Define pyranometer in long form
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Explanation:
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A pyranometer is a sensor that converts the global solar radiation it receives into an electrical signal that can be measured. Pyranometers measure a portion of the solar spectrum. As an example, the CMP21 Pyranometer measures wavelengths from 0.285 to 2.8 µm. A pyranometer does not respond to long-wave radiation
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Explanation:
Pyranometers measure global irradiance: the amount of solar energy per unit area per unit time incident on a surface of specific orientation emanating from a hemispherical field of view (2π sr), denoted Eg↓. The global irradiance includes direct sunlight and diffuse sunlight, as illustrated in Figure 1. The contribution from direct sunlight is given by E⋅cos(θ) where θ is the angle between the surface normal and the position of the sun in the sky and E is the maximum amount of direct sunlight. The global irradiance is then:
Eg↓ = E⋅cos(θ) + Ed
where Ed accounts for the diffuse sunlight.
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