Pipeline QA summary for this task.
Score Reason
1.00 The caltable file uid___A002_Xeea188_X1f88.ms.hifa_spwphaseup.s14_3.spw12_14_16_18.solintinf.gpcal.tbl for uid___A002_Xeea188_X1f88.ms was created
1.00 For uid___A002_Xeea188_X1f88.ms, field=J1851+0035 (intent=PHASE), SpW=12, the median achieved SNR (57.0) is > 75% of the phase SNR threshold (32.0). This SpW has one or more other SpWs mapped to it.
1.00 Excellent stability: The baseline-based median phase RMS for baselines longer than P80 is 14.62deg over the cycle time for uid___A002_Xeea188_X1f88.ms.

Contents

This task computes the spectral window map that will be used to apply the time gaincal phase solutions and the caltable containing per spw phase offsets.

Results

Phase solution spw map per measurement set. If a measurement set is listed with no further information, this indicates that there were no valid PHASE or CHECK fields for which to derive a SpW mapping (e.g. because those fields also covered other calibrator intents).
Measurement Set Field Intent Scan IDs Combine Spectral Window Map
uid___A002_Xeea188_X1f88.ms J1851+0035 (#2) PHASE 6, 15, 24, 33, 42, 51, 60, 70, 77 True 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 12, 15, 12, 17, 12
Estimated phase calibrator signal to noise ratios per measurement set. For spectral windows where the estimated SNR is below the specified threshold ('phasesnr' parameter), the SNR value is indicated in bold. If a measurement set is listed with no further information, this indicates that there were no valid PHASE or CHECK fields for which to derive a SpW mapping (e.g. because those fields also covered other calibrator intents).
Measurement Set Phase SNR threshold Field Intent Spectral Window Estimated SNR
uid___A002_Xeea188_X1f88.ms 32.0 J1851+0035 (#2) PHASE Combined (12, 14, 16, 18) 33.5
12 16.9
14 18.2
16 16.9
18 14.9
Mapping of phase calibrator fields to TARGET / CHECK fields.
Measurement Set Phase Field TARGET/CHECK Fields
uid___A002_Xeea188_X1f88.ms J1851+0035 (#2) Serpens_Main_850_00, Serpens_Main_850_01, Serpens_Main_850_02, Serpens_Main_850_03, Serpens_Main_850_08, Serpens_Main_850_09, Serpens_Main_850_10, Serpens_Main_850_11
Applied calibrations and parameters used for caltable generation
Measurement Set Solution Parameters Applied To Calibration Table
Type Interval Scan Intent Spectral Windows
uid___A002_Xeea188_X1f88.ms Phase only Infinite ALL 12, 14, 16, 18 uid___A002_Xeea188_X1f88.ms.hifa_spwphaseup.s14_3.spw12_14_16_18.solintinf.gpcal.tbl

Phase RMS structure plots

The pipeline uses the bandpass phase solutions to create structure functions plots, baseline length versus phase RMS. The measure of the phase RMS over a time interval equal to the phase referencing cycle-time is useful as a proxy for the expected residual phase RMS of a target source after phase referencing. The action of phase referencing itself is to correct phase fluctuations, caused by the atmosphere, on timescales longer than the cycle-time. The median phase RMS reported in the table is for the longest baselines of the array above the >80th percentile projected baseline (labeled "P80"). Previously flagged baseline(s)/antenna(s) are excluded and listed as 'flagged' in the log, while any antenna with noticeably elevated values as identified in this stage will be listed in the table as "Noisier antennas" and marked as 'outlier' in the log. For excellent stability conditions, phase RMS ( < 30 deg), the target images will have minimal decoherence. For stable conditions, phase RMS (30-50 deg), the target image can have slight decoherence which could be improved by self-calibration. When exceeding the phase RMS considered as stable conditions (50-70 deg), target images can suffer from significant decoherence up to 50%. Self-calibration can help improve the final products. In conditions exceeding the poor stability threshold, phase RMS (> 70 deg), target images are expected to be poor, suffer from extreme levels of decoherence and possibly have structure defects. Only self-calibration of known strong targets could recover these data. Self-calibration on bright enough targets may be able to mitigate the degradation caused by phase instability.

If the cycle time is longer than the total length of the bandpass scan, the phase RMS is only reported for the total time.

Measurement Set Type Time Median Phase RMS (deg) Noisier antennas
uid___A002_Xeea188_X1f88.ms Total Time 554.9 14.62 None
Cycle Time 585.6

uid___A002_Xeea188_X1f88.ms

Baseline length vs. Phase RMS

caltable
None
phasesnr
32.0
minblperant
4
calmode
ap
minsnr
3
antenna
 
solint
inf
field
J1924-2914
maxfracflagged
0.9
output_dir
 
refantmode
flex
uvrange
 
gaintype
G
append
False
bwedgefrac
0.03125
intent
BANDPASS
samebb
True
preavg
-1
spw
12,14,16,18
maxnarrowbw
300MHz
refant
CM02,CM10,CM03,CM05,CM08,CM12,CM11,CM07
selectdata
False
vis
uid___A002_Xeea188_X1f88.ms
hm_nantennas
all
opacity
 
hm_spwmapmode
auto
parang
False
scan
 
unregister_existing
False
minfracmaxbw
0.8
combine
 
solnorm
False
Start time
2023-05-05 21:07:37.513
End
2023-05-05 21:07:59.555
Duration
0:00:22.041
Context size
16.7 MiB
Note, WebLog generation is not included in the time.

CASA logs for stage 14