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CASACalibrationExample
(2011-09-07,
ToddHunter
)
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Comparison of calibration techniques in the presence of rapidly-varying atmospheric phase
Dataset
EVLA BnA-configuration continuum dataset
Date = May 29, 2011
Frequency = 19-21 GHz (1.5 cm)
16 subbands of 128 MHz bandwidth each
beamsize~0.3", baselines 14-1400 kilolambda
similar to ALMA ES extended at Band 9
zenith opacity ~ 0.03
elevation of target ~ 20 deg, so tau ~ 0.09
phase calibrator flux density ~ 1.7 Jy
flux calibrator flux density ~ 3 Jy
rms phase on phase calibrator in 2 second integrations after calibration = 9 degrees
Raw data for spw01 RR (19.2 GHz) on a typical long baseline (ea20&ea01)
Raw phase on the calibrators
Zoom to 1 minute on phase calibrator
Comparison of corrected data (all baselines)
Plots are on identical scale!
Data
Integration-based phase calibration solution applied
Scan-based phase calibration solution applied
amplitude
vs.
time
phase
vs.
time
rms phase
8.9 degrees
20.8 degrees
amplitude
vs.
uvdist
phase
vs.
uvdist
Comparison of corrected data (baseline ea01&ea20 only)
amplitude
vs.
time
phase
vs.
time
rms phase
10.4 degrees
19.7 degrees
Return to
Data reduction workshop
--
ToddHunter
- 2011-09-06
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png
uncalibrated_phase_vs_time_spw1_ea20ea01.png
manage
24 K
2011-09-07 - 10:47
ToddHunter
uncalibrated phase vs. time (full track)
png
uncalibrated_spw1.png
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17 K
2011-09-07 - 10:33
ToddHunter
uncalibrated amplitude vs. time (integration-based phase)
png
K_BnA_cont_multi.ms.png
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39 K
2011-09-07 - 10:39
ToddHunter
plotants
png
intbased_spw1.png
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16 K
2011-09-07 - 10:30
ToddHunter
calibrated amplitude vs. time (integration-based phase)
png
intbased_phase_spw1_ea01ea20.png
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17 K
2011-09-07 - 12:07
ToddHunter
png
intbased_phase_vs_time_spw1.png
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16 K
2011-09-07 - 11:28
ToddHunter
png
intbased_spw1_amp_uvdist.png
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14 K
2011-09-07 - 15:00
ToddHunter
png
intbased_spw1_ea01ea20.png
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15 K
2011-09-07 - 12:16
ToddHunter
png
intbased_spw1_fixedscale.png
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14 K
2011-09-07 - 11:43
ToddHunter
png
intbased_spw1_phase_uvdist.png
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19 K
2011-09-07 - 15:15
ToddHunter
txt
reduce_Kband.py.txt
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6 K
2011-09-07 - 17:24
ToddHunter
txt
reduce_Kband_workshopdemo.py.txt
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6 K
2011-09-07 - 17:23
ToddHunter
png
scanbased_phase_spw1_ea01ea20.png
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19 K
2011-09-07 - 12:10
ToddHunter
png
scanbased_phase_vs_time_spw1.png
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18 K
2011-09-07 - 11:24
ToddHunter
png
scanbased_spw1.png
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15 K
2011-09-07 - 11:19
ToddHunter
png
scanbased_spw1_amp_uvdist.png
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17 K
2011-09-07 - 15:00
ToddHunter
png
scanbased_spw1_ea01ea20.png
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15 K
2011-09-07 - 12:16
ToddHunter
png
scanbased_spw1_phase_uvdist.png
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30 K
2011-09-07 - 15:15
ToddHunter
png
uncalibrated_phase_vs_time_spw1_ea20ea01_1minute.png
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14 K
2011-09-07 - 11:07
ToddHunter
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Topic revision: r4 - 2011-09-07,
ToddHunter
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