The objective of these GrADS scripts is to plot
the some chacteristics of the vertical modes.

1 - The file dir.cfg contains directories used by
    the GrADS scripts. It is generate by 
    ${dirhome}/Config/Create_gs_dir_cfg
    after define yours own dirhome and dirdata at
    ${dirhome}/Config/Config_Dir
    Use ${dirhome}/Config/Make_Dir_png to make the
    outuput directories for the figures.

2 - The Grads script pltdel.gs is used to plot the
    pressure increment of the layers for the reference case.
    Usage, inside the GrADS aplicativo (grads) use
    pltdel -h
    to see the help explanation, and
    pltdel
    to generate the pressure increment figure.
    Must use grads -p (portrait).

3 - The GrADS script plteb.gs is used to plot the
    basic state of the cases: temperature and 
    static stability (two figures) for the reference case.
    Usage, inside the GrADS aplicativo (grads) use
    plteb -h
    to see the arguments and default, and
    plteb pl stlp
    to generate the basic state figures.
    Must use grads -p (portrait).

4 - The GrADS script pltf.gs is used to plot the
    vertical modes structures (VMS) for the reference case:
       km VMS for each Case (see below)
       Four vms by figure
       If kr=mod(km,4)/=0, then the remaining
          kr (3, 2 or 1) VMS are plotted at the
          last figure
    Usage, inside the GrADS application (grads) use
    pltf -h
    to see the arguments and default, and
    pltf pl slp
    to generate the VMS figures.
    Must use grads -p (portrait).