[daip] GMRT data- UVFLP-BLOAT-DBCON
gcastell at iafe.uba.ar
gcastell at iafe.uba.ar
Tue May 13 13:03:01 EDT 2008
Dear all,
I am working on GMRT data at 610 MHz, I am using the 31DEC08 version of AIPS.
1) I have two files of 128 channels, for the LSB and USB data.
2) I ran splat on the LSB data and also on the USB data. I obtained two
new files of 7 channels.
Concerning to SPLAT, I would like to know if the 31DEC08 version of AIPS
has any problem (I read some emails about bugs in previous
AIPS version).
Below you can see the header for these files:
I averaged 16 channels together, after selecting channels from 5 to 116 in
each sideband
**USB DATA**
AIPS 1: Image=MULTI (UV) Filename=610_26_A_NEW.SPLAT . 1
AIPS 1: Telescope=GMRT Receiver=GMRT
AIPS 1: Observer=APR User #= 338
AIPS 1: Observ. date=25-FEB-2008 Map date=08-MAY-2008
AIPS 1: # visibilities 273196 Sort order TB
AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1
AIPS 1: SOURCE
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 1: COMPLEX 3 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 1: STOKES 1 -1.0000000E+00 1.00 -1.0000000E+00 0.00
AIPS 1: FREQ 7 6.1250000E+08 1.00 -2.0000000E+06 0.00
AIPS 1: IF 1 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 1: RA 1 00 00 00.000 1.00 3600.000 0.00
AIPS 1: DEC 1 00 00 00.000 1.00 3600.000 0.00
AIPS 1: ----------------------------------------------------------------
**LSB DATA*
>imhe
AIPS 1: Image=MULTI (UV) Filename=610_26_B_NEW.SPLAT . 1
AIPS 1: Telescope=GMRT Receiver=GMRT
AIPS 1: Observer=APR User #= 338
AIPS 1: Observ. date=25-FEB-2008 Map date=09-MAY-2008
AIPS 1: # visibilities 287112 Sort order TB
AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN BASELINE TIME1
AIPS 1: SOURCE
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 1: COMPLEX 3 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 1: STOKES 1 -1.0000000E+00 1.00 -1.0000000E+00 0.00
AIPS 1: FREQ 7 6.1550000E+08 1.00 2.0000000E+06 0.00
AIPS 1: IF 1 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 1: RA 1 00 00 00.000 1.00 3600.000 0.00
AIPS 1: DEC 1 00 00 00.000 1.00 3600.000 0.00
AIPS 1: ----------------------------------------------------------------
3) After SPLAT, I ran UVFLP on the LSB data to re-ordering the data. Then,
I ran BLOAT, both on the output of UVFLP and on the output for SPLAT on
the USB data.
the inputs for BLOAT were:
** LSB DATA **
3723 BLOAT RELEASE ='31DEC08 ' /********* Start 13-MAY-2008 12:44:50
3724 BLOAT INNAME='G338_610_26B' INCLASS='UVFLP '
3725 BLOAT INSEQ= 1 INDISK= 1
3726 BLOAT OUTNAME='G338_610_26B' OUTCLASS='BLOAT '
3727 BLOAT OUTSEQ= 1 OUTDISK= 1
3728 BLOAT APARM(2) = 1 /1ST CHAN. NO. OF INPUT.
3729 BLOAT APARM(1) = 15 /NUMBER OF OUTPUT CHANNELS
3730 BLOAT APARM(3) = 1 / FIRST CHAN. COPIED.
3731 BLOAT APARM(3) = 7 / FIRST CHAN. COPIED.
3732 BLOAT /REFERENCE FREQ = 0.61550000E+09
** USB DATA**
2478 BLOAT RELEASE ='31DEC08 ' /********* Start 13-MAY-2008 12:48:36
2479 BLOAT INNAME='G338_610_26A' INCLASS='UVCOP '
2480 BLOAT INSEQ= 1 INDISK= 1
2481 BLOAT OUTNAME='G338_610_26A' OUTCLASS='BLOAT '
2482 BLOAT OUTSEQ= 1 OUTDISK= 1
2483 BLOAT APARM(2) = 9 /1ST CHAN. NO. OF INPUT.
2484 BLOAT APARM(1) = 15 /NUMBER OF OUTPUT CHANNELS
2485 BLOAT APARM(3) = 1 / FIRST CHAN. COPIED.
2486 BLOAT APARM(3) = 7 / FIRST CHAN. COPIED.
2487 BLOAT /REFERENCE FREQ = 0.61250000E+09
5) For DBCON I used the following inputs
AIPS 1: INNAME 'G338_610_26B'
AIPS 1: INCLASS 'BLOAT'
AIPS 1: IN2NAME 'G338_610_26A'
AIPS 1: IN2CLASS 'BLOAT'
AIPS 1: REWEIGHT 0 0
AIPS 1: DOPOS 1 1 If (1,1) true (+1) check pos.
AIPS 1: 1 1 will shift second if nec.
AIPS 1: 1 1 If (2,1) true check freq.
AIPS 1: 1 0
AIPS 1: DOARRAY -1 If true (+1) output data will
AIPS 1: be the same subarray as input
AIPS 1: Forced to +1 for multi-source
AIPS 1: FQTOL -1 > 0 tolerance to not renumber
AIPS 1: FQs of dataset 2 (in kHz)
localh> DBCON1: Task DBCON (release of 31DEC08) begins
localh> DBCON1: Scaling u,v,w of data set 2 by 1.0261224E+00
localh> DBCON1: Scaling u,v,w of data set 1 by 1.0194963E+00
localh> DBCON1: RA and DEC match to within 1 microarcsecond each
localh> DBCON1: --I'm not going to shift positions
localh> DBCON1: FREQUENCIES DIFFER BY TOO MUCH: 6.27500000E+08
6.28500000E+08
localh> DBCON1: MULTI-FREQUENCY DATA BASES INCOMPATABLE
localh> DBCON1: Purports to die of UNNATURAL causes
localh> DBCON1: athos 31DEC08 TST: Cpu= 0.0 Real= 0
I don't know what is wrong. Please, could you help me with my problem???
I really need your comments!
Thanks a lot for any information.
Gabi
More information about the Daip
mailing list