access icon openaccess Spectral influence analysis on sunshine duration measurement

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 10/10/2018, Accepted 08/01/2019, Published 25/03/2019

Sunshine duration is an important variable in surface meteorological measurement. In this article, two methods for measuring sunshine duration are described, one is photovoltaic-based instrument, which ranges from 400 to 1100 nm, and the other is thermopile-based pyrheliometer, which ranges from 300 to 3000 nm. Due to the spectrum is more representative and accuracy for solar radiation, the pyrheliometer is recommended as the reference sensor for the detection of the threshold irradiance for defining the sunshine duration. The comparison between the photovoltaic- and thermopile-based instruments is carried out to uncover the spectral influence on sunshine duration measurement, analysis by the SMARTS tool is presented to calculate irradiance with different spectral ranges under different altitudes.

Inspec keywords: atmospheric measuring apparatus; sunlight; solar radiation; thermopiles

Other keywords: spectral influence analysis; different spectral ranges; size 400.0 nm to 1100.0 nm; surface meteorological measurement; sunshine duration measurement; pyrheliometer; size 300.0 nm to 3000.0 nm

Subjects: Thermal instruments and techniques; Instrumentation and techniques for geophysical, hydrospheric and lower atmosphere research; Instrumentation and techniques for aeronomy, space physics, and cosmic rays; Solar cells and arrays; Sunlight and atmospheric radiation

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