This task performs a preliminary phased-up bandpass solution and temporarily 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, and then flags those outliers. 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.
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.
Measurement Set | Flagging Commands | Number of Statements |
---|---|---|
uid___A002_Xeea188_X1f88.ms | uid___A002_Xeea188_X1f88.ms-flag_commands.txt | 8 |
Data Selection | flagged before | flagged after |
---|---|---|
TOTAL | 42.223% | 42.463% |
BANDPASS | 26.752% | 28.979% |
AMPLITUDE | 26.752% | 28.979% |
PHASE | 25.336% | 25.336% |
TARGET | 25.343% | 25.343% |
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.