GRID_EXTEND

        GRID_EXTEND

    This task makes a cube from  a  table   containing  irregularly  sampled
    data.   The data is interpolated/extrapolated using a convolution taking
    into account the beam size of the observing telescope.

    In mode NATURAL,  a  convolution  kernel  is  used  to  interpolate  the
    irregularly sampled data using the weight of each individual point.

    In mode UNIFORM, the same convolution process is used but the individual
    points are assumed to have equal weight.

    The pixel size is specified by the user, but the map size is  determined
    by  the task.  The input  table can be created by command GRID in CLASS,
    or using task TABLE from a formatted file.