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@mmccrackan mmccrackan commented Dec 22, 2025

While investigating compressing the preprocessing data in #1348, I found that the PSDs in the saved preprocess axis managers take up the vast majority of the space (~71 MB each for SAT ISO v3 data). We moved the PSD calculations into calc_and_save in #1041 to improve preprocessing's performance, but this seems like it is probably not worth it especially since we now running things in large parallel jobs and are more concerned about space. This should make the uncompressed files go down from 250 MB for one obs_id, wafer, and band to something like 40 MB.

Tested by running preprocessing with SATp3 ISO v3 init config and loading it back. Will break existing preprocessing configuration files.

@mmccrackan mmccrackan requested a review from msilvafe January 2, 2026 15:11
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