[daip] wide field clean

[Eric Greisen]

larry at astro.umn.edu writes:
 > eric - hopefully i'll try the new imagr this week.  but in the
 > meantime, i've been using older imagr to clean a 249 field (overkill)
 > C configuration 74MHz data set, and noticed that the fields it
 > picks for subtraction do not necessarily go in order of
 > highest residual.  lots of fields with pretty low mins and maxes
 > get picked for cleaning while larger ones are still waiting.
 > does this make sense?  do you want mroe info?

If this is the 01 version lots of things in this sort of area have
been addressed.  It was supposed to look in the Clean windows while
the FFT reports the overall min/max which may well not be in the Clean
windows - e.g. at the corners.

Eric