POSTPROCESSING FACILITIES

``postpro_geo'' and ``postpro_vort'' are postprocessing routines to calculate the $L_{1}$, $L_{2}$ and $L_{\infty }$ normalized errors [16,31] of a scalar field produced by ICOSWP respect to a reference field. ``postpro_geo'' calculate the normalized errors for the height field and ``postpro_vort'' for the relative vorticity field.
The (derivative of the NCAR Spectral Transform Shallow Water Model) is used to produce a reference solution considered as a ``true solution''.
The program (sinterp) has been used to interpolate the spectral model high-resolution reference fields to the ICOSWP grids.
Note: In order to use the output from (sinterp) as an input file for (postpro_geo, postpro_vort), the output format in subroutine npr_bicubics (called by sinterp) must be changed to '(3g24.16)'.

postpro_geo and postpro_vort input files

The necessary input files are:

• POSTPRO_INI
  Which contains the names of the files with the ICOSWP field and the reference field.
  It must be in the ``input'' subdirectory.
  The namelist in POSTPRO_INI is:
  • &files file_ex=, file_num=/
    file_ex is the name of the file with the ICOSWP field
    file_num is the name of the file with the interpolated reference field

• DYNTEST_INI
  It is the same input ``DYNTEST_INI'' file that has been used to generate the model field for which the normalized errors will be calculated.
  It must be in the ``input'' subdirectory.
• The GRIDMAP.* or OPT_GRIDMAP.* file produced by ``generator'' and used also by ICOSWP to produce the ICOSWP field.
  It must be in the ``grids'' subdirectory.