Use simple quadratic interpolation
to model line wings on fine grid.
Disabled
Use inverse quadratic (ie matching Lorentzian-like lineshape)
interpolation to model line wings on fine grid
Restrictions
None.
Notes
The main use of this flag is to investigate whether the
form of polynomial used to interpolate wide-mesh calculations to
the fine grid significantly affects the results. The order of polynomial
is hard-wired by the dimension 3 in arrays
ABSWID, CNTWID (set in spcini_sub.f90) and not
something that is easily altered, so inverting it is about the only option.
A second use is that the RFM may flip from inverse quadratic to quadratic
for a small change in input parameters (the inverse quadratic being impossible
to apply in certain situations, e.g., zero values), giving significantly
different spectra.
The clue is that the difference between two spectra has a sinusoidal shape
in a 1 cm-1 interval
with a zero-crossing at 0.5 cm-1. This flag
forces quadratic throughout which, although not as accurate, at least enforces
consistency.
