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11.08.2025 A third tsunami observed by Swot, due to Kamchatka earthquake

Map of simulation of Tsunami 1 h 10 min after earthquake, with Swot swath (left), model, Swot KaRIn and Swot nadir data over the satellite ground track (right). (Credits: A. Deniau & F. Nencioli for the Swot data processing & the plot, A. Ruiz-Angulo & C. de Marez for the wave propagation model)

Just over an 1 hour after the recent Kamchatka earthquake and subsequent tsunami, the Swot satellite overflew the area, measuring the tsunami wave front, an important addition to tsunami propagation models.

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06.08.2025 New Slope correction for Sentinel-6A SAR altimetry

This product provides slope correction maps for Sentinel-6A SAR mode. These maps are derived from the approach originally developed for LRM mode by Sandwell and Smith (2014), adapted to reflect the geometry and orientation of SAR...

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05.08.2025 August 2025: Filaments help in understanding a harmful algal bloom

Finite-size Lyapunov exponents (FSLEs) and Lagrangian advection of virtual particles from altimetry data, can be used to understand the physical mechanisms of the toxic algae concentration.

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28.07.2025 Sentinel-6B traveling from Europe to its launch base in California

The next reference altimetry satellite, Copernicus Sentinel-6B, has begun its journey to the Vandenberg Space Force Base in California (USA), where it is scheduled to launch on November 17th. [more]

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28.07.2025 Swot observes interactions between waves, winds, and currents

Wind, currents, and wave conditions in the Gulf Stream region during SWOT pass on 2023-09-02 at 04:13 UTC. (a) wind speed and direction from the ERA-5 reanalysis, with wind speed from SWOT overlayed. (b) current speed and direction (only for current faster than 0.7 ms−1) from the HYCOM model. Geostrophic currents computed from SWOT's SSH observations overlayed. (c & d) WW3 significant wave height snapshots from simulations performed (c) without (CTRL) and (d) with (CURR) current forcing. Significant wave height from SWOT is overlayed on both (c) and (d). CFOSAT observations of significant wave height (thin line) and directional wave spectrum (inset) are shown on (d). (credit Colorado School of Mines)

With Swot, we can now observe significant wave heightin two dimensions at kilometer-scale resolution. This new capability provides an unprecedented view of how surface waves interact with winds and currents, and vice versa.

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22.07.2025 New Dynamic Atmospheric Correction using ERA5

The new DAC-ERA5 reprocessing is available on the period 01/02/1992 – 31/12/2022. It benefits from several improvements including a new bathymetry, a new model version (TUGO instead of MOG2D) and a new atmospheric forcing (ERA5...

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15.07.2025 New version 2.0 of Tide Gauges products

Two Corsica sites of Senetosa and Macinaggio tide gauges data have been fully reprocessed on March 2025.

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