[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 06:47 PM
                 Due: 24 July 2017 06:47 PM (4d 0h 0m)
      Resolution Due: 28 July 2017 06:47 PM (8d 0h 0m)



Dear Amy,

We just deleted all the SN tables back to 0 and CL tables back to 1 and 
re-ran VLBAEOPS. The problem seems to stem from there. We received this 
weird message after running VLBAEOPS:

DEIMOS> CLCOR1: CL version input   1 output   2
DEIMOS> CLCOR1: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
DEIMOS> CLCOR1: !  OPTYPE=EOPS is used for proper CT tables only !
DEIMOS> CLCOR1: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
DEIMOS> CLCOR1: UT1-UTC(sec), POLX, POLY(milliasec) used by correlator
DEIMOS> CLCOR1:     1  -1.  0.418959    40.530   434.250
DEIMOS> CLCOR1:     2   0.  0.417560    41.690   435.380
DEIMOS> CLCOR1:     3   1.  0.416080    43.180   436.650
DEIMOS> CLCOR1:     4   2.  0.414518    45.200   437.940
DEIMOS> CLCOR1:     5   3.  0.412900    47.650   439.170
DEIMOS> CLCOR1: ZTXOP2: using translated file name =
DEIMOS> CLCOR1: ZTXOP2: /tmp/usno_finals.erp
DEIMOS> CLCOR1: UT1-UTC(sec), POLX, POLY(milliasec) picked up from the 
USNO file
DEIMOS> CLCOR1:     1********** ********************************
DEIMOS> CLCOR1:     2********** ********************************
DEIMOS> CLCOR1:     3********** ********************************
DEIMOS> CLCOR1:     4********** ********************************
DEIMOS> CLCOR1:     5********** ********************************

Seems the times did not show up and it just shows a load of asterisks. 
Can you reproduce this issue on your end or give your insight?

Regards,
    Jared

On 7/20/17 11:02 AM, Jared Rice wrote:
> 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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