[daip] [!4954]: aips - CALIB amplitude errors in phase-only solution

[Eric Greisen]

Eric Greisen updated #4954
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              Status: Closed (was: Response Overdue)

CALIB amplitude errors in phase-only solution
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           Ticket ID: 4954
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/4954
           Full Name: Adam T Deller
               Email: deller at astron.nl
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Closed
            Priority: Default
      Template Group: Default
             Created: 26 May 2014 12:41 PM
             Updated: 27 June 2014 03:52 PM



I have solved it!  The gains were calculated by a special
routine whenever there was only 1 or 2 baselines in a
time sample.  This happens a lot seemingly in your
data.  The antenna 8 issues were samples that had
5-9 and 8-9 but no 5-8.  That special subroutine did 
not honor the scaling properly.  It is messy so I added
code at the end to force amp = 1 when phase only was
requested.

It should be fixed in tomorrow's MNJ and I guess it should
go in both 31DEC13 and 31DEC14.

Thanks for providing such good documentation for this
issue.

Eric Greisen




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