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MODSOURCE

        [WEEDS\]MODSOURCE MODFILE ANTSIZE [/BACKGROUND TBG] [/VERBOSE]

    Model the emission of a source at the  local  thermodynamic  equilibrium
    (LTE). The model paramaters (column density, kinetic temperature, source
    size, line width and velocity offset for each  species)  are  read  from
    MODFILE. The modeled antenna temperature is stored in the TA_MODEL memo-
    ry. For convenience the current spectra is also stored in a memory, OBS,
    so one can easily overplot the result of the model on the observed spec-
    tra.

    Arguments:
      MODFILE     the name of the file containing the parameters.  The  file
                  should  one  line  per species with six columns containing
                  respectively:

                  1) The species name
                  2) The column density for this species in cm-2
                  3) The exitation temperature in K
                  4) The source size in arcsecs
                  5) The offset velocity from the source VLSR, in km/s
                  6) The line FWHM in km/s

                  Lines that start with a "#" are treated as comments.

      ANTSIZE     the antenna size in meters

    Options:
      /BACKGROUND set the background temperature to TBG, in  K.  Default  is
                  2.73.

      /VERBOSE    prints  partition function, lines frequencies, upper level
                  energies and degeneracies, Einstein coefficients and opac-
                  ity at the line center.


Gildas manager 2011-09-07