🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
ASTM-G173:2008 Edition

ASTM-G173:2008 Edition

$58.50

G173-03(2008) Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface

Published By Publication Date Number of Pages
ASTM 2008 21
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

ASTM G173-03-Reapproved2008

Historical Standard: Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface

ASTM G173

Scope

1.1 These tables contain terrestrial solar spectral irradiance distributions for use in terrestrial applications that require a standard reference spectral irradiance for hemispherical solar irradiance (consisting of both direct and diffuse components) incident on a sun-facing, 37° tilted surface or the direct normal spectral irradiance. The data contained in these tables reflect reference spectra with uniform wavelength interval (0.5 nanometer (nm) below 400 nm, 1 nm between 400 and 1700 nm, an intermediate wavelength at 1702 nm, and 5 nm intervals from 1705 to 4000 nm). The data tables represent reasonable cloudless atmospheric conditions favorable for photovoltaic (PV) energy production, as well as weathering and durability exposure applications.

1.2 The 37° slope of the sun-facing tilted surface was chosen to represent the average latitude of the 48 contiguous United States. A wide variety of orientations is possible for exposed surfaces. The availability of the SMARTS model (as an adjunct, ADJG173CD ) to this standard) used to generate the standard spectra allows users to evaluate differences relative to the surface specified here.

1.3 The air mass and atmospheric extinction parameters are chosen to provide (1) historical continuity with respect to previous standard spectra, (2) reasonable cloudless atmospheric conditions favorable for photovoltaic (PV) energy production or weathering and durability exposure, based upon modern broadband solar radiation data, atmospheric profiles, and improved knowledge of aerosol optical depth profiles. In nature, an extremely large range of atmospheric conditions can be encountered even under cloudless skies. Considerable departure from the reference spectra may be observed depending on time of day, geographical location, and changing atmospheric conditions. The availability of the SMARTS model (as an adjunct (ADJG173CD )to this standard) used to generate the standard spectra allows users to evaluate spectral differences relative to the spectra specified here.

Keywords

direct normal; hemispherical; irradiance; solar constant; solar spectrum; terrestrial; wavelength; Direct normal spectral irradiance; Hemispherical spectral irradiance; Solar spectral irradiance; Tables (measurement)–petroleum products; Direct normal spectral irradiance; Hemispherical spectral irradiance; Solar spectral irradiance; Tables (measurement)–petroleum products

ICS Code

ICS Number Code 17.180.01 (Optics and optical measurement in general)

DOI: 10.1520/G0173-03R08

PDF Catalog

PDF Pages PDF Title
1 Scope
2 Referenced Documents
Terminology
Significance and Use
3 FIG. 1
4 Technical Bases for the Tables
TABLE 1
5 Solar Spectral Irradiance
TABLE 2
14 Application of the Spectral Data to the Derivation of Effective Optical Properties
15 Validation
FIG. 2
16 Keywords
FIG. 3
17 X1. Aerosol Optical Depth
X1.1 Aerosol Optical Depth
X1.2 Selection Criteria for Aerosol Optical Depth
X1.3 Atmospheric Constituents and Absorbers
TABLE X1.1
TABLE X1.2
18 X1.4 Spectral Reflectance
X1.5 Generating Approximation to Earlier Standard Spectra
TABLE X1.3
19 FIG. X1.1
20 REFERENCES
TABLE X1.4

Related products

ASTM-G173
$58.50