[daip] [!15875]: AIPS - Bandpass calibration

[Eric Greisen]

Eric Greisen updated #15875
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       Staff (Owner): Eric Greisen (was: -- Unassigned --)

Bandpass calibration
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           Ticket ID: 15875
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/15875
                Name: Marcello Giroletti
       Email address: giroletti at ira.inaf.it
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 19 March 2020 04:34 AM
             Updated: 19 March 2020 11:58 AM
           Reply due: 23 March 2020 11:43 AM (3d 23h 44m)
      Resolution due: 13 December 2022 05:00 PM (999d 5h 1m)

Yes the CookBook is in error.  I am not aware of 2 rounds of BPASS being useful.  Usually one removes the delay first and then does a BPASS.  Full complex is better if you have good S/N but in a recent Q band data set I had to use BPASSP(1)=1 since the S/N was bad at the high frequency (on Cygnus A no less).  I tend to use Appendix C of the CookBook rather than the lengthy Chapter 9 which might have issues like the one you found.  Delay fitting does not use the amplitude so an amplitude only BP table would have no effect.
Eric Greisen


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