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        This  task  create an image which can be read from a file or created
    from a function.  The ouput filename is FILEO$.

    A- From a FILE:  if the logical variable IFILE$ is set to YES  an  image
    is  read from the input formatted file FILEI$ the column must ordered as
    :  x y z and expect to have standard gdf image  structure.   For  conve-
    nience, z should be in Brightness temperature, as for B case.

    B-  From a FUNCTION: If one of the function is activated a corresponding
    image using the parameters PARAMETERS$ will be created.   Intensity  are
    in Brightness temperature.

    E_DISK  : Elliptical Disk
    E_RING  : Elliptical Ring
    E_GAUS  : Elliptical Gaussian
    E_EXPO  : Elliptical Exponential
    RECT    : Rectangle
    POWER   : Power law
    PLAN    : Plan

    Convertion to Jansky is possible if variable JANSKY$ is set to YES.  The
    image can be mutiplied by a gaussian beam if BEAM$ is set to YES parame-
    ters are similar as for function GAUSS.

    ONLY  ONE  function  can be computed at the same time, Nevertheless more
    complex images can be produced using both CIMAGE and COMBINE tasks.

Gildas manager 2020-12-02