[daip] [!5506]: aips - CALIB of a XY dataset using Stokes I cc's

[Tracy Clarke]

Tracy Clarke updated #5506
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CALIB of a XY dataset using Stokes I cc's
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           Ticket ID: 5506
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/5506
           Full Name: Tracy Clarke
               Email: tracy.clarke at nrl.navy.mil
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 17 September 2014 01:52 AM
             Updated: 17 September 2014 01:52 AM
                 Due: 19 September 2014 01:52 AM (2d 0h 0m)
      Resolution Due: 25 September 2014 01:52 AM (8d 0h 0m)



I tried to run a calib (phase-only self-cal) with an input cc model attached to a Stokes I image. If I try to
apply this to the uv data that are liners (XY) then I get the messages that is fails (below). I changed the uv
header to be circulars (RL) and run calib again and it was successful (second set of messages below).

CALIB2 19:46:00 Task CALIB  (release of 31DEC14) begins
CALIB2 19:46:00 Using 3C345 . SPLIT . 1  Disk= 2 Usid= 1014
CALIB2 19:46:00 L1 Solution type
CALIB2 19:46:00 WARNING: Calibration will be determined from selected
CALIB2 19:46:00          frequency channels but applied to all channels
CALIB2 19:46:00 UVGET: Using flag table version   1 to edit data
CALIB2 19:46:00 WARNING: uncalibrated linear polarization data may be a problem
CALIB2 19:46:00 Selecting and editing the data
CALIB2 19:46:01 Using Clean Component self-cal source model
CALIB2 19:46:01 FACSET: 11.127852 Jy found from 111 components
CALIB2 19:46:01 QINIT: did a GET  of      5120 Kwords, OFF   17577501802221
CALIB2 19:46:01 VISDFT: Begin DFT component division
CALIB2 19:46:01 VISDFT: fields 1 - 1 chns 1 - 237 in 1 CC models
CALIB2 19:46:01 VISDFT: Model components of type Point
CALIB2 19:46:01 I Polarization model processed
CALIB2 19:46:01 GETCTL: MAP STOKES TYPE INCOMPATIBLE WITH UV DATA
CALIB2 19:46:01 KSTOK=    1, ICOR0=   -5, NCOR=    2
CALIB2 19:46:01 Purports to die of UNNATURAL causes
CALIB2 19:46:01 hamal 31DEC14 TST: Cpu=      0.5  Real=      1  IO=       579

Next I did the puthead change to RL and re-ran calib:

CALIB2 19:47:29 Task CALIB  (release of 31DEC14) begins
CALIB2 19:47:29 Using 3C345 . SPLIT . 1  Disk= 2 Usid= 1014
CALIB2 19:47:29 L1 Solution type
CALIB2 19:47:29 WARNING: Calibration will be determined from selected
CALIB2 19:47:29          frequency channels but applied to all channels
CALIB2 19:47:29 UVGET: Using flag table version   1 to edit data
CALIB2 19:47:29 Selecting and editing the data
CALIB2 19:47:29 Using Clean Component self-cal source model
CALIB2 19:47:29 FACSET: 11.127852 Jy found from 111 components
CALIB2 19:47:29 QINIT: did a GET  of      5120 Kwords, OFF   17503181002989
CALIB2 19:47:29 VISDFT: Begin DFT component division
CALIB2 19:47:29 VISDFT: fields 1 - 1 chns 1 - 237 in 1 CC models
CALIB2 19:47:29 VISDFT: Model components of type Point
CALIB2 19:47:29 I Polarization model processed
CALIB2 19:47:29 VISDFT at visibility number           1
CALIB2 19:47:31 Model computation is    10 percent complete
CALIB2 19:47:33 Model computation is    20 percent complete
CALIB2 19:47:35 Model computation is    30 percent complete
CALIB2 19:47:36 Model computation is    40 percent complete
CALIB2 19:47:39 Model computation is    50 percent complete
CALIB2 19:47:41 Model computation is    60 percent complete
CALIB2 19:47:42 Model computation is    70 percent complete
CALIB2 19:47:44 Model computation is    80 percent complete
CALIB2 19:47:46 Model computation is    90 percent complete
CALIB2 19:47:47 Field    1 used     111 CCs
CALIB2 19:47:47 Determining solutions using full vector averaging
CALIB2 19:47:47 Writing SN table    5
AIPS 2: ** press RETURN for more, enter Q or next line to quit print **
#
 hamal     AIPS (31DEC14)   1014     16-SEP-2014  19:50:05    Page    3
task     time   messages for user 1014
CALIB2 19:47:47 Found          486 good solutions
CALIB2 19:47:47 Average closure rms =  0.08835 +-  0.01919


Cheers,

Tracy


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