Fix 419

[d-chambers]

Description

This PR closes #419. Before the OptoDAS parser didn't account for spatial decimation, now it does.

Checklist

I have (if applicable):

• referenced the GitHub issue this PR closes.
• documented the new feature with docstrings or appropriate doc page.
• included a test. See testing guidelines.
• your name has been added to the contributors page (docs/contributors.md).
• added the "ready_for_review" tag once the PR is ready to be reviewed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.84%. Comparing base (fe417d6) to head (754e773).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #420   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files         112      112           
  Lines        8980     9021   +41     
=======================================
+ Hits         8966     9007   +41     
  Misses         14       14           

Flag	Coverage Δ
unittests	99.84% <100.00%> (+<0.01%)	⬆️

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