[daip] [!6494]: aips - Problems with DBCON - 31DEC15

[Gabriela Castelletti]

Gabriela Castelletti updated #6494
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Problems with DBCON - 31DEC15
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           Ticket ID: 6494
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/6494
           Full Name: Gabriela Castelletti
               Email: gcastell at iafe.uba.ar
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 22 April 2015 05:46 PM
             Updated: 22 April 2015 05:46 PM
                 Due: 24 April 2015 05:46 PM (2d 0h 0m)
      Resolution Due: 30 April 2015 05:46 PM (8d 0h 0m)



Dear Eric,

I am sorry for disturbing you again in relation to DBCON. The good news is that now DBCON runs. The bad news for me is that the amount of visibilities are drastically reduced for the subarray 2 (output from DBCON). 

Below I detailed the steps that I followed before running DBCON:
1) I investigated the "sum of weights" that gives IMAGR for both inputs files that will be used in DBCON 
(of course, I used the same cell, imsize, etc for both files). The numbers are the following,

file 1 (# visibilities    517790): 
localh> IMAGR1: UVWAIT: Sum of weights in  2.210E+07 and out  4.940E+07

file 2 (# visibilities    404036): 
localh> IMAGR1: UVWAIT: Sum of weights in  9.059E+06 and out  1.961E+07

2) In view of this, I ran DBCON using REWEIGHT= 1    2.21E07/9.059E06 = 1 2.4396:

INNAME     'J1731feb15'         
INCLASS    'UVCOP'                
INSEQ         1                          INDISK        1      
IN2NAME    'J1731feb17'      
IN2CLASS   'UVCOP'                
IN2SEQ        1                    
IN2DISK       1                    
REWEIGHT      1        2.4396
OUTNAME    'J1731feb1517'      
OUTCLASS   ' '                     
OUTSEQ        0                    
OUTDISK       1     
DOPOS         1           1       1           1        1           1          1           0    
DOARRAY      -1 
FQTOL        -1            FQCENTER      1                  

No errors were declared by DBCON, however an inspection of both subarrays with UVPLT and IMAGR, show me that the subarray 2 has only 45 visibilities instead a number similar to 404036 as the input second file used to run DBCON.

I would be grateful if you can help me with this new problem.
Thank you very much in advance,
Best Regards
Gabriela Castelletti

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