Difference between revisions of "N Unit"
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N Unit
</dt>
A unit of index
of refraction in the atmosphere; a mathematical simplification designed to
replace rather awkward numbers involved in the values of the index of
refraction n for the atmosphere. It is defined by the relation N = (n - 1)
10E6
</dd>
Thus, if n = 1.000326, then N = 326. Correspondingly, M-units are used
for modified index of refraction, and B-units for potential index of
refraction. [[/a>|/a>
]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
