[daip] Possible problem with FRING
Alice Argon
alice at rgalp2.harvard.edu
Thu May 24 16:30:47 EDT 2001
On Thu, 24 May 2001, Amy Mioduszewski wrote:
> But that is a side issue. How exactly did you get to the point of CL/7? It
> does not seem to be corrected for the single band delays, which is why a
> multi-band delay does not improve things. If I run APARM(5)=2 using
> GAINUSE 8 (which has the single band corrections: APARM(5)=0) then things
> look fine.
>
Hi Amy,
We run FRING twice.
1. On a single scan for manual phase cal
FRING using CL=6 --> SN=4
CLCAL: SN=4 + CL=6 --> CL=7
2. On all scans, EITHER single-band OR multi-band
FRING using CL=7 --> SN=5
CLCAL: SN=5 + CL=7 --> CL=8
Try this experiment and maybe you'll see what I mean when I say that
multi-band does not work.
Start with CL=7 (manual phase cal applied) and do two independent runs:
1. single-band FRING using CL=7 --> SN=6 [in AIPS NEW]
CLCAL: SN=6 + CL=7 --> CL=9
2. multi-band FRING using CL=7 --> SN=7 [in AIPS TST]
CLCAL: SN=7 + CL=7 --> CL=10
Then look at both CL=9 and CL=10 w/ POSSM. Look in particular at antennas=4,0;
baseline=0. In CL=10 each band has a different slope and there are 10 degree
jumps between bands and 10 degree slopes across bands. CL=9, while not
perfect, does not display this behavior.
Below is a transcript of my session....
AIPS 5: Image=MULTI (UV) Filename=BM112C-SCAN .FITAB . 1
AIPS 5: Telescope=VLBA Receiver=VLBA
AIPS 5: Observer=BM112 User #= 479
AIPS 5: Observ. date=16-NOV-1998 Map date=24-MAY-2001
AIPS 5: # visibilities 1776 Sort order TB
AIPS 5: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN TIME1 BASELINE
AIPS 5: SOURCE FREQSEL INTTIM GATEID CORR-ID WEIGHT
AIPS 5: SCALE
AIPS 5: ----------------------------------------------------------------
AIPS 5: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 5: COMPLEX 1 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 5: STOKES 1 -1.0000000E+00 1.00 -1.0000000E+00 0.00
AIPS 5: FREQ 32 2.2192140E+10 0.53 5.0000000E+05 0.00
AIPS 5: IF 8 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 5: RA 1 00 00 00.000 1.00 3600.000 0.00
AIPS 5: DEC 1 00 00 00.000 1.00 3600.000 0.00
AIPS 5: ----------------------------------------------------------------
AIPS 5: Coordinate equinox 2000.00
AIPS 5: Maximum version number of extension files of type HI is 1
AIPS 5: Maximum version number of extension files of type FQ is 1
AIPS 5: Maximum version number of extension files of type CT is 1
AIPS 5: Maximum version number of extension files of type AT is 1
AIPS 5: Maximum version number of extension files of type AN is 1
AIPS 5: Maximum version number of extension files of type CL is 8
AIPS 5: Maximum version number of extension files of type GC is 1
AIPS 5: Maximum version number of extension files of type IM is 1
AIPS 5: Maximum version number of extension files of type MC is 1
AIPS 5: Maximum version number of extension files of type SN is 5
AIPS 5: Maximum version number of extension files of type SU is 1
AIPS 5: Maximum version number of extension files of type TY is 1
>
Single-band solutions..................
>
AIPS 5: FRING: Task to fringe fit data
AIPS 5: Adverbs Values Comments
AIPS 5: ----------------------------------------------------------------
AIPS 5: Input uv data.
AIPS 5: INNAME 'BM112C-SCAN ' UV file name (name)
AIPS 5: INCLASS 'FITAB ' UV file name (class)
AIPS 5: INSEQ 1 UV file name (seq. #)
AIPS 5: INDISK 5 UV file disk drive #
AIPS 5: Data selection (multisource):
AIPS 5: CALSOUR *all ' ' Calibrator sources
AIPS 5: QUAL -1 Calibrator qualifier -1=>all
AIPS 5: CALCODE ' ' Calibrator code ' '=>all
AIPS 5: SELBAND -1 Bandwidth to select (kHz)
AIPS 5: SELFREQ -1 Frequency to select (MHz)
AIPS 5: FREQID -1 Freq. ID to select.
