Photo: Airbus
The European Space Agency (ESA) has confirmed the successful launch of Sentinel-4, an air quality monitoring instrument developed by Airbus, now hosted on the Meteosat Third Generation Sounder (MTG-S1) satellite. The launch proceeded as scheduled and expands Europe’s Earth observation...
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The European Space Agency (ESA) has confirmed the successful launch of Sentinel-4, an air quality monitoring instrument developed by Airbus, now hosted on the Meteosat Third Generation Sounder (MTG-S1) satellite. The launch proceeded as scheduled and expands Europe’s Earth observation infrastructure.
“The successful launch of Sentinel-4 on board MTG-S1 is further proof of the innovation and successful collaboration within the European space sector,” said Alain Fauré, Head of Space Systems at Airbus. “The data provided by Sentinel-4 will be an essential contribution to the Copernicus programme, helping us to monitor, and ultimately improve air quality for citizens across Europe.”
Sentinel-4 is a UV-VIS-NIR spectrometer designed to provide frequent updates on atmospheric composition, including measurements of nitrogen dioxide, ozone, sulphur dioxide, formaldehyde, and aerosols. Developed in Germany for ESA, the instrument is intended to support air quality monitoring, pollution forecasting, and analysis of long-term atmospheric trends across Europe.
By integrating Sentinel-4 into the MTG weather satellite, the mission combines meteorological and atmospheric composition observations, potentially supporting more accurate weather forecasts and improved understanding of climate–weather interactions.
Operating in geostationary orbit at 36,000 kilometres above Earth, Sentinel-4 will deliver hourly data covering Europe and North Africa. The data will be accessible without restriction through the Copernicus programme, supporting a range of users including researchers, environmental authorities, and policymakers.
This launch marks a milestone in ESA’s Copernicus programme, which aims to deliver consistent Earth observation data to support environmental monitoring and disaster response. A second Sentinel-4 instrument is currently under integration and is planned to fly aboard MTG-S2 in the 2030s.
EUMETSAT, the European Organisation for the Exploitation of Meteorological Satellites, will operate both the satellite and the Sentinel-4 instrument. The design of Sentinel-4 builds on ESA’s earlier atmospheric monitoring instruments, such as SCIAMACHY and TROPOMI on Sentinel-5P, also developed by Airbus.
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