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desihub / nightwatch

DESI Nightwatch: online data quality assurance
BSD 3-Clause "New" or "Revised" License
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Show correlation coefficient or covariance of noise in overscan region #388

Open julienguy opened 9 months ago

julienguy commented 9 months ago

Once we have the correlation coefficient of the noise across ~10 pixels saved in the processed image headers (see https://github.com/desihub/desispec/issues/2173), it would be useful to display the results in nightwatch.

For instance, it's hard to tell whether the correlated noise in the following image is higher than usual or not: https://nightwatch.desi.lbl.gov/20240130/00222364/preproc-z9-00222364-4x.html

sybenzvi commented 9 months ago

Assuming the correlation coefficients are available at the per-amp level, we can add this information to the CCD QA plots after establishing typical ranges.

Is this something we want to show for any exposure, or just certain ones (like darks)?

julienguy commented 9 months ago

We could show it for each exposure