feat(flagging): mask rfi based on delay filtered visibilities

radiocosmology / draco

A pipeline for the analysis and simulation of drift scan radio data

MIT License

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feat(flagging): mask rfi based on delay filtered visibilities #268

Closed ssiegelx closed 5 months ago

ssiegelx commented 5 months ago

Adds three new tasks:

analysis.dayenu.DayenuDelayFilterFixedCutoff enables delay filtering of timeseries with rapidly changing frequency masks.
analysis.transform.ReduceChisq calculates a chi2-per-dof test statistic by comparing the delay filtered visibilities to the inverse noise variance stored in the weights.
analysis.flagging.RFIMaskChisqHighDelay generates a mask from this chi2-per-dof test statistic.

ssiegelx commented 5 months ago

Depends on #265 for the arPLS method.

ssiegelx commented 5 months ago

I've confirmed that using the updated DayenuDelayFilterFixedCutoff task yields the same result as previously obtained using the three separate tasks. If there are no objections I will go ahead and merge this PR and the corresponding one in ch_pipeline.

ljgray commented 5 months ago

I've confirmed that using the updated DayenuDelayFilterFixedCutoff task yields the same result as previously obtained using the three separate tasks. If there are no objections I will go ahead and merge this PR and the corresponding one in ch_pipeline.

Sounds good to me