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Direct radiationPortion of radiation emitted by a radiation source which reaches the observed receiving point via the shortest distance, possibly weakened by existing shielding walls. The direct radiation is distingu [..]
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Direct radiationSun’s rays that fall directly from the sun to the observation point on the ground. At the observation point these are joined by diffuse radiation.
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Direct radiationRadiation received directly from the sun.
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Direct radiationthe energy from the sun that hits the earth without being obstructed by clouds, molecules, or aerosols. It is the sunlight that creates a shadow at the surface.
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