[daip] DTSIM

[Leonia Kogan]

Kaj,

I strongly recomend you using the task UVCON instead of DTSIM 
for simulation.

UVCON has more flexible antenna positions and source presentation.

Leonia
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>From daip-admin at donar.cv.nrao.edu Wed May 22 11:10 MDT 2002
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From: Kaj Wiik <wiik at oj287.astro.utu.fi>
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Subject: [daip] DTSIM
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Date: Wed, 22 May 2002 19:18:11 +0300 (EEST)
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Hi!

I am trying to simulate some snapshot experiments with DTSIM. I am having
problems with SU_MODEL, it seems that only the last TYPE key is taken into
account..(i.e. I am getting only single point source models, see my file
at the end of this message).

So, what is the correct syntax for structure consisting of multiple point 
sources?

I think a moderately complex example file would be most useful (I have 
looked at aips/31DEC01/RUN/DTSIM* files but they use only simple source 
models).

Also to introduce constant noise to the simulation, should I use the
CAL_ERR TSYS_np offset parameter?

Regards,

Kaj Wiik
Tuorla Observatory,
Finland

--------

!
AN_TABLE VER=1 /
   STATION = 'ALL_VLBA' /
!   STATION = 'VLBA_HN' /
!   STATION = 'VLBA_NL' /
!   STATION = 'VLBA_FD' /
!   STATION = 'VLBA_LA' /
!   STATION = 'VLBA_PT' /
!   STATION = 'VLBA_KP' /
!   STATION = 'VLBA_OV' /
!   STATION = 'VLBA_MK' /
END /
!
! FQ table data
!
FQ_TABLE /
   FQID = 1
   FREQ   = 86243.35
   TOTBW  = 128.0
   CHANBW = 128.0
   SIDE   = 1 /
END /
!
SU_TABLE /
   SU_ID = 1
   NAME = '3C279'
   RAEPO = 12:56:11.1665602
   DECEPO = -05:47:21.524580
   EPOCH = 2000 /
END /
!
! Catalog header
!
CAT_HDR /
   REF_FREQ = 86243.35
   NO_IF = 1
   NO_CHAN = 1
   STOKES = 'RR'
   REF_DATE = '22/05/02'/
!
SU_MODEL /
   SOURCE = '3C279'
   TYPE = 1,0,0,12.7,0,0,0 
   TYPE = 1,-0.000251,-0.000243,7.55,0,0,0 
   TYPE = 1,-0.000414,-0.000460,0.09,0,0,0  /
!   TYPE = 1,-0.000874,-0.000484,0.05,0,0,0,0,0,0,0,0  /
!   TYPE = 1,-0.003060,-0.001362,1.70,0,0,0,0,0,0,0,0 /
!   TYPE = 1,-0.003060,-0.001362,1.70,0,0,0,0,0,0,0,0 /
END /
!
! Schedule records
!

SCHEDULE /
   START = 17:30:00   STOP = 18:00:00
   DAY = 28   MONTH = 10   YEAR = 2002
   SOURCE = '3C279'   SUBA = 1   FQID = 1
   TINT = 2 /
END /
!

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