Hourly solar radiation in Langleys and three-digit data-source flag associated with the data, January 1, 1948 - September 30, 2015

The text file "Solar radiation.txt" contains hourly data and associated data-source flag from January 1, 1948, to September 30, 2015. The primary source of the data is the Argonne National Laboratory, Illinois. The first four columns give year, month, day and hour of the observation. Column 5 is the data in Langleys. Column 6 is the three-digit data-source flag to identify the solar radiation data processing and they indicate if the data are original or missing, the method that was used to fill the missing periods, and any other transformations of the data. Bera (2014) describes in detail an addition of a new flag based on the regression analysis of the backup data series at St. Charles (STC) for water years (WY) 2008–10. The user of the data should consult Over and others (2010) and Bera (2014) for the detailed documentation of this hourly data-source flag series.
Reference Cited:
Over, T.M., Price, T.H., and Ishii, A.L., 2010, Development and analysis of a meteorological database, Argonne National Laboratory, Illinois: U.S. Geological Survey Open File Report 2010-1220, 67 p., http://pubs.usgs.gov/of/2010/1220/. Bera, M., 2014, Watershed Data Management (WDM) database for Salt Creek streamflow simulation, DuPage County, Illinois, water years 2005-11: U.S. Geological Survey Data Series 870, 18 p., http://dx.doi.org/10.3133/ds870.