Key Highlights:

• Calibration and Validation: Calibration and validation (cal/val) processes for both NRT and STC datasets have been successfully completed. This ensures that the data meet the highest standards of accuracy and reliability, making them immediately accessible to users for a wide range of applications.
• Data Content: The L2 altimetry datasets are provided in both "standard" and "reduced" forms. The standard datasets include a wealth of information such as Sea Surface Height Anomaly (SSHA), Significant Wave Height (SWH), and Wind Speed. Additionally, they feature 1 Hz and 20 Hz measurements from the Poseidon-4 radar altimeter, orbit altitude, environmental range corrections, instrument corrections, and geophysical models. The reduced datasets focus on the most essential parameters, ensuring efficient data handling and analysis.
• Data Access: L1B and L2 data are distributed by EUMETSAT on EUMETCast, the Data Store, and WIS2.0:
  • Poseidon-4 Altimetry Level 1B Low Resolution data
  • Poseidon-4 Altimetry Level 1B High Resolution data
  • Poseidon-4 Altimetry Level 2 Low Resolution data
  • Poseidon-4 Altimetry Level 2 High Resolution data
• The L1B and L2 datasets are described and also discoverable via the NASA's Earthdata portal.

Further information can be found at the links below:

-NASA's Earthdata: https://www.earthdata.nasa.gov/data/alerts-outages/sentinel-6b-altimetry-nrt-stc-datasets-release

-EUMETSAT: https://user.eumetsat.int/news-events/news/release-of-sentinel-6-b-altimetry-data

Please be informed that Jason-3 spacecraft has completed on 2026/06/26 the maneuver of transfer to the new interleaved Long Repeat Orbit, shifted 4km on ground track with respect to previous orbit at the same altitude.
Maneuver was successful and the spacecraft is planned to stay on this new orbit for one year.

The missions has continued during the last week and the products have been correctly produced and distributed. No change expected.
IGDR has been now validated and their distribution will be resumed shortly.

Next orbit maneuver is expected in one year (end of June/beginning of July 2027) to return on Jason-2 LRO to fill the gaps due to safehold mode.

Best regards,

The AVISO Team

The planned maintenance operation on the AVISO website has been successfully completed.

The website is now fully available again and all services are operational, including user registration, account management, and data mailing lists update.

Data dissemination and download services remain available as usual.

If you encounter any issue following this upgrade, please contact us at aviso@altimetry.fr.

Thank you for your patience and understanding throughout this maintenance period.

The AVISO Team

As part of our continuous service improvement activities, the AVISO website will undergo a technical upgrade.

The operation is scheduled from July 6, 2026, 14:00 (UTC+2) to July 9, 2026, 14:00 (UTC+2).

During this maintenance window, the websites may be temporarily unavailable and a maintenance page will be displayed.

Data dissemination and download services will remain operational throughout the intervention. Users with valid AVISO accounts will continue to access and download data normally.

We apologize for any inconvenience and thank you for your patience and understanding.

The AVISO Team

Reference: Vega-Gimenez, D.,  Amores, A.,  Paris, A., &  Pascual, A. (2025).  Expanding the coastal observation frontier: SWOT reveals the spatial footprint of storm surges. Geophysical Research Letters,  52, e2025GL117299. https://doi.org/10.1029/2025GL117299

See the full story on Swot ADaC web site:
Publication: Swot can map the spatial structure of storm surges across diverse oceanic regimes

Reference: Rolland, R., Bouruet-Aubertot, P., Cuypers, Y., Bosse, A., Petrenko, A., Maytie, T., et al. (2026). Near-inertial wave trapping inside a fine-scale anticyclonic eddy during the BioSWOT-Med 2023 cruise: Turbulence and energy flux. Journal of Geophysical Research: Oceans, 131, e2025JC022984. https://doi.org/10.1029/2025JC022984

See the full story on Swot ADaC web site:
Publication: Swot reveals that fine-scale eddies are as efficient as larger and more energetic structures in modulating turbulence in the ocean interior

See a presentation of the results on Swot Adac web site by T. Ballerini.

Reference

Rebouillat, E., Oruba, L., Hopuare, M., Planes, S. and Dormy, E., 2026. SWOT sheds light on seiche oscillations within atoll islands. Geophysical Research Letters, 53(4), p.e2025GL119801. https://doi.org/10.1029/2025GL119801

The CFOSAT Level-2 SWIM product in version 7.1 has been updated with a significant evolution: the extension of the slope spectrum range from 500 meters to 1112 meters. This improvement aims to enhance the product's accuracy and representativeness. For more detailed information, please refer to the Release Note: CFOSAT AWWAIS 7.1 main evolutions.

Key Changes and Improvements:

• Slope Spectrum Extension: The slope spectrum has been extended from 500 meters to 1112 meters. However, parasitic peaks at wavelengths beyond 800 meters have been identified, impacting the detection performance of partitions.
• Detection Limit Adjustment: To address this issue, the detection limit for partitions has been set to 800 meters. This adjustment reduces artificial rebounds observed around 400–450 meters, leading to a more accurate distribution.
• High Correspondence Between Datasets: The matching between the old dataset (22.5–500 meters) and the new dataset (22.5–1112 meters) shows a high correspondence, particularly for partitions 1 and 2, with over 90% matching.