[daip] [!4879]: aips - CALIB & DOFIT - strange behaviour of REFANT is included in DOFIT

[Eric Greisen]

Eric Greisen updated #4879
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       Staff (Owner): Eric Greisen (was: -- Unassigned --)
              Status: Closed (was: Open)
                 Due: - Cleared - (was: 08 May 2014 01:28 PM)

CALIB & DOFIT - strange behaviour of REFANT is included in DOFIT
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           Ticket ID: 4879
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/4879
           Full Name: Michael Bietenholz
               Email: mbieten at yorku.ca
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Closed
            Priority: Default
      Template Group: Default
             Created: 06 May 2014 01:28 PM
             Updated: 07 May 2014 02:43 PM



I was not familiar with the DOFIT option so I read the CALIB help
file and it said to read the DOFIT help file which I also did.  These 2 
help files promise that you will get bad results if you put REFANT
in the DOFIT list.  What is there about that promise that was not
met?

The whole concept has to do with extending good solutions on
reliable antennas to try to calibrate less reliable ones using all
data to the latter.  Clearly, the REFANT cannot change after the
first set and therefore REFANT is in the list of good antennas
not the list of poor antennas.

I will take a look at the programs that use this option and change
them to die when REFANT is not specified or is included in the
DOFIT list.  I choose "die" over clean up since such usage indicates
a serious lack of understanding of DOFIT.

Eric Greisen




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