AIPS 5: TIMERANG *all 0 Time range to use.
AIPS 5: BCHAN 0 Lowest channel number 0=>all
AIPS 5: ECHAN 0 Highest channel number
AIPS 5: ANTENNAS *all 0 Antennas to select. 0=all
AIPS 5: DOFIT *all 0 Subset of ANTENNAS list
AIPS 5: for which solns are desired.
AIPS 5: 0 => all in ANTENNAS
AIPS 5: < 0 => all not in DOFIT list
AIPS 5: SUBARRAY 0 Subarray, 0=>all
AIPS 5: UVRANGE 0 0 Range of uv distance for full
AIPS 5: weight
AIPS 5: WTUV 0 Weight outside UVRANGE 0=0.
AIPS 5:
AIPS 5: Cal. info for input:
AIPS 5: DOCALIB 1 If >0 calibrate data
AIPS 5: = 2 calibrate weights
AIPS 5: GAINUSE 7 CL table to apply.
AIPS 5: FLAGVER -1 Flag table version
AIPS 5: DOBAND -1 If >0 apply bandpass cal.
AIPS 5: Method used depends on value
AIPS 5: of DOBAND (see HELP file).
AIPS 5: BPVER -1 Bandpass table version
AIPS 5: SMOOTH *all 0 Smoothing function. See
AIPS 5: HELP SMOOTH for details.
AIPS 5:
AIPS 5: CLEAN map (optional)
AIPS 5: IN2NAME ' ' Cleaned map name (name)
AIPS 5: IN2CLASS ' ' Cleaned map name (class)
AIPS 5: IN2SEQ 0 Cleaned map name (seq. #)
AIPS 5: IN2DISK 0 Cleaned map disk unit #
AIPS 5: INVERS 0 CC file version #.
AIPS 5: NCOMP *all 0 # comps to use for model.
AIPS 5: 1 value per field
AIPS 5: FLUX 0 Lowest CC component used.
AIPS 5: NMAPS 0 No. Clean map files
AIPS 5: CMETHOD ' ' Modeling method:
AIPS 5: 'DFT','GRID',' '
AIPS 5: SMODEL *all 0 Source model, 1=flux,2=x,3=y
AIPS 5: See HELP SMODEL for models.
AIPS 5:
AIPS 5: Output uv data file.
AIPS 5: OUTNAME ' ' UV file name (name)
AIPS 5: OUTCLASS ' ' UV file name (class)
AIPS 5: OUTSEQ 0 UV file name (seq. #)
AIPS 5: OUTDISK 0 UV file disk drive #
AIPS 5:
AIPS 5: Solution control adverbs:
AIPS 5: REFANT 4 Reference antenna
AIPS 5: SEARCH 4 5 Prioritized reference antenna
AIPS 5: 9 *rest 0 list - supplements REFANT
AIPS 5: - but only if APARM(9)>0
AIPS 5: SOLINT 0 Solution interval (min)
AIPS 5: 0 => 10 min
AIPS 5:
AIPS 5: APARM 3 0 General parameters
AIPS 5: 0 0 1=min. no. antennas
AIPS 5: 0 0 2 > 0 => data divided
AIPS 5: 0 0 3 > 0 => avg. RR,LL
AIPS 5: 1 0 4 > 0 => avg. freq. in IFs
AIPS 5: 5 > 0 => combine IFs.
AIPS 5: 6=print level, 1=some
AIPS 5: 7=SNR cutoff (0=>5)
AIPS 5: 8=max. ant. # (no AN)
AIPS 5: 9 > 0 => do exhaustive
AIPS 5: baseline search
AIPS 5: DPARM 3 80 Delay-rate parameters
AIPS 5: 0 8 1=no. bl combo. (def=3)
AIPS 5: *rest 0 2=delay win (nsec), if <0
AIPS 5: no delay search done
AIPS 5: 3=rate win (mHz)
AIPS 5: 4=int. time (sec)
AIPS 5: 0 => min. found in data
AIPS 5: 5 >0 => don't do ls. soln
AIPS 5: 6 >0 => don't avg. in freq
AIPS 5: 7 >0 => don't rereference
AIPS 5: phase
AIPS 5: 8 > 0 => activate zero'ing
AIPS 5: options
AIPS 5: SNVER 6 Output SN table, 0=>new table
AIPS 5: ANTWT *all 0 Ant. weights (0=>1.0)
AIPS 5: BADDISK 1 *rest 0 Disk no. not to use for
AIPS 5: scratch files.
