[daip] CALIB failure (31DEC03 AIPS on DEC ALPHA) w/ basic settings
Daniel Lebach
dlebach at cfa.harvard.edu
Wed Jun 9 15:49:59 EDT 2004
Hello,
I have been running CALIB for years w/o troubles, but now I can't
seem to get anything out but an SN table of null solutions (i.e., all
phases are 'INDE' and all delays and rates are 0.0). My troubles are
with 31DEC03 AIPS and I think the latest 31DEC04 AIPS on our system.
I am running AIPS on a DEC ALPHA. Perhaps I just have some incorrect
adverb setting, but if so, I can't find it. My troubles exist for
multiple UV data sets, including at least one for which I ran CALIB
successfully with (I think) the same adverb settings under 31DEC03
AIPS about a year ago. I have tried changing numerous adverb
settings w/o success. Here are my default settings (31DEC03 AIPS):
>inp
AIPS 1: CALIB: Task to determine calibration for data.
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: Input uv data.
AIPS 1: INNAME 'BR080B ' UV file name (name)
AIPS 1: INCLASS 'UVCOP ' UV file name (class)
AIPS 1: INSEQ 2 UV file name (seq. #)
AIPS 1: INDISK 5 UV file disk drive #
AIPS 1: Data selection (multisource):
AIPS 1: CALSOUR 'HR8703 ' Calibrator sources
AIPS 1: *rest ' '
AIPS 1: QUAL -1 Calibrator qualifier -1=>all
AIPS 1: CALCODE ' ' Calibrator code ' '=>all
AIPS 1: SELBAND -1 Bandwidth to select (kHz)
AIPS 1: SELFREQ -1 Frequency to select (MHz)
AIPS 1: FREQID -1 Freq. ID to select.
AIPS 1: TIMERANG *all 0 Time range to use.
AIPS 1: BCHAN 0 Lowest channel number 0=>all
AIPS 1: ECHAN 16 Highest channel number
AIPS 1: ANTENNAS 1 2 Antennas to select. 0=all
AIPS 1: *rest 0
AIPS 1: ** press RETURN for more, enter Q or next line to quit print **
#
AIPS 1: DOFIT *all 0 Subset of ANTENNAS list for
AIPS 1: which solns are desired. 0
AIPS 1: => all in ANTENNAS, < 0 all
AIPS 1: but those in DOFIT
AIPS 1: ANTUSE *all 0 Mean gain is calculated
AIPS 1: (CPARM(2)>0) using only the
AIPS 1: listed antennas. See explain.
AIPS 1: SUBARRAY 0 Subarray, 0=>all
AIPS 1: UVRANGE 0 0 Range of uv distance for full
AIPS 1: weight
AIPS 1: WTUV 0 Weight outside UVRANGE 0=0.
AIPS 1:
AIPS 1: Cal. info for input:
AIPS 1: DOCALIB 1 If >0 calibrate data
AIPS 1: = 2 calibrate weights
AIPS 1: GAINUSE 9 CL table to apply.
AIPS 1: DOPOL -1 If >0 correct polarization.
AIPS 1: BLVER -1 BL table to apply.
AIPS 1: FLAGVER 1 Flag table version
AIPS 1: DOBAND 1 If >0 apply bandpass cal.
AIPS 1: Method used depends on value
AIPS 1: ** press RETURN for more, enter Q or next line to quit print **
#
AIPS 1: of DOBAND (see HELP file).
AIPS 1: BPVER 1 Bandpass table version
AIPS 1: SMOOTH *all 0 Smoothing function. See
AIPS 1: HELP SMOOTH for details.
AIPS 1:
AIPS 1: CLEAN map. See HELP.
AIPS 1: IN2NAME ' ' Cleaned map name (name)
AIPS 1: IN2CLASS ' ' Cleaned map name (class)
AIPS 1: IN2SEQ 0 Cleaned map name (seq. #)
AIPS 1: IN2DISK 0 Cleaned map disk unit #
AIPS 1: INVERS 0 CC file version #.
AIPS 1: NCOMP *all 0 # comps to use for model.
AIPS 1: 1 value per field
AIPS 1: FLUX 0 Lowest CC component used.
