Results 271 to 280 of about 8,944 (306)

Measurement of Total and Spectral Solar Irradiance

Space Science Reviews, 2006
The Sun’s electromagnetic radiation powers our solar system. In the case of the Earth it heats the lands and ocean, maintains our atmosphere, generates clouds, and cycles water. For other planets and minor bodies, similar and appropriate physical processes occur, also powered by the Sun.
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Ultraviolet Solar Spectral Irradiance Variation on Solar Cycle Timescales

Proceedings of the International Astronomical Union, 2018
AbstractUltraviolet (UV) Solar spectral Irradiance (SSI) has been measured from orbit on a regular basis since the beginning of the space age. These observations span four Solar Cycles, and they are crucial for our understanding of the Sun-Earth connection and space weather.
Martin Snow, Francis G. Eparvier, Jerald Harder, Andrew R. Jones, William E. McClintock, Erik Richard, Thomas N. Woods   +6 more
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The solar spectral irradiance 1200–2550 Å at solar maximum

Journal of Geophysical Research: Space Physics, 1980
Full‐disk solar spectral irradiances at solar maximum were obtained in the spectral range 1200–2550 Å at a spectral resolution of approximately 1 Å from rocket observations above White Sands, New Mexico, on June 5, 1979. Comparison with measurements made near solar minimum indicates approximately a factor of 2.5 increase in the irradiance at 1200 Å, a ...
George H. Mount, Gary J. Rottman, J. Gethyn Timothy   +2 more
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Influence of Urban Aerosol on Spectral Solar Irradiance

Journal of Applied Meteorology, 1994
Abstract From a dataset of spectral distribution of global and disuse solar irradiances measured in Barcelona during the last three years, the influence of turbidity caused by urban aerosol on spectral composition of solar radiation and transmissivity of urban atmosphere has been determined for cloudless conditions.
J. Lorente, A. Redañ, X. De Cabo
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Data on total and spectral solar irradiance: reply to comments

Applied Optics, 1985
The letter is a response to Frohlich's (1983) comments on an earlier paper (Mecherikunnel et al., 1983) containing a brief survey of the available data on the solar constant and its spectral distribution. The sources of the initial data used in the above study are mentioned, and comments are made on the accuracy of the measurements.
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Spectral solar irradiance under Harmattan conditions

Renewable Energy, 1995
Results of spectral solar radiation measurements at Ile-Ife (7 degrees-30'N, 4 degrees 31'E; South Western Nigeria) for two non-consecutive months between December 1991 and February 1992 are presen ...
Z.D. Adeyefa, B. Holmgren, J.A. Adedokun
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Solar Spectral Irradiance and Summary Outputs Using Excel

Photochemistry and Photobiology, 2015
AbstractThe development of an Excel spreadsheet is described that calculates solar spectral irradiance between 290–3000 nm on an unshaded, horizontal surface under a cloudless sky at sea level, together with summary outputs such as global UV index, illuminance and percentage of energy in different wavebands.
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Solar irradiance: total and spectral and its possible variations

Applied Optics, 1976
The present status of our knowledge of the total and spectral irradiance of the sun is briefly reviewed. The currently accepted NASA/ASTM standard values of the solar constant and the extraterrestrial solar spectral irradiance are presented. The uncertainties in these values are relatively high.
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Analysis of the Variation in the Spectral Distribution of Solar Irradiance

1991
In this work we have studied during the period of one year the behaviour of the spectral solar irradiance with some factors such as AM value, position of the surface that receives the solar radiation (south oriented 40° tilted, horizontal and suntracking) and seasons.
F. Fabero, F. Chenlo
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Comparison of solar spectral irradiance measurements with pyrheliometer total solar irradiance data.

Accurate solar irradiance measurements are critical for optimising solar energy systems, understanding atmospheric processes, and advancing climate research. Pyrheliometers, which provide Direct Normal Irradiance (DNI) measurements over a broad spectral range, are widely used due to their simplicity, cost-effectiveness, and ease of deployment. However,
Dhrona Jaine, Julian Gröbner
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