[daip] UVPRM bug
Cormac Reynolds
reynolds at jive.nl
Tue Feb 7 08:45:05 EST 2006
Hi,
I think I have found a minor bug in task UVPRM. It seems that stokes='' does
not give the same result as stokes='I' if docal=-1. With docal=1 the results
are the same for stokes='' and stokes='I'. The CL table I used was blank
(original) so should not have affected the data. The results with stokes='I'
appear to be correct.
The dataset I'm working on is missing a lot of the 'RR' data which may be the
root of the cause. Below are the resulting imheader I get
after running UVPRM for each of the polarizations.
>stokes ''
>docal -1
>go
AIPS 2: Resumes
>imh
AIPS 2: Image=3C345 (UV) Filename=3C345 .MULTI . 1
AIPS 2: Telescope=EVN Receiver=VLBA
AIPS 2: Observer=N05K2 User #= 3614
AIPS 2: Observ. date=26-OCT-2005 Map date=07-FEB-2006
AIPS 2: # visibilities 3376 Sort order TB
AIPS 2: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN TIME1 BASELINE
AIPS 2: INTTIM CORR-ID SOURCE FREQSEL WEIGHT SCALE
AIPS 2: ----------------------------------------------------------------
AIPS 2: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 2: COMPLEX 1 0.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 2: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00
AIPS 2: FREQ 1 2.2219490E+10 1.00 8.0000000E+06 0.00
AIPS 2: IF 4 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 2: RA 1 16 42 58.810 1.00 3600.000 0.00
AIPS 2: DEC 1 39 48 36.994 1.00 3600.000 0.00
AIPS 2: ----------------------------------------------------------------
AIPS 2: Coordinate equinox 2000.00
AIPS 2: Rest freq 0.000 Vel type: OPTICAL wrt YOU
AIPS 2: Alt ref. value 0.00000E+00 wrt pixel 0.00
AIPS 2: Maximum version number of extension files of type SU is 1
AIPS 2: Maximum version number of extension files of type CL is 3
AIPS 2: Maximum version number of extension files of type HI is 1
AIPS 2: Maximum version number of extension files of type FQ is 1
AIPS 2: Maximum version number of extension files of type AN is 1
AIPS 2: Maximum version number of extension files of type NX is 1
AIPS 2: Maximum version number of extension files of type SN is 2
LOGFILE FOR USER 3614 GETTING LARGE: USE PRTMSG AND CLRMSG NOW!
AIPS 2: Keyword = 'UVPRAMIN' value = 4.298593E+07
AIPS 2: Keyword = 'UVPRAMAX' value = 9.966523E+07
AIPS 2: Keyword = 'UVPFLUX0' value = 1.195847E+00
AIPS 2: Keyword = 'UVPRMSF0' value = 2.690253E-02
AIPS 2: Keyword = 'UVPFLMIN' value = 0.000000E+00
AIPS 2: Keyword = 'UVPOTIME' value = 2.152778E-02
AIPS 2: Keyword = 'UVPREFAN' value = 2
>stokes = ''
>docal 1
>go
AIPS 2: Resumes
>imh
AIPS 2: Image=3C345 (UV) Filename=3C345 .MULTI . 1
AIPS 2: Telescope=EVN Receiver=VLBA
AIPS 2: Observer=N05K2 User #= 3614
AIPS 2: Observ. date=26-OCT-2005 Map date=07-FEB-2006
AIPS 2: # visibilities 3376 Sort order TB
AIPS 2: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN TIME1 BASELINE
AIPS 2: INTTIM CORR-ID SOURCE FREQSEL WEIGHT SCALE
AIPS 2: ----------------------------------------------------------------
AIPS 2: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 2: COMPLEX 1 0.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 2: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00
AIPS 2: FREQ 1 2.2219490E+10 1.00 8.0000000E+06 0.00
AIPS 2: IF 4 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 2: RA 1 16 42 58.810 1.00 3600.000 0.00
AIPS 2: DEC 1 39 48 36.994 1.00 3600.000 0.00
AIPS 2: ----------------------------------------------------------------
AIPS 2: Coordinate equinox 2000.00
AIPS 2: Rest freq 0.000 Vel type: OPTICAL wrt YOU
AIPS 2: Alt ref. value 0.00000E+00 wrt pixel 0.00
AIPS 2: Maximum version number of extension files of type SU is 1
AIPS 2: Maximum version number of extension files of type CL is 3
AIPS 2: Maximum version number of extension files of type HI is 1
AIPS 2: Maximum version number of extension files of type FQ is 1
AIPS 2: Maximum version number of extension files of type AN is 1
AIPS 2: Maximum version number of extension files of type NX is 1
AIPS 2: Maximum version number of extension files of type SN is 2
AIPS 2: Keyword = 'UVPRAMIN' value = 4.141964E+07
AIPS 2: Keyword = 'UVPRAMAX' value = 3.561773E+08
AIPS 2: Keyword = 'UVPFLUX0' value = 9.587823E-01
AIPS 2: Keyword = 'UVPRMSF0' value = 2.506067E-02
AIPS 2: Keyword = 'UVPFLMIN' value = 0.000000E+00
AIPS 2: Keyword = 'UVPOTIME' value = 2.152778E-02
AIPS 2: Keyword = 'UVPREFAN' value = 3
>stokes ='i'
>docal -1
>go
AIPS 2: Resumes
>imh
AIPS 2: Image=3C345 (UV) Filename=3C345 .MULTI . 1
AIPS 2: Telescope=EVN Receiver=VLBA
AIPS 2: Observer=N05K2 User #= 3614
AIPS 2: Observ. date=26-OCT-2005 Map date=07-FEB-2006
AIPS 2: # visibilities 3376 Sort order TB
AIPS 2: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN TIME1 BASELINE
AIPS 2: INTTIM CORR-ID SOURCE FREQSEL WEIGHT SCALE
AIPS 2: ----------------------------------------------------------------
AIPS 2: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 2: COMPLEX 1 0.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 2: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00
AIPS 2: FREQ 1 2.2219490E+10 1.00 8.0000000E+06 0.00
AIPS 2: IF 4 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 2: RA 1 16 42 58.810 1.00 3600.000 0.00
AIPS 2: DEC 1 39 48 36.994 1.00 3600.000 0.00
AIPS 2: ----------------------------------------------------------------
AIPS 2: Coordinate equinox 2000.00
AIPS 2: Rest freq 0.000 Vel type: OPTICAL wrt YOU
AIPS 2: Alt ref. value 0.00000E+00 wrt pixel 0.00
AIPS 2: Maximum version number of extension files of type SU is 1
AIPS 2: Maximum version number of extension files of type CL is 3
AIPS 2: Maximum version number of extension files of type HI is 1
AIPS 2: Maximum version number of extension files of type FQ is 1
AIPS 2: Maximum version number of extension files of type AN is 1
AIPS 2: Maximum version number of extension files of type NX is 1
AIPS 2: Maximum version number of extension files of type SN is 2
AIPS 2: Keyword = 'UVPRAMIN' value = 4.141964E+07
AIPS 2: Keyword = 'UVPRAMAX' value = 3.561773E+08
AIPS 2: Keyword = 'UVPFLUX0' value = 9.587823E-01
AIPS 2: Keyword = 'UVPRMSF0' value = 2.506067E-02
AIPS 2: Keyword = 'UVPFLMIN' value = 0.000000E+00
AIPS 2: Keyword = 'UVPOTIME' value = 2.152778E-02
AIPS 2: Keyword = 'UVPREFAN' value = 3
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