Feature request: make AIRS converter output easier to use

[nancycollins]

Use case

running the AIRS converter outputs a summary of obs for each input file. there are 240 input files/day. a more useful output is to print a summary of the final obs_seq file just before exiting.

Is your feature request related to a problem?

if there is too much output it obscures actual useful messages

Describe your preferred solution

the airs_fix branch has 2 updated observations/obs_converter/AIRS files where the summary output is moved from the per-file routine to the main routine.

[hkershaw-brown]

currently has full rttov12 namelist options in default work/input.nml

So the code will error with invalid namelist items if you compile with rttov13

https://github.com/NCAR/DART/blob/99ebec56a6efdd243ed026da24b29a1a45bb8cdd/observations/obs_converters/AIRS/work/input.nml#L128-L201

same for GEOS https://github.com/NCAR/DART/blob/99ebec56a6efdd243ed026da24b29a1a45bb8cdd/observations/obs_converters/GOES/work/input.nml#L84-L156