[daip] AIPS CLCOR problem
Chris Williams
williams at sne.nrl.navy.mil
Fri Dec 17 17:19:30 EST 2004
Hi,
I am trying to use CLCOR with opcode 'ANTP' to adjust the positions of some of
my sources, and I am getting some very peculiar behavior.
The first time I run CLCOR, it offsets the source by a strange amount
differently than what I had specified. However, if I run it again on the same
file, it works properly (offsetting from the now new, strange position). I have
attached a text file with an example of what I am doing, and what it is
producing (hopefully so it won't end up with crazy formatting).
I am trying to adjust the declination of source 1159-218 from -21:48:53.707 to
-21:48:52.707 by using CLCORPRM(6)=1. When I run this the first time, however,
it gives me back -21:48:52.690! If I use tget and run clcor with the same
parameters again on the file, it works correctly, changing the source position
to -21:48:50.690. However, it never works correctly the first time. Only
subsequent times.
I was wondering if you perhaps had any suggestions, or see that I am doing
something wrong, or know of a better way to modify a source position.
Thanks,
Chris
-----------
Chris Williams
Naval Resarch Lab
-------------- next part --------------
>task 'listr'
>opty 'scan'
>go
sne LISTR(31DEC03) 1941 17-DEC-2004 17:01:17 Page 1
File = AR555 .UVCOP . 1 Vol =18 Userid = 1941
Freq = 8.435100000 GHz Ncor = 4 No. vis = 3397883
Scan summary listing
Scan Source Qual Calcode Sub Timerange FrqID START VIS END VIS
4 1159-218 : 0000 L 1 0/19:34:27 - 0/19:35:20 1 39307 44125
961 1159-218 : 0000 L 1 7/17:10:10 - 7/17:11:10 1 3139085 3143437
Source summary
Velocity type = 'TOPOCENT' Definition = ' '
ID Source Qual Calcode RA(2000.0) Dec(2000.0) IFlux QFlux UFlux VFlux No. vis
4 1159-218 : 0000 L 11:59:51.9061 -21:48:53.707 0.000 0.000 0.000 0.000 9172
IF( 2) 0.000 0.000 0.000 0.000
ID Source Freq(GHz) Velocity(Km/s) Rest freq (GHz)
1 All Sources 8.4351 0.0000 0.0000
IF( 2) 8.4351 0.0000 0.0000
Frequency Table summary
FQID IF# Freq(GHz) BW(kHz) Ch.Sep(kHz) Sideband
1 1 8.43510000 50000.0039 50000.0039 1
2 8.48510000 50000.0039 50000.0039 1
>task 'clcor'
>clcorprm 0 0 0 1 0 1 1 0
>gainver 1
>gainuse 2
>inp
AIPS 1: CLCOR Task which applies various corrections to CL tables.
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME 'AR555 ' Input UV file name (name)
AIPS 1: INCLASS 'UVCOP ' Input UV file name (class)
AIPS 1: INSEQ 1 Input UV file name (seq. #)
AIPS 1: INDISK 18 Input UV file disk unit #
AIPS 1: SOURCES '1159-218 ' Source list ' '=>all.
AIPS 1: *rest ' '
AIPS 1: STOKES ' ' Stokes type to process
AIPS 1: SELBAND -1 Bandwidth to select (kHz)
AIPS 1: SELFREQ -1 Frequency to select (MHz)
AIPS 1: FREQID -1 Freq. ID to select, 0=>all
AIPS 1: BIF 0 Lowest IF number 0=>all
AIPS 1: EIF 0 Highest IF number 0=>all
AIPS 1: TIMERANG *all 0 Time range to use.
AIPS 1: ANTENNAS *all 0 Antennas to correct.
AIPS 1: SUBARRAY 0 Subarray; 0 => 1.
AIPS 1: GAINVER 1 Input CL table 0=>high
AIPS 1: GAINUSE 2 Output CL table: not =
AIPS 1: GAINVER -> high+1
AIPS 1: OPCODE 'ANTP' Operation code.
AIPS 1: CLCORPRM 0 0 Parameters (see HELP CLCOR).
AIPS 1: 0 1 0 1
AIPS 1: 1 *rest 0
AIPS 1: BADDISK *all 0 Disks to aviod for scratch
AIPS 1: INFILE *all ' ' Input file with the list of
AIPS 1: antennas, times and relevant
AIPS 1: atmosphere vertical delay.