>
FRING5: Task FRING (release of 31DEC00) begins
FRING5: You are using a non-standard program
FRING5: ****** WARNING: NO NX TABLE IN MULTI-SOURCE FILE
FRING5: ****** SELECTION AND FLAGGING BY SOURCE DISABLED
FRING5: ****** YOU SHOULD RUN INDXR
FRING5: Selecting and calibrating the data
FRING5: ** WARNING - Subarray 1 contains VLBA data, but no CQ data
FRING5: ** to enable VLBA decorrelation corrections
FRING5: ** Type EXPLAIN FITLD for further information
FRING5: Dividing data by source flux densities
FRING5: Determining solutions
FRING5: Writing SN table 6
FRING5: FREQUENCIES DO NOT LIE ON A UNIFORM GRID.
FRING5: THIS MAY DEGRADE DETERMINATION OF DELAYS.
FRING5: Found 80 good solutions
FRING5: Appears to have ended successfully
FRING5: rgalp8 31DEC00 NEW: Cpu= 13.6 Real= 20 IO= 1730
>
AIPS 5: CLCAL Task to manage SN and CL calibration tables
AIPS 5: Adverbs Values Comments
AIPS 5: ----------------------------------------------------------------
AIPS 5: INNAME 'BM112C-SCAN ' Input UV file name (name)
AIPS 5: INCLASS 'FITAB ' Input UV file name (class)
AIPS 5: INSEQ 1 Input UV file name (seq. #)
AIPS 5: INDISK 5 Input UV file disk unit #
AIPS 5: SOURCES *all ' ' Source list to calibrate
AIPS 5: SOUCODE ' ' Source "Cal codes"
AIPS 5: CALSOUR *all ' ' Cal sources for calibration
AIPS 5: QUAL -1 Source qualifier -1=>all
AIPS 5: CALCODE ' ' Calibrator code ' '=>all
AIPS 5: TIMERANG *all 0 Time range to calibrate
AIPS 5: SUBARRAY 0 Subarray, 0=>all,
AIPS 5: ANTENNAS *all 0 Antennas selected, 0=> all
AIPS 5: SELBAND -1 Bandwidth to select (kHz)
AIPS 5: SELFREQ -1 Frequency to select (MHz)
AIPS 5: FREQID -1 Freq. ID to select.
AIPS 5: OPCODE ' ' Operation 'MERG','CALI',
AIPS 5: 'SMOO','CALP'; ' ' => 'CALI'
AIPS 5: INTERPOL 'AMBG' Interpolation function,
AIPS 5: choices are:
AIPS 5: '2PT','SIMP','AMBG','CUBE',
AIPS 5: 'SELF','POLY','MWF','BOX'
AIPS 5: see HELP for more details.
AIPS 5: INTPARM *all 0 Interpolation parameters
AIPS 5: CUTOFF 0 Interpolation limit in
AIPS 5: time (min); 0=> no limit.
AIPS 5: SMOTYPE ' ' Data to smooth
AIPS 5: SNVER 6 Input SN table, 0=>all.
AIPS 5: GAINVER 7 Input Cal table 0=>1
AIPS 5: GAINUSE 9 Output CAL table 0=>2
AIPS 5: REFANT 4 Reference antenna 0=>pick.
AIPS 5: BADDISK 1 *rest 0 Disks to avoid for scratch
>
CLCAL5: Task CLCAL (release of 31DEC00) begins
CLCAL5: You are using a non-standard program
CLCAL5: Using interpolation mode AMBG
CLCAL5: Processing SN table 6
CLCAL5: SN2CL: Applying SN tables to CL table 7, writing CL table 9
CLCAL5: Appears to have ended successfully
CLCAL5: rgalp8 31DEC00 NEW: Cpu= 0.2 Real= 2 IO= 258
>
Now for the multi-band.................
>
AIPS 4: FRING: Task to fringe fit data
AIPS 4: Adverbs Values Comments
AIPS 4: ----------------------------------------------------------------
AIPS 4: Input uv data.
