[daip] CALIB and DOFIT
Amy Mioduszewski
amiodusz at aoc.nrao.edu
Fri Apr 2 19:17:44 EST 2004
Hi all,
I think I have found a bug in CALIB if DOFIT it set. If I set
DOFIT to all but one antenna, then suddenly the number of good
solutions goes down dramatically. But if I set DOFIT to one
antenna the number of good solutions goes back up.
Example:
DOFIT 0
CALIB4: Task CALIB (release of 31DEC04) begins
CALIB4: CALIB USING SS433 A L . IF 4 . 2 DISK= 1 USID= 13
CALIB4: Create SS433 A L .CALIB . 41 (UV) on disk 2 cno 155
CALIB4: Selecting the data
CALIB4: Doing self-cal mode with CC model
CALIB4: FACSET: 0.556362 Jy found from 500 components
CALIB4: Divide data by model - first compute model by summing
CALIB4: UVPREP: Maximum U Baseline is 4.754E+07 lambda.
CALIB4: ALGSTB: All 484 Rows In AP (Max 1035)
CALIB4: ALGSTB: Ipol gridded model subtraction, chans 1 through 1
CALIB4: ALGSTB: Pass 1; 473- 0 Cells, with 32926 Pts
CALIB4: Field 1 used 500 CCs
CALIB4: Determining solutions
CALIB4: Writing SN table 14
CALIB4: Found 83 good solutions
CALIB4: Failed on 5 solutions
CALIB4: 6 solutions had insufficient data
CALIB4: Adjusting solutions to a common reference antenna
CALIB4: Applying solutions to data
CALIB4: Previously flagged Flagged by gain Kept
CALIB4: Partially 6039 446 2482
CALIB4: Fully 0 4003 26496
CALIB4: Copied OB file from vol/cno/vers 1 202 1 to 2 155 1
CALIB4: Copied AN file from vol/cno/vers 1 202 1 to 2 155 1
CALIB4: Copied WX file from vol/cno/vers 1 202 1 to 2 155 1
DOFIT 1 2 3 4 5 6 7 8 9 (10 is missing)
CALIB4: Task CALIB (release of 31DEC04) begins
CALIB4: CALIB USING SS433 A L . IF 4 . 2 DISK= 1 USID= 13
CALIB4: Create SS433 A L .CALIB . 42 (UV) on disk 2 cno 156
CALIB4: Selecting the data
CALIB4: Doing self-cal mode with CC model
CALIB4: FACSET: 0.556362 Jy found from 500 components
CALIB4: Divide data by model - first compute model by summing
CALIB4: UVPREP: Maximum U Baseline is 4.754E+07 lambda.
CALIB4: ALGSTB: All 484 Rows In AP (Max 1035)
CALIB4: ALGSTB: Ipol gridded model subtraction, chans 1 through 1
CALIB4: ALGSTB: Pass 1; 473- 0 Cells, with 32926 Pts
CALIB4: Field 1 used 500 CCs
CALIB4: Determining solutions
CALIB4: Writing SN table 15
CALIB4: Found 38 good solutions
CALIB4: Failed on 52 solutions
CALIB4: 4 solutions had insufficient data
CALIB4: Adjusting solutions to a common reference antenna
CALIB4: CALREF: CANNOT RELATE ANTENNA 10 TO 9 IN SUBARRAY 1
CALIB4: Some solutions were not adjusted to the common
CALIB4: reference antenna. This may be because one or more
CALIB4: antennas were not used. Check your data before
CALIB4: proceeding.
CALIB4: Applying solutions to data
CALIB4: Previously flagged Flagged by gain Kept
CALIB4: Partially 6039 9656 8467
CALIB4: Fully 0 12191 11040
DOFIT 1 0
CALIB4: Task CALIB (release of 31DEC04) begins
CALIB4: CALIB USING SS433 A L . IF 4 . 2 DISK= 1 USID= 13
CALIB4: Create SS433 A L .CALIB . 43 (UV) on disk 2 cno 157
CALIB4: Selecting the data
CALIB4: Doing self-cal mode with CC model
CALIB4: FACSET: 0.556362 Jy found from 500 components
CALIB4: Divide data by model - first compute model by summing
AIPS 4: Resumes
>CALIB4: UVPREP: Maximum U Baseline is 4.754E+07 lambda.
