[daip] [!7191]: AIPS - CALIB variable gains for 3C286

[Eric Greisen]

Eric Greisen updated #7191
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       Staff (Owner): Eric Greisen (was: -- Unassigned --)
                 Due: - Cleared - (was: 09 September 2015 01:38 AM)

CALIB variable gains for 3C286
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           Ticket ID: 7191
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/7191
           Full Name: Wen-fai Fong
               Email: wfong at cfa.harvard.edu
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Response Overdue
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 01 September 2015 11:20 PM
             Updated: 07 September 2015 03:23 PM
      Resolution Due: 15 September 2015 01:38 AM (7d 10h 15m)



Try looking at the data for your calibration source.
For example, try POSSM on a scan-by-scan basis.
Are the phases coherent or do they scatter over
-180 to 180?  Sometimes calibration sources that should
be just adequate in flux get weaker with time and are no
longer useable.  Other times, RFI or other sorts of bad data
make individual scans unusable until they are extensively
edited.

Try reading Appendix E of the CookBook.  It contains lots
of EVLA useful information.

Eric Greisen




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