Desert Rock SURFRAD station, including (clockwise from left center) radiometer platform, met tower, TSI and solar tracker.
Desert Rock SURFRAD station, including (clockwise from left center) radiometer platform, met tower, TSI and solar tracker.

NOTICE: The station pressure at Penn State drifted by about 0.4 mb per year between 11-April-2003 and 18-June-2012. Those data have been corrected and new Penn State SURFRAD daily files have been generated with corrected pressure for the affected period.

NOTICE: The README file that describes the SURFRAD data files has been updated. Please download the latest version from any of the individual station FTP data directories, e.g., ftp://aftp.cmdl.noaa.gov/data/radiation/surfrad/Bondville_IL.