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SRML Glossary "I"
Special thanks to NREL
We'd like to thank the National Renewable Energy Laboratory for
making available to us their glossary, which is the basis of ours. We've
edited and reformatted it, and linked it to our Web pages, and we'll continue
to add our own specialized terms, illustrations, and examples. Please note that
the Solar Radiation Monitoring Laboratory takes full responsibility for any
inaccuracies that may occur.
Links to other glossary sections:
A B
C D E F
G H I J K
L M N O
P Q R S
T U V W
X Y Z
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The International Energy Agency, an autonomous agency
linked to the Organisation for Economic Co-operation and Development.
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The Institute of Electrical and
Electronics Engineers, Inc.
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Solar
radiation in the visible region of the solar
spectrum to which the human eye responds.
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The angle
that a ray (of solar energy, for example) makes with a line perpendicular
to the surface. For example, a surface that directly faces the sun has a
solar angle of incidence of zero, but if the surface is parallel to the
sun (for example, sunrise striking a horizontal rooftop), the angle of incidence
is 90°. The figure accompanying the description of airmass
illustrates a solar angle of incidence of 48.2° to a horizontal surface.
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Incoming
radiation; i. e., radiation that strikes
a surface.
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Radiation with wavelengths greater than those of the visible light
(at about 8000 Angstroms or 800 nanometers(nm)) but shorter than those of microwaves
(at about 1,000,000 Angstroms or 800,000 nm). Infrared radiation is associated with
heat energy.
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Solar radiation
on the surface of the Earth. This term has been generally replaced by solar
irradiance because of the confusion of the word with insulation.
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Typically, a temperature inversion, or a zone in the atmosphere in which the
temperature increases with altitude, instead of the expected decrease. In general, an
inversion is any reversal of the normal trend of the property of an atmospheric
substance with respect to altitude.
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An instrument for determining the spectral distribution of irradiance. A
light interferometer divides a beam of light into two or more beams and
brings the beams back together. The recombined beams shine on a screen or
another object like a detector surface. The resulting interference fringes
can be used to determine the spectral nature of light.
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The rate
at which radiant energy arrives at a specific area of surface during a specific
time interval. This is known as radiant flux density.
A typical unit is W/m2.
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Links to other glossary sections:
A B
C D E F
G H I J K
L M N O
P Q R S
T U V W
X Y Z
© 2000, UO Solar Radiation Monitoring
Laboratory.
Last
revised: December 11, 2000.
Home page URL: solardat.uoregon.edu |