[daip] forwarded message from Stuart Weston

Eric Greisen egreisen at nrao.edu
Sun May 14 13:15:31 EDT 2006


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From: Stuart Weston <stuartweston at astronomy.org.nz>
To: egreisen at nrao.edu
Subject: AIPS UVCON
Date: Sat, 13 May 2006 23:03:15 +1200

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Dear Eric,

I am a M.Phil Student at the Auckland University of Technology in New 
Zealand researching VLBI Array & Aperture Synthesis Modeling in 
collaboration with Swinburne, Australia. We are a new small team and 
currently with little to no in-house expertise (I am it) with software 
such as AIPS, so I am learning it the hard way (trial and error on my 
own :'( ).

http://www.aut.ac.nz/about/faculties/design_and_creative_technologies/research/centre_for_radiophysics_and_space_research/links.htm

Currently I am trying to get acquainted with aips and most specifically 
UVCON. I am fighting a loosing battle at the moment, there isn't a 
"UVCON for dummies" ?

I load in the image from: 
http://www.oso.chalmers.se/~jconway/ALMA/IMAGES/ , I have used M501V2.

I can view the image using "TVLOD" no problem. It is in my AIPS 
catalogue "MCAT" as seq 47.

I call up task "uvcon" and modify the param's: See uvcon.txt

Then lets try "go". It seems' to be happy with my antenna input file but 
is not happy with the image.

Its a real descriptive error :-(          like all things aips: see 
attached uvcon.msg

UVCON1: ERROR  5 FINDING TEST        .      . 47     DISK=  1 USID=   2
UVCON1: ZCREAT: INVALID BYTE REQUEST =   -67108859
UVCON1: SCREAT: DISK  1 ERROR    4 ON SCRATCH CREATE
UVCON1: SCREAT: FAILED TO CREATE REQUESTED SCRATCH FILE
UVCON1: ERROR  5 CREATING SCRATCH FILE
UVCON1: Purports to die of UNNATURAL causes

If I go:

   aips > getn 47
   aips > tvlod

   Then up pops the image in the tv window

   aips> mcat
   AIPS 1:   47    2 TEST        .IMAG  .    2 MA 13-MAY-2006 21:01:47

So I am stumped at the moment. I have tried "playing" but to no avail 
currently. I'll keep plugging away and if you have any ideas or hints 
they would be very gratefully received.

Thanks in advance

- -- 

Stuart Weston

email: stuartweston at astronomy.org.nz
phone: 09-4138281


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UVCON1: Task UVCON  (release of 31DEC06) begins
UVCON1: ZTXOP2: using translated file name =
UVCON1: ZTXOP2: /home/aipswrk/NZAU.AN
UVCON1: Number of antennas =    6
UVCON1: Site latitude =    0.000 degrees
UVCON1: Site longtitude =    0.000 degrees
UVCON1: Coordinate conversion factor to meters = 1.00000E+00
UVCON1: Diameter conversion factor to meters = 1.00000E+00
UVCON1: A(   1):-4752008. 2791332.-3200198.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: A(   1):*********-4752008. 2791332.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: A(   2):-4682769. 2802619.-3291760.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: A(   2):*********-4682769. 2802619.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: A(   3):-4554232. 2816759.-3454036.; d= 64. ef= 0.40 T=  25.0  2
UVCON1: A(   3):*********-4554232. 2816759.; d= 64. ef= 0.40 T=  25.0  2
UVCON1: A(   4):-3950237. 2522348.-4311563.; d= 26. ef= 0.40 T=  47.0  2
UVCON1: A(   4):*********-3950237. 2522348.; d= 26. ef= 0.40 T=  47.0  2
UVCON1: A(   5):-5114017.  492424.-3767045.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: A(   5):*********-5114017.  492424.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: A(   6):-4305611.  890996.-4604963.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: A(   6):*********-4305611.  890996.; d= 22. ef= 0.40 T=  32.0  2
UVCON1: ERROR  5 FINDING TEST        .      . 47     DISK=  1 USID=   2
UVCON1: ZCREAT: INVALID BYTE REQUEST =   -67108859
UVCON1: SCREAT: DISK  1 ERROR    4 ON SCRATCH CREATE
UVCON1: SCREAT: FAILED TO CREATE REQUESTED SCRATCH FILE
UVCON1: ERROR  5 CREATING SCRATCH FILE
UVCON1: Purports to die of UNNATURAL causes
UVCON1: linux01      31DEC06 TST: Cpu=       0.0  Real=       0
AIPS 1: Resumes


