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Document RM3 PTO extension extrapolation diagnostic - #277

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cmccomb merged 1 commit into
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codex/rm3-pto-extension-extrapolation-note
Oct 13, 2026
Merged

cmccomb merged 1 commit into
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codex/rm3-pto-extension-extrapolation-note

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@cmccomb cmccomb commented Oct 13, 2026

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Summary

Document a diagnostic comparison of the RM3 PTO-extension float and spar free decays using the pinned BEMIO HDF5 and completed four-step MATLAB source artifact.

At common 0.025 s times, linear two-step extrapolation reduces the source/Python heave difference to 0.256 mm for the float and 0.0065 mm for the spar. Startup speed differences remain, so this does not change either published-case status or the physical solver.

Verification

  • Recomputed both independent Python 0.025 and 0.0125 s trajectories against the downloaded pinned MATLAB source artifact and source-matched HDF5.
  • git diff --check passed.

@cmccomb
cmccomb merged commit 6f21010 into master Oct 13, 2026
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cmccomb deleted the codex/rm3-pto-extension-extrapolation-note branch October 13, 2026 00:41
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