[daip] [!11045]: AIPS - BB379 - amplitudes very low on EB

[Amy Mioduszewski]

Amy Mioduszewski updated #11045
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              Status: Open (was: Response Overdue)
           Reply due: 27 September 2017 11:14 AM (was: 29 September 2017 11:20 AM)

BB379 - amplitudes very low on EB
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           Ticket ID: 11045
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/11045
                Name: Michael Bietenholz
       Email address: mbieten at yorku.ca
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Amy Mioduszewski
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 25 September 2017 11:14 AM
             Updated: 27 September 2017 11:30 AM
           Reply due: 27 September 2017 11:14 AM 
      Resolution due: 22 June 2020 05:00 PM (999d 5h 30m)

Hi Michael,I've looked at the sniffer plots for EB and the data looks much worse than the VLBA antennas, much noisier phases and lower in amplitudes (there is some effect of longer baselines on this).    So my guess is there was something wrong with EB during the observation, maybe pointing was off?  Anyway I don't think there is anything to be done, you could increase the amplitudes with SNCOR (OPCODE='MULA'), but that won't help with the seemingly lower than expected sensitivity.
Amy Mioduszewski
VLA Scheduling Manager
NRAO

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