[daip] [!10702]: AIPS - Phase wraps 3C84

[Jared Rice]

Phase wraps 3C84
----------------

           Ticket ID: 10702
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/10702
           Full Name: Jared Rice
               Email: jrice at physics.unlv.edu
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Amy Mioduszewski
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 19 July 2017 10:09 PM
             Updated: 20 July 2017 06:03 PM
                 Due: 24 July 2017 06:03 PM (4d 0h 0m)
      Resolution Due: 28 July 2017 06:03 PM (8d 0h 0m)



Dear Amy,

The IFs are contiguous so there is no issue there. We removed the CL and 
SN tables created by VLBAPCOR and then we ran VLBAMPCL. There were 16 
good solutions, 144 failures for 3C84. Maybe there is still an issue 
with 31DEC15 version? Would it be possible to run the 6cm data through 
the pipeline over there?

Regards,
    Jared

On 7/20/17 8:00 AM, NRAO Helpdesk wrote:
> Dear Jared,
>
> Those phases do look terrible.  Phase wraps after VLBAPCOR aren't necessarily "bad" but this correction should remove any phase jumps between the IFs.  Is the frequency continuous between the IFs?  There probably nothing wrong with the version of AIPS you are running, I suspect there is something wrong with the values in the PC table.  The simple solution is to run VLBAMPCL which does a manual phase cal (using FRING) and that should fix things nicely.    Remember to remove the CL and SN tables made by VLBAPCOR with EXTD.
>
>
>
> Amy Mioduszewski
> VLA Scheduling Manager
> NRAO
>
>
> Ticket Details
> ---------------------------------
> Ticket ID: 10702
> Department: AIPS Data Reduction
>
> Support Center:https://help.nrao.edu/index.php?/Tickets/Ticket/View/10702




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