The Sentinel-4 mission has delivered its first images, highlighting concentrations of atmospheric nitrogen dioxide, sulphur dioxide and ozone. Despite being preliminary, these images are a major milestone in Europe’s ability to monitor air quality all the way from geostationary orbit.
Launched in July 2025, the Sentinel-4 ultraviolet–visible–near-infrared spectrometer is hosted on the first Meteosat Third Generation Sounder satellite. This dual-mission architecture allows for efficient use of the satellite, combining meteorological and atmospheric composition monitoring capabilities on a single platform.
