+## Example input file with minimal input parameters,
comment             CH4 at 30K (3.3 micron band)
file_output         nk_CH4_30K_Fig5a.txt
file_spectrum       abs_CH4_30K_Fig5a.txt
file_substrate      au_nk.txt
thickness_cm        0.438E-04
visible_index       1.32
goal                1.00E-05
step_adapt          True
step                0.1
step_dnrate         0.02
step_interval       2
step_max            0.1
step_min            1.0E-3
step_uprate         0.01
approx_terms        -0.001
xrange1             3075
xrange2             2950
input_angle         8.5