Location of fluorescence file for wavelength dependent fluorescence emission
from the bottom surface.
fluorescence_file file
The file must have two columns.
Column 1 is the wavelength in nm, and column 2 the corresponding
fluorescence. An arbitrary wavelength grid may be chosen as the
fluorescence will be interpolated linearely to the wavelength grid used for the
radiation calculation. Comments start with #. Empty lines are ignored.
Currently only works with the cdisort solver. Furthermore. if raman is
not set, wavelength_grid_file
must be specified with the same resolution as the source solar file, and the first value
must be the value specified by wavelength. The units of the fluorescence should
obviously be the same as for the source solar file.