[daip] [!9732]: AIPS - R-L delay calibration: rldly & crsfring

[Yuri Kovalev]

R-L delay calibration: rldly & crsfring
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           Ticket ID: 9732
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/9732
           Full Name: Yuri Kovalev
               Email: yyk at asc.rssi.ru
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 29 January 2017 03:17 PM
             Updated: 30 January 2017 09:19 PM
                 Due: 01 February 2017 09:19 PM (2d 0h 0m)
      Resolution Due: 07 February 2017 09:19 PM (8d 0h 0m)



Dear Eric,

Interestingly, I had issues with rldly with high enough SNR as well some months ago.
Changing the S/N cutoff parameter was not helping.
Will send you more data when a high SNR source will present a clearer case.

Yuri

On Mon, 30 Jan 2017, NRAO Helpdesk wrote:

> Given that RLDLY works fine much of the time I do not know what to do with it
> for you.  If you can make a data set before RLDLY but after the rest of the
> calibration available - preferably not too large - I could experiment.  It looks
> to me as if you simply lack S/N to get good solutions in the lower IFs and that you
> get good solutions in IFs 5-8.  Have you considered having RLDLY combine IFs
> into a smaller number of solutions?  Since you give me plots only after RLDLY I
> cannot judge whether that would be the thing to do.  For the VLA we often
> combine IFs - either all or in halves - for better S/N.  The fact that you allow S/N
> as low as 2 is a clue that you are mucking about in low S/N.
>
> Eric Greisen
>
>
>
>
>
> Ticket Details
> ---------------------------------
> Ticket ID: 9732
> Department: AIPS Data Reduction
>
> Support Center: https://help.nrao.edu/index.php?/Tickets/Ticket/View/9732
>


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