Broadband Outdoor Radiometer Calibration
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