CRTM coefficient loading interface updates

[chengdang]

With v3.2 adopting NetCDF as the default LUT format and CRTM coefficient LUTs following a consistent naming convention, we could reduce the number of optional arguments required by CRTM for many LUTs, especially for clouds and aerosols.

Example of CRTM LUT naming conventions: $scheme[$instrument].$CoefType.nc/nc4

AerosolCoeff.CMAQ.nc4         AerosolCoeff.NAAPS.nc4
AerosolCoeff.GOCART-GEOS5.nc4 AerosolCoeff.nc4

Note a few cloud LUTs need to be renamed to follow the CRTM style:

CloudCoeff_DDA_Moradi_2022.nc4    CloudCoeff_TAMU-07Sep2015.nc4     CloudCoeff.Thompson08.-109z-1.nc4
CloudCoeff_MW_2.4.0_a.nc4         CloudCoeff_TAMU-11Sep2014.nc4     CloudCoeff.WSM6.-109z-1.nc4
CloudCoeff_MW_2.4.0_exp_freq.nc4  CloudCoeff.GFDLFV3.-109z-1.nc4    CloudCoeff.WSM6.MieSphere.nc4
CloudCoeff_MW_2.4.0_exp.nc4       CloudCoeff.nc4

NPOESS.IRsnow.EmisCoeff.nc4 Nalli.IRsnow.EmisCoeff.nc4  Nalli2.IRsnow.EmisCoeff.nc4

Nalli.IRwater.EmisCoeff.nc4   Nalli2.IRwater.EmisCoeff.nc4  WuSmith.IRwater.EmisCoeff.nc4

IGBP.IRland.EmisCoeff.nc4   NPOESS.IRland.EmisCoeff.nc4 USGS.IRland.EmisCoeff.nc4

amsua_aqua.SpcCoeff.nc    atms_n21.SpcCoeff.nc      mwi_wsf-m1.SpcCoeff.nc    viirs-i_j2.SpcCoeff.nc
amsua_metop-c.SpcCoeff.nc cpr_cloudsat.SpcCoeff.nc  v.abi_g18.SpcCoeff.nc     viirs-i_n21.SpcCoeff.nc

amsua_aqua.TauCoeff.nc    cpr_cloudsat.TauCoeff.nc  v.viirs-i_j2.TauCoeff.nc  viirs-i_n21.TauCoeff.nc
atms_j2-srf.TauCoeff.nc   cris-fsr_j2.TauCoeff.nc   v.viirs-i_n21.TauCoeff.nc viirs-m_j2.TauCoeff.nc

Example of optional arguments could be removed:

 186   err_stat = CRTM_Init( SENSOR_ID, &
 187                         chinfo, &
 188                         Aerosol_Model, &
 189                         AerosolCoeff_Format, &
 190                         AerosolCoeff_File, &
 191                         Cloud_Model, &
 192                         CloudCoeff_Format, &
 193                         CloudCoeff_File, &
 194                         File_Path=COEFFICIENT_PATH, &
 195                         NC_File_Path=NC_COEFFICIENT_PATH, &
 196                         Quiet=.TRUE.)

Take aerosol as an example, here are the options:

• Keep only AerosolCoeff_File and infer Aerosol_Model and AerosolCoeff_Format from the file name.
• Keep only Aerosol_Model and use a global argument to define the format of all coefficient files.

These arguments were introduced during the transition period when CRTM supported only NetCDF aerosol and cloud coefficient files.