Table 5.

Parameters used in Equations (17) and (18).

Parameter	Meaning
$\overrightarrow{I_0}$	High-resolution solar transmission spectrum
$F_s^{rel}$	Relative fluorescence signal
< >	Convolution symbol (with the instrumental line shape)
${\displaystyle {\displaystyle \sum }_{i=0}^n}{a}_i{\lambda }^i$	Polynomial item (the continuum radiance), in which $a_i$ is the coefficient of the polynomial, ${\lambda }^i$ is the wavelength.
$\overrightarrow{y}$	Logarithm of the measurement vector
$S_{ϵ}$	Diagonal measurement error covariance matrix