[daip] Problem with "MATCH"

[Walter Brisken]

Hi DAIP,

Below is a screen capture of MATCH failing to do what was expected by Mark 
Reid, cc'ed above.  I don't see any obvious driver errors here, but maybe 
MATCH was not designed to be used with such different data sets.

The more fundamental problem of how to prevent the antenna ordering issues 
is something that I am thinking about and may contact you later with some 
suggestions...

-Walter

---------- Forwarded message ----------
Date: Thu, 11 Mar 2010 08:33:50 -0500
From: Mark Reid <reid at cfa.harvard.edu>
To: Walter Brisken <wbrisken at aoc.nrao.edu>
Cc: Jon Romney <jromney at aoc.nrao.edu>,
     Anna Bartkiewicz <annan at astro.uni.torun.pl>,
     Andreas Brunthaler <brunthal at mpifr-bonn.mpg.de>
Subject: [Fwd: Re: BR145AH]

Walter,

    We have (again) hit the problem that the VLBA correlator can produce data 
sets with different antenna numbering for the same observation.

In the past, we have been able to run MATCH and fix things up, albeit with a 
cost in analysis time.

For BR145AH, however, we seem stuck.  We have continuum data correlated with 16 
channels that have different antennas (even one missing) compared to the maser 
line data with 512 channels.   See the aborted run of MATCH listed below.   Any 
advice?

Looking to the future, is there any way for our VLBA-only observations that we 
could get a fixed antenna numbering system.  That would avoid problems when 
someone doesn't catch different antenna numberings and totally screws things 
up.   Even if we catch these problems, it does complicate data processing.  We 
are trying to automate things and "little" problems like these do cause trouble 
and extra work.

Mark

-------------------------------------------------------------
Mark J. Reid                 Phone: 617-495-7470
Harvard-Smithsonian CfA      Fax  : 617-495-7345
60 Garden Street             Email: reid at cfa.harvard.edu
Cambridge, MA 02138, USA     Web  : www.cfa.harvard.edu/~reid
-------------------------------------------------------------

G037.43 is different (at U) from them.
When I try:
AIPS 2: MATCH    Task to modify source, antenna, FQ numbers to match
AIPS 2: Adverbs     Values                 Comments
AIPS 2: ----------------------------------------------------------------
AIPS 2: INNAME     'BR145-AH.U16'          Input UV file name (name)
AIPS 2: INCLASS    'UVDATA'                Input UV file name (class)
AIPS 2: INSEQ         1                    Input UV file name (seq. #)
AIPS 2: INDISK        1                    Input UV file disk unit #
AIPS 2: IN2NAME    'G037.43'               Master UV file name.
AIPS 2: IN2CLASS   'UVDATA'                Master UV file class.
AIPS 2: IN2SEQ        1                    Master UV file seq. #
AIPS 2: IN2DISK       1                    Master UV file volumn number
AIPS 2: OUTNAME    ' '                     Output UV file name (name)
AIPS 2: OUTCLASS   ' '                     Output UV file name (class)
AIPS 2: OUTSEQ        0                    Output UV file name (seq. #)
AIPS 2: OUTDISK       1                    Output UV file disk unit #.
AIPS 2: DOALL         1                    Do antenna, source, frequency
AIPS 2:                                    flags

I get:
ring2 > MATCH2:  Create BR145-AH.U16.MATCH .   1 (UV)  on disk  1  cno   23
ring2 > MATCH2:  Subarray  1 no ants in file 1 10 file 2  9 not same
ring2 > MATCH2:  ANT  1 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  2 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  3 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  4 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  5 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  6 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  7 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  8 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT  9 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  ANT 10 SUBARR  1 HAS NO MATCH - APPEND IT
ring2 > MATCH2:  WARNING: FREQUENCIES NOT MATCHED
ring2 > MATCH2:  TABINI: Deleting old FQ table version   1
ring2 > MATCH2:  WARNING: SOURCES NOT MATCHED
ring2 > MATCH2:  TABINI: Deleting old SU table version   1
ring2 > MATCH2:  ZMI2: REQUEST FOR BYTES 1 THRU = 199680 BEYOND EOF = 163840
ring2 > MATCH2:  ZMIO: OPER=WRIT LUN=17 BLKNO=           1 8-BIT-BYTES=199680
ring2 > MATCH2:  ZERROR: IN ZMI2 ERRNO = 22 (Invalid argument)
ring2 > MATCH2:  ZWAIT: ZWAI2 RETURNS ERROR 3 FOR LUN = 17 BUFFER = 2
ring2 > MATCH2:  ZERROR: IN ZWAI2  ERRNO = 22 (Invalid argument)
ring2 > MATCH2:  MATCUV: ERROR  3 WRITING VIS FILE
ring2 > MATCH2:  Destroyed  1 extension files of type AN
ring2 > MATCH2:  Destroyed UV image file: catno=     23 disk= 1
ring2 > MATCH2:  Purports to die of UNNATURAL causes