[daip] [!5297]: aips - list fringes snr

[Gisela Ortiz]

Gisela Ortiz updated #5297
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              Status: Open (was: Closed)

list fringes snr
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           Ticket ID: 5297
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/5297
           Full Name: Gisela Ortiz
               Email: g.ortiz at crya.unam.mx
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Open
            Priority: Default
      Template Group: Default
             Created: 01 August 2014 06:24 PM
             Updated: 27 October 2014 05:30 PM



Hello,

When I list one single scan using OPTYPE='MATX' and DPARM(1)=3 (amp+rms), I get two matrices. The first one reads on the top: Amplitudes, 1000 =   1.000 Jy; and the second one, Rms, 1000 =   1.000 Jy. Does it mean that the SNR is the ratio of the entries of the first matrix to the entries of the second one?

It doesn't  make sense, because for example for baseline 5-4, the amplitude is 963, while the rms is 3588, giving a ratio of 0.26. However, I clearly see a peak in fringe rate, so I expect to obtain a larger value for SNR.

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