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Instrument: SUN PHOTOMETERS
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Description
A Sun photometer (also spelled Sunphotometer) is an instrument
that measures the intensity of sunlight arriving directly from
the Sun. Since it is designed to be pointed directly at the Sun,
a Sun photometer measures only direct sunlight, not the diffuse
light scattered from the sky, haze and clouds. Since haze blocks
some direct sunlight, a Sun photometer is an ideal instrument
for measuring haze.

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