AIPS 4: INNAME 'BM112C-SCAN ' UV file name (name)
AIPS 4: INCLASS 'FITAB ' UV file name (class)
AIPS 4: INSEQ 1 UV file name (seq. #)
AIPS 4: INDISK 5 UV file disk drive #
AIPS 4: Data selection (multisource):
AIPS 4: CALSOUR *all ' ' Calibrator sources
AIPS 4: QUAL -1 Calibrator qualifier -1=>all
AIPS 4: CALCODE ' ' Calibrator code ' '=>all
AIPS 4: SELBAND -1 Bandwidth to select (kHz)
AIPS 4: SELFREQ -1 Frequency to select (MHz)
AIPS 4: FREQID -1 Freq. ID to select.
AIPS 4: TIMERANG *all 0 Time range to use.
AIPS 4: BCHAN 0 Lowest channel number 0=>all
AIPS 4: ECHAN 0 Highest channel number
AIPS 4: ANTENNAS *all 0 Antennas to select. 0=all
AIPS 4: DOFIT *all 0 Subset of ANTENNAS list
AIPS 4: for which solns are desired.
AIPS 4: 0 => all in ANTENNAS
AIPS 4: < 0 => all not in DOFIT list
AIPS 4: SUBARRAY 0 Subarray, 0=>all
AIPS 4: UVRANGE 0 0 Range of uv distance for full
AIPS 4: weight
AIPS 4: WTUV 0 Weight outside UVRANGE 0=0.
AIPS 4:
AIPS 4: Cal. info for input:
AIPS 4: DOCALIB 1 If >0 calibrate data
AIPS 4: = 2 calibrate weights
AIPS 4: GAINUSE 7 CL table to apply.
AIPS 4: FLAGVER -1 Flag table version
AIPS 4: DOBAND -1 If >0 apply bandpass cal.
AIPS 4: Method used depends on value
AIPS 4: of DOBAND (see HELP file).
AIPS 4: BPVER -1 Bandpass table version
AIPS 4: SMOOTH *all 0 Smoothing function. See
AIPS 4: HELP SMOOTH for details.
AIPS 4:
AIPS 4: CLEAN map (optional)
AIPS 4: IN2NAME ' ' Cleaned map name (name)
AIPS 4: IN2CLASS ' ' Cleaned map name (class)
AIPS 4: IN2SEQ 0 Cleaned map name (seq. #)
AIPS 4: IN2DISK 0 Cleaned map disk unit #
AIPS 4: INVERS 0 CC file version #.
AIPS 4: NCOMP *all 0 # comps to use for model.
AIPS 4: 1 value per field
AIPS 4: FLUX 0 Lowest CC component used.
AIPS 4: NMAPS 0 No. Clean map files
AIPS 4: CMETHOD ' ' Modeling method:
AIPS 4: 'DFT','GRID',' '
AIPS 4: SMODEL *all 0 Source model, 1=flux,2=x,3=y
AIPS 4: See HELP SMODEL for models.
AIPS 4:
AIPS 4: Output uv data file.
AIPS 4: OUTNAME ' ' UV file name (name)
AIPS 4: OUTCLASS ' ' UV file name (class)
AIPS 4: OUTSEQ 0 UV file name (seq. #)
AIPS 4: OUTDISK 0 UV file disk drive #
AIPS 4:
AIPS 4: Solution control adverbs:
AIPS 4: REFANT 4 Reference antenna
AIPS 4: SEARCH 4 5 Prioritized reference antenna
AIPS 4: 9 *rest 0 list - supplements REFANT
AIPS 4: - but only if APARM(9)>0
AIPS 4: SOLINT 0 Solution interval (min)
AIPS 4: 0 => 10 min
AIPS 4:
AIPS 4: APARM 3 0 General parameters
AIPS 4: 0 0 1=min. no. antennas
AIPS 4: 2 0 2 > 0 => data divided
AIPS 4: 0 0 3 > 0 => avg. RR,LL
AIPS 4: 1 0 4 > 0 => avg. freq. in IFs
AIPS 4: 5 > 0 => combine IFs.