AIPS 1: NMAPS 0 No. Clean map files
AIPS 1: CMETHOD 'DFT ' Modeling method:
AIPS 1: 'DFT','GRID',' '
AIPS 1: CMODEL ' ' Model type: 'COMP','IMAG'
AIPS 1: SMODEL *all 0 Source model, 1=flux,2=x,3=y
AIPS 1: See HELP SMODEL for models.
AIPS 1:
AIPS 1: ** press RETURN for more, enter Q or next line to quit print **
#
AIPS 1: Output uv data file.
AIPS 1: OUTNAME ' ' UV file name (name)
AIPS 1: OUTCLASS ' ' UV file name (class)
AIPS 1: OUTSEQ 0 UV file name (seq. #)
AIPS 1: OUTDISK 0 UV file disk drive #
AIPS 1:
AIPS 1: Solution control adverbs:
AIPS 1: REFANT 1 Reference antenna
AIPS 1: SOLINT 0 Solution interval (min)
AIPS 1: APARM 2 0 General parameters
AIPS 1: 0 0 1=min. no. antennas
AIPS 1: 1 0 2 > 0 => data divided
AIPS 1: 0.01 *rest 0 3 > 0 => avg. RR,LL
AIPS 1: 5 > 0 => avg. IFs.
AIPS 1: 6=print level, 1=good,
AIPS 1: 2 closure, 3 SNR
AIPS 1: 7=SNR cutoff (0=>5)
AIPS 1: 8=max. ant. # (no AN)
AIPS 1: 9 > 0 => pass failed soln
AIPS 1: Phase-amplitude Parameters:
AIPS 1: SOLTYPE ' ' Soln type,' ','L1','GCON'
AIPS 1: ** press RETURN for more, enter Q or next line to quit print **
#
AIPS 1: SOLMODE 'P ' Soln. mode: 'A&P','P','P!A',
AIPS 1: 'GCON'
AIPS 1: SOLCON 0 Gain constraint factor.
AIPS 1: MINAMPER 0 Amplitude closure error
AIPS 1: regarded as excessive in %
AIPS 1: MINPHSER 0 Phase closure error regarded
AIPS 1: as excessive in degrees
AIPS 1: CPARM *all 0 Phase-amp. parameters
AIPS 1: 1 = Min el for gain
AIPS 1: normalization (deg)
AIPS 1: 2 >0 => normalize gain
AIPS 1: 3 avg. amp. closure err
AIPS 1: 4 avg. ph. closure err
AIPS 1: 5 >0 => scalar average
AIPS 1:
AIPS 1: SNVER 9 Output SN table, 0=>new table
AIPS 1: ANTWT *all 0 Ant. weights (0=>1.0)
AIPS 1: GAINERR *all 0 Std. Dev. of antenna gains.
AIPS 1: BADDISK 0 0 Disk no. not to use for
AIPS 1: 1 2 scratch files.
AIPS 1: *rest 0
>
> go calib
CALIB1: Task CALIB (release of 31DEC03) begins
CALIB1: CALIB USING BR080B . UVCOP . 2 DISK= 5 USID=2101
CALIB1: Selecting, editing and calibrating the data
CALIB1: Doing cal transfer mode with point model for each source
CALIB1: This is not self-calibration
CALIB1: Dividing data by source flux densities
CALIB1: Determining solutions
CALIB1: Writing SN table 9
CALIB1: Found 246 good solutions
CALIB1: Failed on 287 solutions
CALIB1: 123 solutions had insufficient data
CALIB1: Appears to have ended successfully
CALIB1: rgalp7 31DEC03 NEW: Cpu= 6.1 Real= 125 IO= 206303
AIPS 1: Resumes
In all test cases the number of reported failed solutions is a bit
greater than the number of good solutions. In principle there should
be few if any failed solutions. Despite the fact that good solutions
do exist, the entire output SN table is null (as described above).
Can anybody tell me what's going on? Again, as best as I can tell,
my adverb settings are identical to those I used for a successful run
of CALIB on this exact data set last year.
Thanks,
Dan Lebach
P.S. If need be, tests I've run with FRING suggest that I can
probably use FRING to get solutions similar to what I am trying to
obtain with CALIB. Even so, I would like to understand why CALIB no
longer works for me.
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