UV_MAP

        UV_MAP :  Fast map making from UV data, using FFT

    UV_MAP makes a map from UV data by gridding  the   UV   data   using   a
    convolving  function,  and then Fast Fourier Transforming the individual
    channels.  UV_MAP can produce one beam per channel or a common beam  for
    all  channels.  In the latter case, the gridding is done only once, thus
    neglecting  frequency change between channels; this is  of  course  much
    faster.

    UV_MAP allows to shift the map center and rotate the image, by  shifting
    the  phase  tracking center and rotating the UV coordinates of the input
    UV table.

    UV_MAP produces an output LMV cube (X, Y, Velocity) and a BEAM image  or
    cube  from  the input  UV  table.  UV_MAP is an optimized version of the
    older UVMAP.