Documentation on pbplot

Task: pbplot
Purpose: Plot primary beam shapes.
Categories: utility

        PBPLOT plots the primary beam function.

Key: pbtype
        This is used to determine the type of the primary beam. Several
        values can be given. Normally this will simply be a telescope
        name.

Key: freq
        The frequency, in GHz, at which to determine the primary beam. The
        default is 1.4 GHz.

Key: options
        Extra processing options. There is only one possibility at the moment.
          derivative  Plot the derivative with frequency of the primary
                      beam (rather than the normal primary beam).

Key: device
        PGPLOT device. Default is no plot.