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
BORCAL
2009–02
Customer:
University of Oregon
Calibration Facility:
Solar Radiation Research Laboratory
Longitude: 105.180°W
Latitude: 39.742°N
Elevation: 1828.8 meters AMSL
Time Zone: –7.0
Calibration date
06/22/2009 to 06/26/2009
Report Date
July 2, 2009
NOTICE
This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof.
Broadband Outdoor Radiometer Calibration Report
TABLE of contents
Introduction
Reference Irradiance plots
Meteorological plots
Control Instrument history plots.
Results summary
Appendix 1 Instrument Details.
Appendix 2 BORCAL Notes
BORCAL 2009–02 / University of Oregon
Introduction
This report compiles the calibration results from a Broadband Outdoor Radiometer Calibration (BORCAL). The work was accomplished at the Radiometer Calibration Facility shown on the front of this report. The calibration results reported here are traceable to the World Radiometric Reference and to the National Institute of Standards and Technology.
This report includes these sections:
Calibration Environment - meteorological conditions and irradiance reference data encountered during the event.
Control Instruments - a group of instruments included in each BORCAL event that provides a measure of process consistency.
Results Summary - a table of all instruments included in this report summarizing their calibration results and uncertainty.
Instrument Details - the calibration certificates and suggested methods of applying results for each instrument.
The BORCAL process is described in "Improved Methods for Broadband Outdoor Radiometer Calibration (BORCAL)," Wilcox, S., Andreas, A., Reda, I., and Myers, D., Proceedings of the ARM Science Team Meeting, St. Petersburg, Florida, April 2002.
Results Summary