CALIB4: ALGSTB: All 484 Rows In AP (Max 1035)
CALIB4: ALGSTB: Ipol gridded model subtraction, chans 1 through 1
CALIB4: ALGSTB: Pass 1; 473- 0 Cells, with 32926 Pts
CALIB4: Field 1 used 500 CCs
CALIB4: Determining solutions
CALIB4: Writing SN table 16
CALIB4: Found 91 good solutions
CALIB4: Failed on 2 solutions
CALIB4: 1 solutions had insufficient data
CALIB4: Adjusting solutions to a common reference antenna
CALIB4: Applying solutions to data
CALIB4: Previously flagged Flagged by gain Kept
CALIB4: Partially 6039 0 6039
CALIB4: Fully 0 0 26942
Here are my inputs
AIPS 4: CALIB: Task to determine calibration for data.
AIPS 4: Adverbs Values Comments
AIPS 4: ----------------------------------------------------------------
AIPS 4: Input uv data.
AIPS 4: INNAME 'SS433 A L ' UV file name (name)
AIPS 4: INCLASS 'IF 4 ' UV file name (class)
AIPS 4: INSEQ 2 UV file name (seq. #)
AIPS 4: INDISK 1 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 1 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 1 *rest 0 Subset of ANTENNAS list for
AIPS 4: which solns are desired. 0
AIPS 4: => all in ANTENNAS, < 0 all
AIPS 4: but those in DOFIT
AIPS 4: ANTUSE *all 0 Mean gain is calculated
AIPS 4: (CPARM(2)>0) using only the
AIPS 4: listed antennas. See explain.
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 0 CL table to apply.
AIPS 4: DOPOL -1 If >0 correct polarization.
AIPS 4: BLVER -1 BL 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 0 Bandpass table version
AIPS 4: SMOOTH *all 0 Smoothing function. See
AIPS 4: HELP SMOOTH for details.
AIPS 4:
AIPS 4: CLEAN map. See HELP.
AIPS 4: IN2NAME 'SS433 A IF4 ' Cleaned map name (name)
AIPS 4: IN2CLASS 'ICL001' Cleaned map name (class)
AIPS 4: IN2SEQ 15 Cleaned map name (seq. #)
AIPS 4: IN2DISK 1 Cleaned map disk unit #
AIPS 4: INVERS 0 CC file version #.
AIPS 4: NCOMP 500 *rest 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: CMODEL ' ' Model type: 'COMP','IMAG'
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 2 UV file disk drive #
AIPS 4:
AIPS 4: Solution control adverbs:
AIPS 4: REFANT 0 Reference antenna
AIPS 4: SOLINT 30 Solution interval (min)
AIPS 4: SOLSUB 0 Solution subinterval
AIPS 4: SOLMIN 0 Min solution interval
AIPS 4: APARM 0 0 General parameters
AIPS 4: 0 0 1=min. no. antennas
AIPS 4: 0 0 2 > 0 => data divided
AIPS 4: 4 *rest 0 3 > 0 => avg. RR,LL
AIPS 4: 5 > 0 => avg. IFs.
AIPS 4: 6=print level, 1=good,
AIPS 4: 2 closure, 3 SNR
AIPS 4: 7=SNR cutoff (0=>5)
AIPS 4: 8=max. ant. # (no AN)
AIPS 4: 9 > 0 => pass failed soln
AIPS 4: Phase-amplitude Parameters:
AIPS 4: SOLTYPE ' ' Soln type,' ','L1','GCON'
AIPS 4: SOLMODE 'A&P ' Soln. mode: 'A&P','P','P!A',
AIPS 4: 'GCON'
AIPS 4: SOLCON 0 Gain constraint factor.
AIPS 4: MINAMPER 0 Amplitude closure error
AIPS 4: regarded as excessive in %
AIPS 4: MINPHSER 0 Phase closure error regarded
AIPS 4: as excessive in degrees
AIPS 4: CPARM *all 0 Phase-amp. parameters
AIPS 4: 1 = Min el for gain
AIPS 4: normalization (deg)
AIPS 4: 2 >0 => normalize gain
AIPS 4: 3 avg. amp. closure err
AIPS 4: 4 avg. ph. closure err
AIPS 4: 5 >0 => scalar average
AIPS 4:
AIPS 4: SNVER 0 Output SN table, 0=>new table
AIPS 4: ANTWT *all 0 Ant. weights (0=>1.0)
AIPS 4: GAINERR *all 0 Std. Dev. of antenna gains.
AIPS 4: BADDISK *all 0 Disk no. not to use for
AIPS 4: scratch files.
I'll look at this on Monday if no-one works on it over the weekend.
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