Be exposure age calculator MATLAB function reference Version 2

This table duplicates Table 1 in Stone (2000).
This function actually calculates S sp and S mu for index latitudes that bound the actual latitude of the site, and then determines
the value at the site by linear interpolation. The exact method of interpolation used is relatively unimportant,
but we have chosen linear interpolation to avoid the problem of under- and over-shooting between index latitudes due
to the polynomial form of the Lal equations. Basically, linear interpolation guarantees that the scaling factor at the site
is not outside the range of the scaling factors at the bounding index latitudes.
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