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CIRCLE 

        CIRCLE

    This  program  computes annular averages on an input cube to  produce an
    output  map.   Each line of the output map is the radial profile for one
    particular plane of the input cube.  The task can be used to  derive the
    radial profiles, for example in  circumstellar  envelopes.   The  radial
    pixel separation is always the X and  Y  increment.   If  the  X  and  Y
    increments  are  different,  the  averages  are  therefore  computed  on
    elliptical rings, despite the name of the task.