1 PRIMARY
        PRIMARY

    Apply primary beam correction to an interferometer map.

2 Y_NAME$
        TASK\FILE "Uncorrected Image Name" Y_NAME$

    The input file name
2 X_NAME$
        TASK\FILE "Corrected Image Name" X_NAME$

    The output file name
2 BEAM$
        TASK\REAL "FWHM of primary beam (radians)" BEAM$

    The half-power beam width of the interferometer dishes (in radians)
2 RADIUS$
        TASK\REAL "Radius to truncate data (radians)" RADIUS$

    The outer radius of the corrected images. Data outside this radius  will
    be blanked.
1 END