Air-mass: Difference between revisions
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Latest revision as of 22:45, 1 February 2024
6-3-035
The length of path through the earth's atmosphere traversed by the direct solar beam, expressed as a multiple of the path traversed to a point at sea-level with the sun directly overhead.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
