search

HERA-Team / hera_notebook_templates

Repository for HERA analysis / real-time pipeline notebooks and related support code
MIT License
0 stars 0 forks source link

Add xtalk error calculation #56

Closed mwilensky768 closed 2 weeks ago

mwilensky768 commented 2 weeks ago

This adds the cross talk filter to the noise covariance calculation (and corresponding correction factors). It turned out to involve a sizable matrix multiply that made the calculation take 15 minutes without any adjustments.

I tried different speedup schemes to ameliorate this including generating one filtration operator per spectral window, only using one of the streams, and decimating in frequency. I found that decimating in frequency by a factor of 10 improves the speed by an order of magnitude (just under two minutes to complete) with an error compared to the full calculation of one part in 10^4 at worst on the couple baselines that I checked.

This option is adjusted with the CORR_MATRIX_FREQ_DECIMATION global, defaulted to 10.

review-notebook-app[bot] commented 2 weeks ago

Check out this pull request on  ReviewNB

See visual diffs & provide feedback on Jupyter Notebooks.

Powered by ReviewNB