[daip] [!10033]: AIPS - AIPS warning messages (after Miriad calibration)

[Robert Gray]

Robert Gray updated #10033
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AIPS warning messages (after Miriad calibration)
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           Ticket ID: 10033
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/10033
           Full Name: Robert Gray
               Email: roberthansengray at gmail.com
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 15 March 2017 07:11 PM
             Updated: 15 March 2017 07:11 PM
                 Due: 17 March 2017 07:11 PM (2d 0h 0m)
      Resolution Due: 23 March 2017 07:11 PM (8d 0h 0m)



Hi!

I’m analyzing some data from the Allen Telescope Array, calibrated by SETI Institute using Miriad, written to FITS, which I import to AIPS and continue flagging, image, and so on.  It seems to work, which seems like a minor miracle!  

But, I don’t understand several AIPS messages and ask your advice on whether they require some action:

1.  “FITLD2: WARNING! STOKES VALUES NOT CONVERTED TO NORMAL FORMS”  The ATA polarizations are called XX and YY, and AIPS does later recognize them...

2. “UVPLT2: WARNING: uncalibrated linear polarization data may be a problem”  Is this a problem?  IMAGR issues the same warning, but works.  The data were calibrated in Miriad; I leave docalib defaulted to -1 (uncalibrated) because setting it to 1 would make AIPS look for tables that don’t exist; is that appropriate?

3. “UVFLG2: ANREFM: NO ANTENNA OR ARRAY RECOGNIZED” Actually, UVFLG does seem to recognize antennas and flag the ones specified, so the reason for this message is unclear.  Is it OK?

Thanks for any advice or comments you can provide!  Longer versions of the messages are appended below.

Best wishes,

Bob Gray

FITLD2: Task FITLD  (release of 31DEC16) begins
FITLD2: Found wowcente observed on 22-SEP-2016
FITLD2: WARNING! STOKES VALUES NOT CONVERTED TO NORMAL FORMS
FITLD2: Create 160922WOW-XS.UVATA .   2 (UV)  on disk  1  cno  108
FITLD2: UVFDAT: counts for cross-correlations
FITLD2: UVFDAT: found     214240 spectra samples already flagged
FITLD2: UVFDAT: found     64.000 percent samples already flagged
FITLD2: UVFDAT: omitted     214240 totally flagged vis records
FITLD2: RNXINI: DATA NOT IN TIME ORDER => NO NX TABLE
FITLD2: NXCHCK: ERROR   1 ON INIT INDEX TABLE (RE)WRITE
FITLD2: Image=wowcente  (UV)         Filename=160922WOW-XS.UVATA .   2
FITLD2: Telescope=ATA                Receiver=ATA
FITLD2: Observer=                    User #= 1111
FITLD2: Observ. date=22-SEP-2016     Map date=15-MAR-2017
FITLD2: # visibilities    120510     Sort order
FITLD2: Rand axes: UU-L  VV-L  WW-L  SUBARRAY  TIME1  ANTENNA1  ANTENNA2
FITLD2: ----------------------------------------------------------------
FITLD2: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
FITLD2: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
FITLD2: STOKES       1  -5.0000000E+00       1.00 -1.0000000E+00    0.00
FITLD2: FREQ      1024   1.4124464E+09       1.00  1.2800000E+04    0.00
FITLD2: RA           1    19 26 56.507       1.00       3600.000    0.00
FITLD2: DEC          1   -26 56 59.991       1.00       3600.000    0.00
FITLD2: ----------------------------------------------------------------
FITLD2: Coordinate equinox 2000.00
FITLD2: Rest freq   1419.000         Vel type: RADIO   wrt LSR
FITLD2: Alt ref. value  1.38458E+06  wrt pixel    1.00
FITLD2: Maximum version number of extension files of type HI is   1
FITLD2: Maximum version number of extension files of type AN is   1
FITLD2: Appears to have ended successfully
FITLD2: localhos 31DEC16 TST: Cpu=     13.1  Real=     13  IO=      1416
AIPS 2: Resumes

UVPLT2: Task UVPLT  (release of 31DEC16) begins
UVPLT2: UVGET: doing no flagging this time
UVPLT2: WARNING: uncalibrated linear polarization data may be a problem
UVPLT2: WARNING: uncalibrated linear polarization data may be a problem

>antennas 31; baseline 40; go;
UVFLG2: Task UVFLG  (release of 31DEC16) begins
UVFLG2: ANREFM: NO ANTENNA OR ARRAY RECOGNIZED
UVFLG2: ANREFM: NO ANTENNA OR ARRAY RECOGNIZED
UVFLG2: Wrote        1 flags to flag table version  1
UVFLG2: Appears to have ended successfully
UVFLG2: localhost    31DEC16 TST: Cpu=       0.0  Real=       0
AIPS 2: Resumes


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