RFM Driver Table Sections

*XSC Section: Cross-Section Data


Secondary Section - depends on whether any 'cross-section' molecules selected.

Specify molecular cross-section files.

Multiple fields, arbitrary order
FILXSC C200 Name of .xsc File
DEFXSC C200 Default .xsc Filename template (contains '*' character)

  1. 'Cross-section' molecules are any molecule which is not represented in the HITRAN 'line' database.
  2. The RFM assigns indices ≥100 to the most common of these, but any arbitrary molecule can be used.
  3. The *XSC section accepts files in the original HITRAN .xsc format, as well the RFM .xsc format (which is the HITRAN format with extra header records inserted). However you will first need to concatenate the original HITRAN files into a single file, eg if you've downloaded a set of files N2O5*xsc from the HITRAN web-site, then
    cat N2O5*.xsc > n2o5.xsc
  4. If a filename template DEFXSC is supplied, identified by containing a '*' character, first all the explicitly specified files are read, then '*' character in the template is expanded to the absorber name of any remaining molecules (using the 'fnn' form for CFCs).
  5. Cross-section data is provided as absorption coefficient spectra measured at a set of arbitrary (p,T) coordinates. For particular path (p,T) conditions, the RFM interpolates using triangulation or, for points outside the triangulation domain, interpolation to the value at the closest boundary point.

       f11.xsc   ! Cross section data for F11
       f12.xsc   ! Cross section data for F12
       ./rfm_files/*.xsc   ! Other data, eg './rfm_files/f22.xsc'

Bug#16 (Fixed v5.03)