[daip] amplitude calibration

[Eric Greisen]

Yoshiaki Hagiwara writes:
 > this time, i changed reference telescope from #18 to #22 for all 
 > calibration, that resulted in great improvement.
 > I used the provided clean model for 3c286.
 > it turned that there are much less high points on SNPLT (plots are at 
 > the ftp site below). Still, should I delete a few high points?
 > 
 > then I executed GETJY.
 > 
 > dop18 > GETJY1: 0836+710        :  0   A     1    1.52480 +/-   0.00999
 > dop18 > GETJY1: 09550+65483     :  0   A     1    0.89934 +/-   0.00517
 > dop18 > GETJY1: Appears to have ended successfully
 > 
 > 
 > the obtained calibrator flux is much closer to the value (0.63 Jy) in 
 > the VLA list but still ~ 30% different....
 > 
 > I plotted the 3c286 visibility with DOCAL true (using CL3; incl 
 > amp+phase solns.), the source is definitely resolved.
 > Should I limit uvrange around at 1 Mega wave lengths in CALIB?
 > the visibility plots are at the ftp site below as well.
 > 

30% different is easily within the variablity of this sort of source.
It would appear that you have solved the problem.  A few hish SN table
points are okay - and I would flag the UV data causing them not the SN
points themselves.  TVFLG, EDITA, EDITR are the tasks of choice for
that.

Eric Greisen