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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