[daip] DBCon Help

[Eric Greisen]

Jeffrey A. Cornejo wrote:
> Hello,
> 
> My name is jeffrey cornejo and I have been having trouble getting DBCon to merge two X band files. I keep getting an error message saying
> 
> 
> 'DBCON4: Task DBCON  (release of 31DEC09) begins
> DBCON4: RA and DEC match to within 1 microarcsecond each
> DBCON4: --I'm not going to shift positions
> DBCON4: IF       AXIS HAS UNEQUAL ATTRIBUTES
> DBCON4: Purports to die of UNNATURAL causes
> DBCON4: linear       31DEC09 TST: Cpu=       0.0  Real=       0
> AIPS 4: Resumes
> 
> These are my inputs AIPS 4: DBCON     Task which concatenates two uv data bases .
> AIPS 4: Adverbs     Values                 Comments
> AIPS 4: ----------------------------------------------------------------
> AIPS 4: INNAME     '3C175'                 Input UV file name (name)
> AIPS 4: INCLASS    'SPLIT'                 Input UV file name (class)
> AIPS 4: INSEQ         3                    Input UV file name (seq. #)
> AIPS 4: INDISK        1                    Input UV file disk unit #
> AIPS 4: IN2NAME    '3C175'                 2nd input file name.
> AIPS 4: IN2CLASS   'SPLIT'                 2nd input file class.
> AIPS 4: IN2SEQ        4                    2nd input file seq. #
> AIPS 4: IN2DISK       1                    2nd input file disk number
> AIPS 4: REWEIGHT      0           0        Weight factors.
> AIPS 4: OUTNAME    ' '                     Output UV file name (name)
> AIPS 4: OUTCLASS   ' '                     Output UV file name (class)
> AIPS 4: OUTSEQ        0                    Output UV file name (seq. #)
> AIPS 4: OUTDISK       1                    Output UV file disk unit #.
> AIPS 4: DOPOS         1           1        If (1,1) true (+1) check pos.
> AIPS 4:               1           1        will shift second if nec.
> AIPS 4:               1           1        If (2,1) true check freq.
> AIPS 4:               1           1
> AIPS 4: DOARRAY      -1                    If true (+1) output data will
> AIPS 4:                                    be the same subarray as input
> AIPS 4:                                    Forced to +1 for multi-source
> AIPS 4: FQTOL        -1                    > 0 tolerance to not renumber
> AIPS 4:                                      FQs of dataset 2 (in kHz)
> AIPS 4:                                    -1 => no renumbering.

The thing I would have to look at is the IMHEAD of each of the 2 files. 
   The message suggests that the 2 files differ in the IF axis.

Eric Greisen