Air mass

Air mass

Equal to the cosine of the zenith angle-that angle from directly overhead to a line intersecting the sun. The air mass is an indication of the length of the path solar radiation travels through the atmosphere. An air mass of 1.0 means the sun is directly overhead and the radiation travels through one atmosphere (thickness).

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Part of Speech: noun
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Industry/Domain: Energy
Category: Solar power
Company: U.S. DOE
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air mass

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Large body of air with shared temperature and humidity characteristics associated with its area of origin e.g. Maritime or continental; tropical or polar.

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A large, more or less uniform body of air with nearly the same temperature and moisture conditions throughout.

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