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UV_STAT

        [CLEAN\]UV_STAT Keyword [Step Start]

    Perform analysis of the UV data set to  predict  the  synthesized  beam,
    expected  noise  level,  and recommended pixel size for UV_MAP.  Keyword
    can be TAPER, WEIGHT, or CELL.

    For TAPER, beam sizes and noise level (in flux and brightness)  will  be
    computed  for  9 different tapers (from Start to Start*Step^9).  Default
    value for Step is sqrt(2), Default value for Start is  50  m.  Weighting
    mode,  UV  cell  size  and  "robust"  parameter  are taken from variable
    UV_CELL.

    For WEIGHT, beam sizes and noise level (in flux and brightness) will  be
    computed  for  9  different "robust" weighting parameters (from Start to
    Start*Step^9). Default value for Step is sqrt(10), and default value for
    Start  is  derived to center the "robust" parameter values around 1.  UV
    cell size is taken from variable UV_CELL[1], and  Taper  is  taken  from
    variable UV_TAPER.

    For CELL, beam sizes and noise level are computed  for  9  different  UV
    cell sizes. That version is still under development.

    UV_STAT allows the astronomer to select the  best  weighting  parameters
    according  to  its  personnal  tradeoff  between  angular resolution and
    sensitivity.


Gildas manager
2001-04-24