Sentinel-3 Services

Sentinel-3 supports the monitoring of the Marine Environment with products, including altimetry, sea surface temperature and ocean colour.

Sentinel-3 SLSTR

The marine data and products are primarily developed to support the maritime safety services that need:

  • ocean-surface wave information, surface temperature and data to improve ocean current forecasting systems;
  • sea-water quality and pollution monitoring, requiring advanced ocean colour products in both open ocean and coastal oceanographic application areas;
  • sea surface topography measurements;
  • sea-ice charting services, requiring sea-ice extent and iceberg detection.

Altimetry Services

Ocean Colour Services

Sea Surface Temperature Services

Timeliness of products

  • Near-Real-Time (NRT): products shall be available to the users within three hours after sensing.
  • Short-Time-Critical (STC): products available to the users within 48 hours after sensing.
  • Non-Time-Critical (NTC): products available to the users within one month after sensing.

Our suite of Ocean Products.

EUMETSAT is responsible for marine data and products, while ESA is responsible for land data and products.

Access Copernicus Data

EUMETSAT provides access to the Sentinel-3 marine products - and, in future, products from Sentinel-4, Sentinel-5 and Sentinel-6 - via EUMETCast satellite/terrestrial, via the Copernicus Online Data Access (online rolling archive with http access) or through the EUMETSAT Data Centre.

Earth Observation Portal (EOP)

The Earth Observation Portal is the main entry point to EUMETSAT’s Earth Observation data, including data provided via EUMETCast from our many partner organisations. Register and subscribe here to receive data.

Product Navigator

The Product Navigator is the central catalogue for all EUMETSAT data and products, including third-party product disseminated on EUMETCast. To discover our data go to the Product Navigator.


EUMETCast is EUMETSAT’s primary dissemination mechanism, providing access to near real-time data through DVB satellite or terrestrial network, with a guaranteed service level.

Copernicus Online Data Access

The Sentinel-3 Marine and Atmosphere Products are available through the Copernicus Online Data Access (CODA). The CODA is an online rolling archive with http access and 14 days of data online.

Data Centre

Ordering and delivery service for historical and long-term archive data from the EUMETSAT contributing missions and Sentinel-3 marine and atmosphere products.


EUMETView is a new web imagery service based upon Web Map Service (WMS) technology which allows users to view EUMETSAT data and products and to access image layers. EUMETView will be enhanced with imagery from Sentinel-3 marine data and products.

How is sea surface temperature data used?

Sea surface temperature data is used as input for weather and ocean forecasting, to observe and monitor ocean current systems and ocean fronts, eddies, upwelling areas, marine ecosystems and the development of large scale El Niño/La Niña events.

Because of the importance of sea surface temperature to the global heat budget it is monitored as an essential climate variable (ECV).

Sea surface temperature data is also used to improve scientists’ understanding of the ocean surface layer, upper ocean variability, energy transfer, and air-sea interactions.

Other important areas of research include developing a better understanding of the impact of changes in the temperature of the ocean surface over the course of the day and changes between the temperature at the ocean surface and the depths below.

SST data is also used to help manage marine ecosystems, for example to identify frontal areas with large congregations of fish or monitor coral bleaching events, and also for travel and tourism.

How is sea surface temperature data used?

Ocean colour provides a window into the ocean ecosystem and can be used to:

  • Track and forecast harmful algal blooms that are a danger to humans, marine/freshwater life and aquaculture.
  • Monitor coastal water quality.
  • Guide marine resource management, for example fisheries.
  • Monitor climate change – ocean colour is one of the so-called Essential Climate Variables listed by the World Meteorological Organization to detect biological activity in the ocean’s surface layer. In addition phytoplankton take up carbon dioxide (CO2) during photosynthesis, making them important carbon sinks. Ocean colour data can be used to monitor the annual global uptake of CO2 by phytoplankton on a global scale.
  • Monitor global ocean primary production.
  • Track sediment transport in coastal areas.
  • Study the Earth system, for instance monitoring EL Nino/La Nina and impacts on the ocean ecosystem.
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