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Satellite science: FSU research increases accuracy of high-resolution ocean surface measurements

FSU-led research introduces a HYCOM-based framework that predicts kilometer-scale internal tides to clean SWOT satellite measurements, aligning ocean observations with reality.
The study uses HYCOM data assimilation to merge physics-based ocean models with real-time observations from satellites, floats, buoys, and ships for daily corrections.
Internal tides, once deemed chaotic to fix, are now separable into predictable and chaotic components to improve SWOT measurements.
The updated SWOT data achieved about a 59 percent improvement over the best existing correction method.
SWOT operates jointly by NASA and CNES from an altitude of roughly 500 miles, capturing high-resolution surface data for hydrology and ocean science.
The model continuously ingests multi-source measurements to stay aligned with reality and recalibrate the ocean state.
The new framework uses HYCOM’s internal tide predictions to distinguish and remove tidal interference from SWOT’s signals.
The collaboration spanned multiple institutions, including University of Michigan, Oregon State, Naval Research Laboratory, and CLS Group, highlighting cross-sector impact.
The research was funded by ONR, NASA, and CNES, reflecting strong government and space agency backing for improved Earth observation.
Overall, SWOT’s clarified measurements help illuminate ocean heat and carbon transport, aiding climate projections and Earth-system understanding.

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