[daip] Re: SMOOTH in IMAGR

[Eric Greisen]

Amitesh Omar writes:

 > 	I am bit confused about the option SMOOTH in IMAGR. Since IMAGR
 > goes back to uv domain to subtract clean components, if one does let us
 > say Hanning smoothing inside IMAGR, after cleaning (one cycle) the map to
 > which uvdata the (FT of) clean components are subtracted - hanning
 > smoothed or single channel uv-data to produce residual map ?
 > 

SMOOTH is applied to the data as they are first read from the input
data file and copied to the .IMAGR. work file.  In that sense, it is
one of the calibration adverbs like DOCAL, DOBAND, etc.  The images
and Clean cycles are then made with the .IMAGR. file and the original
data file is thereafter ignored.  Thus the CCs are applied to the data
that produced them, not to some data at a prior stage.

Eric Greisen