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Solar irradiance variations and solar activity
Journal of Geophysical Research: Space Physics, 1982A mean value for the 1 AU total solar irradiance of 1368.2 W/m2 and a downward trend of 0.05% per year were derived from measurements by the Active Cavity Radiometer Irradiance Monitor (ACRIM) experiment on the Solar Maximum Mission during 1980. Distinct temporary solar irradiance decreases associated with solar activity maxima were observed with a ...
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Renewable Energy, 1993
Abstract The data on the intensity distribution of solar radiation is essential for the designer to size solar energy systems, required for specific applications. The solar irradiance monitor has been developed to measure and record solar irradiance data from morning to evening at intervals of 1 min without the presence of a technician or ...
A. Thomas, A. Ganesan, S.A. Mujeeb
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Abstract The data on the intensity distribution of solar radiation is essential for the designer to size solar energy systems, required for specific applications. The solar irradiance monitor has been developed to measure and record solar irradiance data from morning to evening at intervals of 1 min without the presence of a technician or ...
A. Thomas, A. Ganesan, S.A. Mujeeb
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The effect of solar irradiation on solar cells
2021Photovoltaic systems have been increasingly used in the generation of electrical energy, either as a means of providing electricity in areas where there is no grid connection (stand-alone systems), or by providing electricity to the grid (grid connected systems).
Ibrahim, K.A., Gyuk, P.M., Aliyu, S.
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Metrologia, 1991
Support is given for the suggestion that the mean annual value of the solar constant varies as an algebraic sum of changes in effective temperature and photospheric radius. A set of harmonic constituents covering the period 1979 to 1987 is suggested.
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Support is given for the suggestion that the mean annual value of the solar constant varies as an algebraic sum of changes in effective temperature and photospheric radius. A set of harmonic constituents covering the period 1979 to 1987 is suggested.
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Science, 1984
The absolute radiometer on Spacelab 1 was used to obtain solar irradiance observations from space. A number of effects must be taken into account in the data reduction. A provisional value was obtained for the mean solar constant during the observation period (6 to 8 December 1983).
D. Crommelynck, V. Domingo
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The absolute radiometer on Spacelab 1 was used to obtain solar irradiance observations from space. A number of effects must be taken into account in the data reduction. A provisional value was obtained for the mean solar constant during the observation period (6 to 8 December 1983).
D. Crommelynck, V. Domingo
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Cloud tracking for solar irradiance prediction
2017 IEEE International Conference on Image Processing (ICIP), 2017We propose a video analytic system to segment and track clouds for the purpose of solar irradiance prediction. Ground-based imaging sensors are used to monitor potential sun occlusions for solar irradiance drop prediction, which can be used to assist power ramp control strategies. Sky images are first rectified to remove fisheye artifacts. Cloud pixels
Ming-Ching Chang +4 more
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Contributions of the solar ultraviolet irradiance to the total solar irradiance during large flares
Journal of Geophysical Research: Space Physics, 2006The solar X‐ray radiation varies more than other wavelengths during flares; thus solar X‐ray irradiance measurements are relied upon for detecting flare events as well as used to study flare parameters. There is new information about the spectral and temporal variations of flares using solar irradiance measurements from NASA's Solar Radiation and ...
Thomas N. Woods +2 more
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Atmospheric Research, 1989
Since November 1978 a set of total solar irradiance (TSI) measurements from space is available, yielding a time series of more than 23 years. From measurements made by different space radiometers (HF on NIMBUS 7, ACRIM I on SMM, ACRIM II on UARS and VIRGO on SOHO) a composite record of TSI can be compiled. This leads to a reliable record of TSI with an
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Since November 1978 a set of total solar irradiance (TSI) measurements from space is available, yielding a time series of more than 23 years. From measurements made by different space radiometers (HF on NIMBUS 7, ACRIM I on SMM, ACRIM II on UARS and VIRGO on SOHO) a composite record of TSI can be compiled. This leads to a reliable record of TSI with an
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Data on total and spectral solar irradiance
Applied Optics, 1983This paper presents a brief survey of the data available on solar constant and extraterrestrial solar spectral irradiance. The spectral distribution of solar radiation at ground surface, computed from extraterrestrial solar spectral irradiance for several air mass values and for four levels of atmospheric pollution, is also presented.
A T, Mecherikunnel +2 more
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1999
The desire to detect possible variations of the total solar irradiance (TSI), the total amount of power supplied to the Earth from the Sun by radiative means, has been a goal for more than a century. Interest in this quantity arose from a realization that it is a determining factor of the Earth’s climate.
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The desire to detect possible variations of the total solar irradiance (TSI), the total amount of power supplied to the Earth from the Sun by radiative means, has been a goal for more than a century. Interest in this quantity arose from a realization that it is a determining factor of the Earth’s climate.
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