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PS 1: UVCON     Generates UV data for a given array and model
AIPS 1: Adverbs     Values                 Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INFILE     'WORK:NZAU.AN'          Antenna location file name
AIPS 1: IN2FILE    *all ' '                TSYS and Efficiency
AIPS 1:                                    BLANK=>INFILE's data are used
AIPS 1:                                    for TSYS and Efficiency
AIPS 1: OUTFILE    *all ' '                Antenna location file name
AIPS 1:                                    Positions are in equatorial
AIPS 1:                                    coordinate system.
AIPS 1: IN2NAME    'TEST'                  Model image name (name)
AIPS 1:                                    The both dimensions of the
AIPS 1:                                    model must be 2**N pixels
AIPS 1: IN2CLASS   ' '                     Model image name (class)
AIPS 1: IN2SEQ       47                    Model image name (seq. #)
AIPS 1: IN2DISK       1                    Model image disk unit #
AIPS 1: INVERS        1                    CC file version #.
AIPS 1: OUTNAME    'WORK:TEST47'           Output UV file name (name)
AIPS 1: OUTCLASS   ' '                     Output UV file name (class)
AIPS 1: OUTSEQ       47                    Output UV file name (seq. #)
AIPS 1: OUTDISK       1                    Output UV file disk unit #.
AIPS 1: NMAPS         0                    No. maps to use for model.
AIPS 1: BCOMP      *all 0                  First CLEAN comp to sub.
AIPS 1:                                    1 per field. 0 => 1
AIPS 1: NCOMP      *all 0                  Last CLEAN comp to sub.
AIPS 1:                                    to use (0 => all)
AIPS 1: FLUX          0                    Lowest CC component used.
AIPS 1: CMETHOD    'DFT'                   Modeling method:
AIPS 1:                                    'DFT','GRID'; '    '=>DFT
AIPS 1: CMODEL     'COMP'                  Model type: 'COMP','IMAG'
AIPS 1:                                    '   ' => 'COMP'
AIPS 1:                                              if clean components
AIPS 1:                                                 present
AIPS 1:                                              else => 'IMAG'
AIPS 1: FACTOR        0                    Factor times model fluxes.
AIPS 1:                                    0 => 1
AIPS 1: SMODEL     *all 0                  Source model, 1=flux,2=x,3=y
AIPS 1:                                    See 'explain'.
AIPS 1: RASHIFT    *all 0                  Shift of the model center
AIPS 1:                                    relatively of the initial
AIPS 1:                                    RA=0, per field (asec)

The rest are as defult.

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;   NZ-AU.ANT 
;   This is the file of a proposed NZ-AUS VLBA configuration written at
;   the format of input file for the AIPS task UVCON
;
;   Stuart Weston - Auckland University of Technology, 2006
;-----------------------------------------------------------------------
;   Station        Code   Latitude Longitude Elevation        X           Y           Z 
;
;   ATCA            At  -30.31000  -149.57000    217.   -4752008.07  2791332.20 -3200197.64
;   MOPRA           Mp  -31.26782  -149.09964    867.   -4682768.63  2802619.06 -3291759.90
;   PARKES          Pa  -32.99840  -148.26351    415.   -4554232.01  2816758.96 -3454035.85
;   HOBART          Ho  -42.80359  -147.44052     65.   -3950236.74  2522347.55 -4311562.54
;   Warkworth NI,NZ Wa  -36 26 0.0 -174 30 0.0   100.   -5114016.53  492423.78  -3767044.56
;   Awarua SI,NZ    Aw  -46 31 0.0 -168 18 30.0   10.   -4305611.17  890996.14  -4604962.76
6
0.0 0.0
1 1
1 -4752008.07  2791332.20 -3200197.64 22 0.4 32 2
1 -4682768.63  2802619.06 -3291759.90 22 0.4 32 2
1 -4554232.01  2816758.96 -3454035.85 64 0.4 25 2
1 -3950236.74  2522347.55 -4311562.54 26 0.4 47 2
1 -5114016.53  492423.78  -3767044.56 22 0.4 32 2
1 -4305611.17  890996.14  -4604962.76 22 0.4 32 2

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