[daip] [!9380]: AIPS - Finding bad channel numbers

[Eric Greisen]

Eric Greisen updated #9380
--------------------------

       Staff (Owner): Eric Greisen (was: -- Unassigned --)
                 Due: - Cleared - (was: 08 December 2016 09:57 PM)

Finding bad channel numbers
---------------------------

           Ticket ID: 9380
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/9380
           Full Name: Robert Gray
               Email: roberthansengray at gmail.com
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 06 December 2016 09:57 PM
             Updated: 07 December 2016 03:28 PM
      Resolution Due: 14 December 2016 09:57 PM (7d 6h 29m)



There are a great many editing programs but they all require the TV
at some level.  RFLAG is the primary one that people with EVLA data
use and it only needs to make plot files - so the TV is a bit optional.
It does not identify bad channels for you to then flag with UVFLG.
Instead it generate often 1000000's of flags in a flag table which you
then apply.  It has adverbs that let you flag all of a channel, antenna,
time, baseline if more than x fraction is marked bad by RFLAG.  Those
adverbs might help accomplish what you want.  Note that the
chapter of the CookBook you most want is Appndix E.

The more serious question is what is wrong with your TV display?
What are its symptoms?  Note that TVFLAG is not an appropriate
task for 8192 channels.  It does continuum well.  SPFLG or FTFLG
would be better.  With so many channels these tasks will take quite
a while to make the master grid but then shold run well on the TV.

ERic Greisen




------------------------------------------------------
Staff CP:  https://help.nrao.edu/staff