2026-10-07T00:11:46Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33979273 2026-09-24T04:30:18Z category_62 portal_316 item_type_3 month_year_09_2026

Supplementary file 1_Processing-induced uncertainty in MEMS-derived significant wave height estimates without attitude measurements.docx Johnson O. Oguntuase (25101712) Vishwamithra Sunkara (25101715) Stephan D. Howden (25101718) Marine Biology MEMS accelerometer ocean observation processing-induced uncertainty signal processing significant wave height spectral analysis wave buoy wave measurements Introduction<p>Significant wave height (SWH) derived from compact microelectromechanical systems (MEMS) is increasingly used for operational wave monitoring, but estimates can vary depending on the scientifically defensible processing choices applied to the same inertial record.</p>Methods<p>This study evaluates method-selection variability using a 31-day acceleration record from one operational buoy and one MEMS configuration for which attitude observations were unavailable. A common tilted-axis acceleration record was conditioned and processed through controlled spectral- and time-domain variants. Sensitivity was evaluated relative to a designated reference workflow, and the empirical between-method dispersion of a prescribed spectral ensemble was calculated for each observation epoch. The manufacturer’s time-aligned SWH product and a regional NDBC buoy were used only for contextual comparison, not as ground truth or for formal validation.</p>Results<p>For the investigated record, the prescribed ensemble produced a mean processing spread of 0.023 m, a median of 0.018 m, and a 95th percentile of 0.060 m; the corresponding 95th percentile relative spread was 6.42%. Among the tested configurations, modifications to time-domain stabilization produced larger reference-relative differences than substitution among the evaluated spectral estimators after common acceleration conditioning.</p>Discussion<p>These statistics quantify only the processing-method component of the prescribed ensemble and do not constitute a complete measurement-uncertainty budget. The numerical findings are specific to the investigated dataset, sensor configuration, processing choices, and sea states.</p> 2026-09-24T04:30:18Z Dataset Dataset 10.3389/fmars.2026.1952697.s001 https://figshare.com/articles/dataset/Supplementary_file_1_Processing-induced_uncertainty_in_MEMS-derived_significant_wave_height_estimates_without_attitude_measurements_docx/33979273 CC BY 4.0