Annual Average Direct Normal (DNI) Solar Resource, Slope Under 5 Pct, California

Aug 17, 2015 (Last modified Dec 30, 2017)
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Description:
Measured in kWh/m2/day

Original dataset clipped to California by CBI.

This data provides monthly average and annual average daily total solar resource averaged over surface cells of 0.1 degrees in both latitude and longitude, or about 10 km in size. The insolation values represent the resource available to concentrating systems that track the sun throughout the day. The data are created using the SUNY Satellite Solar Radiation model (Perez, et.al., 2002). The data are averaged from hourly model output over 12 years (1998-2009). This model uses hourly radiance images from geostationary weather satellites, daily snow cover data, and monthly averages of atmospheric water vapor, trace gases, and the amount of aerosols in the atmosphere to calculate the hourly total insolation (sun and sky) falling on a horizontal surface. The direct beam radiation is then calculated using the atmospheric water vapor, trace gases, and aerosols, which are derived from a variety of sources. Where possible, existing ground measurement stations are used to validate the data.

Annual average direct normal resource data (as described above), filtered to eliminate areas with slope greater than or equal to 5%. Percent slope is calculated using the U.S. Geological Survey National Elevation Dataset at a 1 arc second (nominally 90 m) resolution.

Source: Perez-SUNY/NREL, 2012

Link: http://www.nrel.gov/gis
Data Provided By:
National Renewable Energy Laboratory (NREL)

http://www.nrel.gov/gis/data_solar.html
Content date:
Dataset updated 2012
Contact Organization:
NREL
Contact Person(s):
  • Nick Grue
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Creative Commons LicenseThis work is licensed under a Creative Commons Attribution 3.0 License.
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Tags:
dni, direct normal, renewable energy, nrel, 5 percent slope, california, solar
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