[daip] [!14061]: AIPS - PCAL with SPECTRAL=1

[Eric Greisen]

Eric Greisen updated #14061
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       Staff (Owner): Eric Greisen (was: -- Unassigned --)

PCAL with SPECTRAL=1
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           Ticket ID: 14061
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/14061
                Name: Lynn Matthews
       Email address: lmatthew at haystack.mit.edu
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 17 June 2019 11:16 AM
             Updated: 17 June 2019 03:49 PM
           Reply due: 19 June 2019 11:16 AM (1d 19h 26m)
      Resolution due: 12 March 2022 05:00 PM (999d 1h 10m)

I agree that the jumps look rather odd.  I think the task extends the answer at the edge channel of ICHANSELall the way to the edge.  It might be instructive to set ICHANSEL to include all channels as a test.I also doubt that the high frequency ripples are real - the coherence is probably added by SMOOTH and INTPARM.Do be aware that SMOOTH and any bandpass corr interact.  The question is what SMOOTH was done in BPASS.You then have to stay with that value if any, or have SMOOTH applied after the bandpass (different SMOOTH(1)).INTPARM was to do even more smoothing after that mess, but is certainly similar to SMOOTH if applied after thebandpass.  I wonder if you should not simply use the "continuum" solution for a narrow band observation.CheersEric


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