AIPS 4: 6=print level, 1=some
AIPS 4: 7=SNR cutoff (0=>5)
AIPS 4: 8=max. ant. # (no AN)
AIPS 4: 9 > 0 => do exhaustive
AIPS 4: baseline search
AIPS 4: DPARM 3 80 Delay-rate parameters
AIPS 4: 0 8 1=no. bl combo. (def=3)
AIPS 4: *rest 0 2=delay win (nsec), if <0
AIPS 4: no delay search done
AIPS 4: 3=rate win (mHz)
AIPS 4: 4=int. time (sec)
AIPS 4: 0 => min. found in data
AIPS 4: 5 >0 => don't do ls. soln
AIPS 4: 6 >0 => don't avg. in freq
AIPS 4: 7 >0 => don't rereference
AIPS 4: phase
AIPS 4: 8 > 0 => activate zero'ing
AIPS 4: options
AIPS 4: SNVER 7 Output SN table, 0=>new table
AIPS 4: ANTWT *all 0 Ant. weights (0=>1.0)
AIPS 4: BADDISK 1 *rest 0 Disk no. not to use for
AIPS 4: scratch files.
>
FRING4: Task FRING (release of 31DEC01) begins
FRING4: You are using a non-standard program
FRING4: Selecting and calibrating the data
FRING4: ** WARNING - Subarray 1 contains VLBA data, but no CQ data
FRING4: ** to enable VLBA decorrelation corrections
FRING4: ** Type EXPLAIN FITLD for further information
FRING4: Dividing data by source flux densities
FRING4: Determining solutions
FRING4: Doing Least Squares fits for multi and single band delays
FRING4: Writing SN table 7
FRING4: FREQUENCIES DO NOT LIE ON A UNIFORM GRID.
FRING4: THIS MAY DEGRADE DETERMINATION OF DELAYS.
FRING4: Found 80 good solutions
FRING4: Appears to have ended successfully
FRING4: rgalp8 31DEC01 TST: Cpu= 24.7 Real= 37 IO= 1402
>
AIPS 4: CLCAL Task to manage SN and CL calibration tables
AIPS 4: Adverbs Values Comments
AIPS 4: ----------------------------------------------------------------
AIPS 4: INNAME 'BM112C-SCAN ' Input UV file name (name)
AIPS 4: INCLASS 'FITAB ' Input UV file name (class)
AIPS 4: INSEQ 1 Input UV file name (seq. #)
AIPS 4: INDISK 5 Input UV file disk unit #
AIPS 4: SOURCES *all ' ' Source list to calibrate
AIPS 4: SOUCODE ' ' Source "Cal codes"
AIPS 4: CALSOUR *all ' ' Cal sources for calibration
AIPS 4: QUAL -1 Source qualifier -1=>all
AIPS 4: CALCODE ' ' Calibrator code ' '=>all
AIPS 4: TIMERANG *all 0 Time range to calibrate
AIPS 4: SUBARRAY 0 Subarray, 0=>all,
AIPS 4: ANTENNAS *all 0 Antennas selected, 0=> all
AIPS 4: SELBAND -1 Bandwidth to select (kHz)
AIPS 4: SELFREQ -1 Frequency to select (MHz)
AIPS 4: FREQID -1 Freq. ID to select.
AIPS 4: OPCODE ' ' Operation 'MERG','CALI',
AIPS 4: 'SMOO','CALP'; ' ' => 'CALI'
AIPS 4: INTERPOL 'AMBG' Interpolation function,
AIPS 4: choices are:
AIPS 4: '2PT','SIMP','AMBG','CUBE',
AIPS 4: 'SELF','POLY','MWF','BOX'
AIPS 4: see HELP for more details.
AIPS 4: INTPARM *all 0 Interpolation parameters
AIPS 4: CUTOFF 0 Interpolation limit in
AIPS 4: time (min); 0=> no limit.
AIPS 4: SMOTYPE ' ' Data to smooth
AIPS 4: SNVER 7 Input SN table, 0=>all.
AIPS 4: GAINVER 7 Input Cal table 0=>1
AIPS 4: GAINUSE 10 Output CAL table 0=>2
AIPS 4: REFANT 4 Reference antenna 0=>pick.
AIPS 4: BADDISK 1 *rest 0 Disks to avoid for scratch
>
CLCAL4: Task CLCAL (release of 31DEC01) begins
CLCAL4: You are using a non-standard program
CLCAL4: Using interpolation mode AMBG
CLCAL4: Processing SN table 7
CLCAL4: SN2CL: Applying SN tables to CL table 7, writing CL table 10
CLCAL4: Appears to have ended successfully
CLCAL4: rgalp8 31DEC01 TST: Cpu= 0.2 Real= 1 IO= 197
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