[daip] [!4042]: aips - PBCOR

[NRAO Helpdesk]

Amy Mioduszewski updated #4042
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       Staff (Owner): Amy Mioduszewski (was: -- Unassigned --)

PBCOR
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           Ticket ID: 4042
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/4042
           Full Name: Lynn D Matthews
               Email: lmatthew at haystack.mit.edu
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): Amy Mioduszewski
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: ALMA E2E
      Template Group: Default
             Created: 07 November 2013 04:08 PM
             Updated: 07 November 2013 04:08 PM
                 Due: 11 November 2013 05:12 PM (4d 0h 0m)
      Resolution Due: 18 November 2013 04:08 PM (10d 22h 55m)


I have noticed a problem with PBCOR that seems to occur only with EVLA data: the center of the primary beam in the corrected image is not at the phase center. A screen shot showing an example is attached.

There appears to be no problem with old VLA data. Further, things are okay for a case where I had combined VLA+EVLA data in DBCON. However, if I take the same data and instead combine them in the reverse order (i.e., as EVLA+VLA), the problem again occurs.

Lynn Matthews

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