The RFM has default filenames
for all output files, this section just provides the ability to override
If more than one
tangent height (or other ray path
definition) is specified,
FILPTH must contain a wildcard '*'
character and then acts as a template with '*'
expanded to accommodate the ray path [t]
(see Output Files)
If any run_ID is specified,
this is also appended to
the output filename.