[daip] Problems with 31DEC03 UVCON
Leonia Kogan
lkogan at aoc.nrao.edu
Thu Mar 6 15:28:59 EST 2003
Sean,
1.UVCON has a pointing error simulation only if CMODEL='COMP' and CMETHOD='DFT.
If it is not true then UVCON forces CMODEL='COMP' and CMETHOD='DFT.
Pointing error simulation works if one of BPARM(3,4,5) greater than zero.
You do not print out for me BPARM(3,4,5) terminating at BPARM(2).
I guess you have one of BPARM(3,4,5) greater than zero.
Try UVCON with BPARM=-1,0
2.I see you use BPARM(2)=-1. BPARM(2) is atmosphere noise at zenith in degrees
There is no sence in atmosphere noise at zenith =-1
3.You use CMODEL='IMAGE' and CMETHOD=''. It is better to use CMETHOD='GRID'
with CMODEL='IMAGE'.
The item 2,3 are carelessness which should be corrected, but do not
explain the problem
The item 1 is important
Leonia
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Subject: Problems with 31DEC03 UVCON
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Leonia,
I have recently installed the 31DEC03 version of AIPS. However, I seem
to run into some problems which
seem rather fundamental. I include both the output from AIPS and the
inputs for UVCON. Note that
even though I specify I am using an IMAG file for input, it seems that
the program still goes off looking
for CC's. And why is it asking about the frequency axis - the frequency
information of interest is included
in the APARM inputs?
I suspect I am screwing up somewhere given that I know UVCON is used
extensively for array studies for the EVLA and ALMA. However, I note
that the same files and UVCON inputs run fine under 31DEC01
Sean
BALDRI> UVCON1: Task UVCON (release of 31DEC03) begins
BALDRI> UVCON1: ZTXOP2: using translated file name =
BALDRI> UVCON1: ZTXOP2:
/home/smd/projects/wr147/merlin_sim/merlinstg.ant
BALDRI> UVCON1: Number of antennas = 6
BALDRI> UVCON1: Site latitude = 53.000 degrees
BALDRI> UVCON1: Site longtitude = 0.000 degrees
BALDRI> UVCON1: Coordinate conversion factor to meters = 1.00000E+00
BALDRI> UVCON1: Diameter conversion factor to meters = 1.00000E+00
BALDRI> UVCON1: A( 1): 3923069. -146804. 5009321.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 1): 3923069. -146804. 5009321.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 2): 3919983. 2652. 5013850.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 2): 3919983. 2652. 5013850.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 3): 3859712. -201995. 5056134.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 3): 3859712. -201995. 5056134.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 4): 3828715. -169459. 5080648.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 4): 3828715. -169459. 5080648.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 5): 3822473. -153692. 5085851.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 5): 3822473. -153692. 5085851.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 6): 3817177. -162921. 5089462.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: A( 6): 3817177. -162921. 5089462.; d= 25. ef= 0.50 T=
75.0 2
BALDRI> UVCON1: CMETHOD and CMODEL are forced to DFT and COMP
BALDRI> UVCON1: TABINI: REQUESTED CC FILE 0 DOES NOT EXIST
BALDRI> UVCON1: PROBLEM WITH CC FILE(ERROR= 2), WILL USE THE IMAGE
BALDRI> UVCON1: *** WARNING: OVERRIDING SPECIFIED COMPUTATION METHOD
BALDRI> UVCON1: SETGDS: imaging done with one OFFSET tangent plane
BALDRI> UVCON1: CHNDAT:COULD NOT FIND FREQ AXIS
BALDRI> UVCON1: FRQTAB: CHNDAT ERROR 1
BALDRI> UVCON1: Purports to die of UNNATURAL causes
BALDRI> UVCON1: baldrick 31DEC03 TST: Cpu= 0.1 Real= 0
AIPS 1: UVCON Generates UV data for a given array and model
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INFILE 'PWD:merlinstg.ant Antenna location file name
AIPS 1:
AIPS 1: '
AIPS 1: OUTFILE *all ' ' Antenna location file name
AIPS 1: Positions are in equatorial
AIPS 1: coordinate system.
AIPS 1: IN2NAME 'WR147 ' Model image name (name)
AIPS 1: IN2CLASS 'MODEL ' Model image name (class)
AIPS 1: IN2SEQ 1 Model image name (seq. #)
AIPS 1: IN2DISK 0 Model image disk unit #
AIPS 1: INVERS 0 CC file version #.
AIPS 1: OUTNAME ' ' Output UV file name (name)
AIPS 1: OUTCLASS ' ' Output UV file name (class)
AIPS 1: OUTSEQ 0 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 ' ' Modeling method:
AIPS 1: 'DFT','GRID'; ' '=>DFT
AIPS 1: CMODEL 'IMAG' Model type: 'COMP','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 HELP SMODEL for models.
AIPS 1: RASHIFT *all 0 Shift of the model center
AIPS 1: relatively of the initial
AIPS 1: RA=0, per field (asec)
AIPS 1: DECSHIFT *all 0 Shift of the model center
AIPS 1: relatively of the initial
AIPS 1: declinat., given at APARM(3)
AIPS 1: per field (asec)
AIPS 1: APARM 4.8 0 Control information:
AIPS 1: 40.352 -6 1: Frequency of chan. 1, GHz
AIPS 1: 6 0 2: Wavelength of ch 1, cm
AIPS 1: 30 16 IF both .LE. 0 then
AIPS 1: 0 0 wavelength = 0.1 cm
AIPS 1: 3: Source declination, deg
AIPS 1: 4: Min hour angle, hours
AIPS 1: 5: Max hour angle, hours
AIPS 1: The hour angles are for
AIPS 1: the given array center
AIPS 1: 6: Min antenna elevation, deg
AIPS 1: 7: Integration time, sec
AIPS 1: 8: Bandwidth of first freq.
AIPS 1: channel, MHz
AIPS 1: 9: Number of freq. channels
AIPS 1: 0 => 1
AIPS 1: 10: Max blockage allowed
AIPS 1: BPARM -1 -1 Control information:
A
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