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ASTM G 173 : 2003 : R2020

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface
Available format(s)

Hardcopy , PDF

Superseded date

08-18-2023

Language(s)

English

Published date

07-14-2020

1.1These 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.

1.2The 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, ADJG173CD3) to this standard) used to generate the standard spectra allows users to evaluate differences relative to the surface specified here.

1.3The 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 (ADJG173CD3)to this standard) used to generate the standard spectra allows users to evaluate spectral differences relative to the spectra specified here.

1.4This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee
G 03
DocumentType
Standard
Pages
21
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM E 948 : 2016 : R2020 Standard Test Method for Electrical Performance of Photovoltaic Cells Using Reference Cells Under Simulated Sunlight
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ASTM E 927 : 2019 Standard Classification for Solar Simulators for Electrical Performance Testing of Photovoltaic Devices
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ASTM E 1125 : 2016 : R2020 Standard Test Method for Calibration of Primary Non-Concentrator Terrestrial Photovoltaic Reference Cells Using a Tabular Spectrum
ASTM E 1362 : 2015 : R2019 Standard Test Methods for Calibration of Non-Concentrator Photovoltaic Non-Primary Reference Cells
ASTM E 971 : 2011(R2019) Standard Practice for Calculation of Photometric Transmittance and Reflectance of Materials to Solar Radiation
ASTM G 197 : 2014 : R2021 Standard Table for Reference Solar Spectral Distributions: Direct and Diffuse on 20° Tilted and Vertical Surfaces
ASTM G 90 : 2017 Standard Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight
ASTM G 201 : 2016 Standard Practice for Conducting Exposures in Outdoor Glass-Covered Exposure Apparatus with Air Circulation
ASTM E 1980 : 2011 : R2019 Standard Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque Surfaces
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ASTM E 973 : 2016 : R2020 Standard Test Method for Determination of the Spectral Mismatch Parameter Between a Photovoltaic Device and a Photovoltaic Reference Cell
ASTM G 222 : 2021 Standard Practice for Estimation of UV Irradiance Received by Field-Exposed Products as a Function of Location
ASTM E 1021 : 2015 : R2019 Standard Test Method for Spectral Responsivity Measurements of Photovoltaic Devices
ASTM E 1036 : 2015 : R2019 Standard Test Methods for Electrical Performance of Nonconcentrator Terrestrial Photovoltaic Modules and Arrays Using Reference Cells
ASTM E 2848 : 2013 : R2023 Standard Test Method for Reporting Photovoltaic Non-Concentrator System Performance
ASTM G 214 : 2023 Standard Test Method for Integration of Digital Spectral Data for Weathering and Durability Applications

ASTM E 772 : 2015 : R2021 Standard Terminology of Solar Energy Conversion
ASTM E 490 : 2022 Standard Solar Constant and Zero Air Mass Solar Spectral Irradiance Tables
ASTM E 772 : 2015 Standard Terminology of Solar Energy Conversion
ASTM E 490 : 2000 : REV A : R2019 Standard Solar Constant and Zero Air Mass Solar Spectral Irradiance Tables

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