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Ssalto/Duacs multimission altimeter products

Duacs is the Ssalto multimission altimeter data processing system. It serves in near-real time the main operational oceanography and climate forecasting centers in Europe and worldwide.

New experimental SSALTO/DUACS products soon available:

For 20 years, the DUACS system has been producing, as part of the CNES/SALP project, and the Copernicus Marine Environment and Monitoring Service (CMEMS), high quality multimission altimetry Sea Level products for oceanographic applications, climate forecasting centers, geophysic and biology communities... While the operational production of the Sea Level along track and maps is now generated as part as CMEMS, the development of a new experimental DUACS products started mid 2016 at CNES aiming at improving the resolution of the current products and designing new products. Using the global Synthetic Aperture Radar mode (SARM) coverage of Sentinel3A/B and optimizing the LRM altimeter processing (retracking, editing, ...) will notably allow us to fully exploit the fine-scale content of the altimetric missions. Thanks to this increase of real time altimetry observations we will also be able to improve Level-4 products by combining these new Level-3 products and new mapping methodology, such as dynamic interpolation. Finally, these improvements will benefit to downstream products: geostrophic currents, Lagrangian products, eddy atlas…

Coming soon:
- Along-track Sea Level Anomalies 5Hz
- Gridded Sea Level Anomalies computed with Dynamic Interpolation
- Gridded Sea Level Anomalies combining altimetry and drifters
- Gridded Sea Level Anomalies combining altimetry and SST


Ssalto/Duacs system processes data from all altimeter missions (Saral, Cryosat-2, Jason-1&2, T/P, Envisat, GFO, ERS-1 & 2 and even Geosat) to provide a consistent and homogeneous catalogue of products for varied applications, both for near real time applications and offline studies. Ssalto/Duacs Near-Real Time data are used, in particular, by Godae and its French contribution Mercator Océan. In delayed time, hundreds of teams retrieve historical Duacs datasets.

Latest Duacs maps (Sea Level Anomalies, top, Absolute Dynamic Topography, bottom). Browse through more of them through our "Sea views" interface. Credits CLS/Cnes.

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