This task performs a preliminary bandpass solution and applies it, then computes the flagging heuristics by calling hif_correctedampflag which looks for outlier visibility points by statistically examining the scalar difference of the corrected amplitude minus model amplitudes, flags those outliers, then derives a final bandpass solution (if any flags were generated). The philosophy is that only outlier data points that have remained outliers after calibration will be flagged. Note that the phase of the data is not assessed.
In further detail, the workflow is as follows: an a priori calibration is applied using pre-existing caltables in the calibration state, a preliminary bandpass solution and amplitude gaincal solution is solved and applied, the flagging heuristics are run and any outliers are flagged, a final bandpass solution is solved (if necessary) and the name "final" is appended to this caltable. Plots are generated at two points in this workflow: after bandpass calibration but before flagging heuristics are run, and after flagging heuristics have been run and applied. If no points were flagged, the "after" plots are not generated or displayed. The score for this stage is a simple combination (multiplication) of the standard data flagging score (depending on the fraction of data flagged) and the score for the bandpass solution.
Measurement Set | Flagging Commands | Number of Statements |
---|---|---|
uid___A002_Xe20b32_X84e7.ms | uid___A002_Xe20b32_X84e7.ms-flag_commands.txt | 0 |
Data Selection | flagged before | flagged after |
---|---|---|
TOTAL | 35.9% | 35.9% |
BANDPASS | 20.3% | 20.3% |
AMPLITUDE | 20.3% | 20.3% |
PHASE | 20.2% | 20.2% |
TARGET | 20.2% | 20.2% |
Measurement Set | Phase-up Solution Parameters | ||||
---|---|---|---|---|---|
Type | Interval | Min Baselines per Antenna | Min SNR | Phase-up Bandwidth | |
uid___A002_Xe20b32_X84e7.ms | Phase only | Per integration (10.08s) | 4 | 3.0 |
Measurement Set | Solution Parameters | Applied To | Calibration Table | ||
---|---|---|---|---|---|
Type | Interval | Scan Intent | Spectral Windows | ||
uid___A002_Xe20b32_X84e7.ms | Channel | inf,7.812500MHz(16.0ch) | ALL | 16 | uid___A002_Xe20b32_X84e7.ms.hifa_bandpassflag.s12_2.spw16_18_20_22.channel.solintinf.bcal.final.tbl |
inf,3.906250MHz(8.0ch) | 18 | ||||
inf,7.812500MHz(64.0ch) | 20 | ||||
22 |
Plots show the bandpass correction applied to the target source. The first two plots show amplitude vs frequency; one for the reference antenna and one for a typical antenna, identified the antenna with mode score. The third plot shows phase vs frequency for the typical antenna.
Click the summary plots to enlarge them, or the plot title to see see detailed plots per spectral window and antenna.
The plots below show amplitude vs frequency for the bandpass correction, overlayed for all spectral windows and correlations. Click on the link above to show show detailed plots for all antennas, or on the links below to show plots with specific antennas preselected.
Amplitude vs frequency for the reference antenna (CM10). Click the link above to show detailed plots for CM10.
Amplitude vs frequency for a typical antenna (CM01). Click the link above to show detailed plots for CM01.
NB. random antenna until scores are working
The plot below shows phase vs frequency for the bandpass correction, overlayed for all spectral windows and correlations. Click on the link above to show show phase vs frequency plots for all antennas, or on the link for just the typical antenna.
Phase vs frequency for a typical antenna (CM01). Click the link above to show detailed plots for CM01.
These plots show amplitude vs time for two cases: 1, the calibrated data before application of any flags; and 2, where flagging was applied, the calibrated data after application of flags.
Data are plotted for all antennas and correlations, with different correlations shown in different colours.
These plots show amplitude vs UV distance for two cases: 1, the calibrated data before application of any flags; and 2, where flagging was applied, the calibrated data after application of flags.
Data are plotted for all antennas and correlations, with different correlations shown in different colours.
Score | Reason |
---|---|
1.00 | Combined score for uid___A002_Xe20b32_X84e7.ms: multiplication of flagging score 1.00 and bandpass score 1.00. |
1.00 | Lowest score for amplitude SNR is 1.00 (uid___A002_Xe20b32_X84e7.ms unknown origin) |
1.00 | Lowest score for phase derivative is 1.00 (uid___A002_Xe20b32_X84e7.ms unknown origin) |
1.00 | 0.00% of unflagged data with intent BANDPASS in uid___A002_Xe20b32_X84e7.ms was newly flagged. |