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[CALIBRATE\]APPLY [AMPLI|DELAY|PHASE [Gain]] /FLAG [Threshold]
Apply gain solution (in AMPLITUDE, DELAY or PHASE) and flag data without a corresponding valid gain solution.
If the Threshold argument is present, all data with a correction exceeding that threshold are also flagged. This can be useful to filter out antennas that have unstable gains. A threshold of 90 degrees in phase, or 1.3 in amplitude may be appropriate.
The optional Gain argument has no effect on the Threshold: it is always the gain value in the CGAINS array that is compared to the Threshold.
USEFUL TRICK: If you forgot to flag the data while applying the self-calibration gain solution, you can still do it a posteriori without changing the amplitude and/or phase by using command APPLY MODE 0 /FLAG Threshold where MODE is any of AMPLI, DELAY or PHASE.