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17.12.2025 Copernicus Sentinel-6B delivers first altimeter images and reaches final orbit

Ground tracks of the Copernicus altimeter missions Sentinel-6B and Sentinel-6 Michael Freilich (respectively S6B and S6MF represented by thick lines), showing the Gulf Stream current in the North Atlantic Ocean off the coast of the United States. Colours along the tracks show sea level relative to a long-term average: red indicates higher-than-usual sea level, blue indicates lower-than-usual. Knowledge of Gulf Stream current systems is important for both ship routing and fisheries. The background image shows a global map of sea-surface height anomalies based on satellite altimeter data produced by the Copernicus Marine Service for 26 November 2025. All altimeter tracks display data collected on that same day. Image illustrative and not for operational use. Image: Contains modified Copernicus Sentinel data (2025), processed by Eumetsat

The first altimeter images from the European-US ocean-monitoring satellite Copernicus Sentinel-6B have been released on 16 December, just weeks after its successful launch on 17 November 2025, offering an early demonstration of...[more]

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12.12.2025 New version DT2024 of El Niño Southern Oscillation product

The El Niño Southern Oscillation maps and indexes have been updated with the DT2024 version of the DUACS input data.

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03.12.2025 SWOT Level-3: version 3.0 reprocessing & shorter latency

A new SWOT Level-3 release (v3.0) is now available on AVISO : L3 basic & expert 2-km products have been upgraded.

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25.11.2025 New version 3.0 of the 4DAtlantic-OHC product

The new version 3.0 of the 4DAtlantic-OHC (Ocean Heat Content) product is now available on Global Ocean.

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25.11.2025 SWOT at COP30 in Belém

COP30 in Belém Photo by IISD/ENB | Mike Muzurakis

The contribution of the SWOT mission to the observation of the ocean and the cryosphere, as well as its potential support to climate education, ocean literacy, and the promotion of space science, were presented during a...[more]

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18.11.2025 Sentinel-6B, keeping an eye on the oceans for climate monitoring

Artist's view of the Sentinel-6 program satellites © CNES/ill./DUCROS David, 2016

Successfully launched on November 17, the Sentinel-6B mission will track sea level rise, a key indicator of climate change.[more]

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06.11.2025 November 2025: Hurricane Melissa observed over ocean by satellites

Caribbean Sea on 2025/10/27 with Hurricane Melissa : the large swath is Swot Significant wave heights, while the thin lines are all nadir altimeters' SWH (including Swot's). The image south of Jamaïca shows winds from a Sentinel-1A acquisition with a dedicated extreme wind processing. (Data credits : Cnes/Nasa for Swot, Copernicus Marine Service for nadir altimeters, CYMS project (CLS for ESA) for Sentinel-1 extreme wind processing, hurricane Track RAMMB. Figure: Aviso)

Hurricane Melissa hitted Jamaica as a Category 5 hurricane on 2025/10/28. During its whole path, satellites observed the phenomenon, including altimeters and SAR over the ocean

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