The launch of Sentinel-3B opens a new era for operational oceanography

The successful launch this evening of the Copernicus Sentinel-3B satellite from Plesetsk, Russia, will establish the European backbone of a space-based, global ocean monitoring system at the service of operational oceanography.

Wednesday, 25 April 2018

Thumbnail - Press Release - Sentinel-3B launch

The spacecraft will form a two-satellite constellation with Sentinel-3A, launched in February 2016, and thus complete the full deployment of the Copernicus Sentinel-3 mission to offer marine data users the global and frequent observations they need to monitor and forecast the ocean.

The dual-satellite Sentinel-3 mission is one of the six Sentinel missions deployed and exploited by ESA and EUMETSAT as the space component of the European Union’s flagship Copernicus Earth observation programme.

Under an agreement with the EU, EUMETSAT already performs flight operations of the Sentinel-3A satellite in cooperation with the European Space Agency (ESA). EUMETSAT also extracts marine products from the observations of the three instrument suites, the Ocean and Land Colour Instrument (OLCI), the Sea and Land Surface Temperature Radiometer (SLSTR) and the Synthetic Aperture Radar Altimeter (SRAL) and distributes them in real time, while ESA is responsible for land observations and products. In addition, EUMETSAT exploits the Jason-3 high precision ocean altimeter mission in synergy with Sentinel-3A on behalf of the EU, in partnership with CNES, NOAA and NASA.

After contributing to the new satellite commissioning led by the European Space Agency (ESA), EUMETSAT will take over the control of Sentinel-3B, perform flight operations of the Sentinel-3 two-satellite configuration from its Darmstadt headquarters and deliver two Sentinel-3 marine data streams.

EUMETSAT Director-General Alain Ratier said: “After the commissioning of Sentinel-3B, during which the two Sentinel-3 satellites will fly in tandem, 30 seconds apart, for cross-calibration, the satellites will be moved 140 degrees apart, as requested by the marine user community.

“This will provide full and frequent global coverage of ocean colour and sea surface temperature measurements and the best sampling of the ocean surface topography achievable by altimeter measurements from two Sentinel-3 and one Jason satellites. With this, we will have established the European backbone of an operational global ocean monitoring system and opened a new era for operational oceanography.”

EUMETSAT Competence Area Manager for Marine Applications Dr Francois Montagner said:  “During the commissioning of Sentinel-3B, the two Sentinel-3 satellites will be making the same observations 30 seconds apart, which will allow us to perform very accurate cross-calibration, as we did in 2016 for Jason-2 and Jason-3. As a result, the constellation of Sentinel-3A and -3B can really be seen as a single source of measurements.

“This is crucial for the development of ocean forecasting. Not only will this provide homogenous, unbiased observational inputs to construct the initial conditions required by ocean prediction models, but this will also constitute a unique source for validating the forecasts.”


The European Organisation for the Exploitation of Meteorological Satellites is an intergovernmental organisation based in Darmstadt, Germany, currently with 30 Member States (Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom).

EUMETSAT operates the geostationary satellites Meteosat -9, -10 and -11 over Europe and Africa, and Meteosat-8 over the Indian Ocean.

EUMETSAT operates two Metop polar-orbiting satellites as part of the Initial Joint Polar System (IJPS) shared with the US National Oceanic and Atmospheric Administration (NOAA).

EUMETSAT is also a partner in the cooperative sea level monitoring Jason missions (Jason-2, Jason-3 and Jason-CS/Sentinel-6) involving Europe and the United States.

The data and products from EUMETSAT’s satellites are vital to weather forecasting and make a significant contribution to the monitoring of environment and climate change.

The European Union has entrusted EUMETSAT with exploiting the four Sentinel missions of the Copernicus space component dedicated to the monitoring of atmosphere, ocean and climate on its behalf. EUMETSAT carries out these tasks in cooperation with ESA and already exploits the Sentinel-3 marine mission.

EUMETSAT has established cooperation with operators of Earth Observation satellites from Europe and China, India, Japan, Russia, South Korea and the United States.

Media Relations EUMETSAT

Tel: +49 6151 807 7320

Also available in:  English - Français - Deutsch


Image - Copernicus - Logos


We use essential cookies to ensure that we give you the best experience on our website. To analyse website traffic we also use third-party performance cookies. If you are ok with the use of essential as well as non-essential cookies, please select Accept & Continue. Instructions on how to prevent the use of non-essential cookies are available under our Terms Of Use, or simply select Decline Cookies.