[daip] [!16434]: AIPS - Why the solution changes after add more flags

[Aiyuan Yang]

Aiyuan Yang updated #16434
--------------------------

Why the solution changes after add more flags
---------------------------------------------

           Ticket ID: 16434
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/16434
                Name: Aiyuan Yang
       Email address: ayyang at mpifr-bonn.mpg.de
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 26 June 2020 11:02 AM
             Updated: 26 June 2020 11:02 AM
           Reply due: 30 June 2020 11:07 AM (4d 0h 5m)
      Resolution due: 23 March 2023 12:00 AM (999d 12h 58m)

Dear VLA staff, 
I am new the AIPS to do the calibration and found that there are large delay on antenna18, spectral window 9-16 and polarization R, as shown below: 

But the amplitude solution on the corresponding antenna28, spw9-16, and R seems correct, as shown in the following, 



In this situation, do I need to flag the data of antenna28, spw9-16, and stokes RR?  

Actually, I have flagged them  and re-calibrated, but there seems to have a new outlier on L polarization for amplitude solutions, as shown below:


This new outlier is also present in the antenna1 to antenna20, as shown below: 



I am wondering where this outlier comes from after the flag. 
So do you have any idea about this, and do you have any suggestions about the situation?
Thank you very much in advance. 

Cheers,
Aiyuan Yang

 


------------------------------------------------------
Staff CP:  https://help.nrao.edu/staff
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listmgr.nrao.edu/pipermail/daip/attachments/20200626/53e5f04a/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 9ab8cade.png
Type: image/png
Size: 197818 bytes
Desc: not available
URL: <http://listmgr.nrao.edu/pipermail/daip/attachments/20200626/53e5f04a/attachment-0004.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ff4c41b8.png
Type: image/png
Size: 211747 bytes
Desc: not available
URL: <http://listmgr.nrao.edu/pipermail/daip/attachments/20200626/53e5f04a/attachment-0005.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 7b5aece2.png
Type: image/png
Size: 205566 bytes
Desc: not available
URL: <http://listmgr.nrao.edu/pipermail/daip/attachments/20200626/53e5f04a/attachment-0006.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0d895271.png
Type: image/png
Size: 204109 bytes
Desc: not available
URL: <http://listmgr.nrao.edu/pipermail/daip/attachments/20200626/53e5f04a/attachment-0007.png>