Table 4.

Parameters used in Equation (15).

Parameter	Meaning
Sn	The density of the absorber
${{\sigma }^{\prime }}_n\left(\lambda \right)$	Rapid part of the absorption cross section of the absorber
N	Number of absorbers
${\sigma }_{Ray}\left(\lambda \right)$	Reference spectra of Rayleigh scattering
${\sigma }_{Mie}\left(\lambda \right)$	Reference spectra of Mie scattering
${\sigma }_f\left(\lambda \right)$	Reference spectra of fluorescence
${\displaystyle {\displaystyle \sum }_{m=1}^M}{a}_m{\lambda }^m$	Low-order polynomial, in which $a_m$ is the coefficient of the polynomial, and ${\lambda }^m$ is the wavelength.
Sf	Fluorescence fit factor