[daip] [!16009]: AIPS - FRING FRNSRC: MIN FFT IN FREQ REQUESTED 1003040 MAX ALLOWED 262144

[Eric Greisen]

Eric Greisen updated #16009
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FRING FRNSRC: MIN FFT IN FREQ REQUESTED 1003040 MAX ALLOWED 262144
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           Ticket ID: 16009
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/16009
                Name: Eskil Varenius
       Email address: varenius at chalmers.se
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 03 April 2020 05:52 AM
             Updated: 03 April 2020 09:05 AM
      Resolution due: 28 December 2022 05:00 PM (999d 7h 54m)

I have read over your frequency structure and it is a "mess".  A number  of your IFs overlap.  14 and 15 almost completely!  Is this really correct?  There is a task called NOIFS which will make a single simple spectrum from your data.  FRING does not work properly when the increment between channels changes sign even if it happens only a few times.  That is why there is a test of this and a warning message.  It might work okay but it certainly is not guaranteed.  FRING would work on the output of NOIFS okay - but use only the X band data.

Eric Greisen


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