AIPS 1: Used only with OPCODE='ATMO'
>
>go clcor
AIPS 1: Resumes
>tget listr
>go
sne LISTR(31DEC03) 1941 17-DEC-2004 17:04:02 Page 1
File = AR555 .UVCOP . 1 Vol =18 Userid = 1941
Freq = 8.435100000 GHz Ncor = 4 No. vis = 3397883
Scan summary listing
Scan Source Qual Calcode Sub Timerange FrqID START VIS END VIS
4 1159-218 : 0000 L 1 0/19:34:27 - 0/19:35:20 1 39307 44125
961 1159-218 : 0000 L 1 7/17:10:10 - 7/17:11:10 1 3139085 3143437
Source summary
Velocity type = 'TOPOCENT' Definition = ' '
ID Source Qual Calcode RA(2000.0) Dec(2000.0) IFlux QFlux UFlux VFlux No. vis
4 1159-218 : 0000 L 11:59:51.9347 -21:48:52.690 0.000 0.000 0.000 0.000 9172
IF( 2) 0.000 0.000 0.000 0.000
ID Source Freq(GHz) Velocity(Km/s) Rest freq (GHz)
1 All Sources 8.4351 0.0000 0.0000
IF( 2) 8.4351 0.0000 0.0000
Frequency Table summary
FQID IF# Freq(GHz) BW(kHz) Ch.Sep(kHz) Sideband
1 1 8.43510000 50000.0039 50000.0039 1
2 8.48510000 50000.0039 50000.0039 1
AIPS 1: Resumes
>tget clcor
>gainver 2
>gainuse 3
>go
AIPS 1: Resumes
>tget listr
>go
sne LISTR(31DEC03) 1941 17-DEC-2004 17:05:13 Page 1
File = AR555 .UVCOP . 1 Vol =18 Userid = 1941
Freq = 8.435100000 GHz Ncor = 4 No. vis = 3397883
Scan summary listing
Scan Source Qual Calcode Sub Timerange FrqID START VIS END VIS
4 1159-218 : 0000 L 1 0/19:34:27 - 0/19:35:20 1 39307 44125
961 1159-218 : 0000 L 1 7/17:10:10 - 7/17:11:10 1 3139085 3143437
Source summary
Velocity type = 'TOPOCENT' Definition = ' '
ID Source Qual Calcode RA(2000.0) Dec(2000.0) IFlux QFlux UFlux VFlux No. vis
4 1159-218 : 0000 L 11:59:51.9347 -21:48:51.690 0.000 0.000 0.000 0.000 9172
IF( 2) 0.000 0.000 0.000 0.000
ID Source Freq(GHz) Velocity(Km/s) Rest freq (GHz)
1 All Sources 8.4351 0.0000 0.0000
IF( 2) 8.4351 0.0000 0.0000
Frequency Table summary
FQID IF# Freq(GHz) BW(kHz) Ch.Sep(kHz) Sideband
1 1 8.43510000 50000.0039 50000.0039 1
2 8.48510000 50000.0039 50000.0039 1
AIPS 1: Resumes
>tget clcor
>gainver 3
>gainuse 4
>go
tAIPS 1: Resumes
>tget listr
>go
sne LISTR(31DEC03) 1941 17-DEC-2004 17:06:07 Page 1
File = AR555 .UVCOP . 1 Vol =18 Userid = 1941
Freq = 8.435100000 GHz Ncor = 4 No. vis = 3397883
Scan summary listing
Scan Source Qual Calcode Sub Timerange FrqID START VIS END VIS
4 1159-218 : 0000 L 1 0/19:34:27 - 0/19:35:20 1 39307 44125
961 1159-218 : 0000 L 1 7/17:10:10 - 7/17:11:10 1 3139085 3143437
Source summary
Velocity type = 'TOPOCENT' Definition = ' '
ID Source Qual Calcode RA(2000.0) Dec(2000.0) IFlux QFlux UFlux VFlux No. vis
4 1159-218 : 0000 L 11:59:51.9347 -21:48:50.690 0.000 0.000 0.000 0.000 9172
IF( 2) 0.000 0.000 0.000 0.000
ID Source Freq(GHz) Velocity(Km/s) Rest freq (GHz)
1 All Sources 8.4351 0.0000 0.0000
IF( 2) 8.4351 0.0000 0.0000
Frequency Table summary
FQID IF# Freq(GHz) BW(kHz) Ch.Sep(kHz) Sideband
1 1 8.43510000 50000.0039 50000.0039 1
2 8.48510000 50000.0039 50000.0039 1
AIPS 1: Resumes
>
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