sun_reference.mspct {photobiologySun}

Reference solar spectra from ASTM G173

Description

Dataset containing wavelengths and tabulated values for spectral irradiance for the sun both above the terrestrial atmosphere and at ground level under clear sky. The different spectra in this collection are from ASTM G173 standard.

Usage

sun_reference.mspct

Format

A "source_mspct" object containing 51 "source_spct" objects.

In each of the member spectra, the variables are as follows:

• w.length (nm)

• s.e.irrad (W m-2 nm-1)

Details

ASTM.E490.AM0 is the mean extraterrestrial solar spectrum, for air mass zero (AM0).

Gueymard.AM0 is Gueymard's (2004) extraterrestrial solar spectrum, for air mass zero (AM0). Used as the basis for calculating the terrestrial solar spectra defined by ASTM G173.

WMO.Wehrli.AM0 is Wehrli's (1985) extraterrestrial solar spectrum, for air mass zero (AM0). Used the World Meteorological Organization (WMO).

ASTM.G173.global is global spectral irradiance for air mass 1.5 (AM1.5). Reference Spectrum Derived from SMARTS v. 2.9.2 for AM1.5. (solar zenith angle 48.19)

ASTM.G173.direct is direct spectral irradiance for air mass 1.5 (AM1.5). Reference Spectrum Derived from SMARTS v. 2.9.2 for AM1.5. (solar zenith angle 48.19)

Note

Please see the metadata in each spectrum. Metadata is stored in attributes and can accessed with functions getWhatMeasured and comment.

Source

https://rredc.nrel.gov/solar/spectra/am1.5/ (no longer on-line).

References

ASTM (2012) ASTM G173 Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37 degrees Tilted Surface.

Gueymard, C. A. (2004) The sun's total and spectral irradiance for solar energy applications and solar radiation models. Solar Energy, 76, 423-453. <doi:10.1016/j.solener.2003.08.039>

Wehrli, C. (1985) Extraterrestrial solar spectrum. Pub. No. 615, World Radiation Center, Davos, Switzerland.

Examples

names(sun_reference.mspct)