Sentinel-1D is launched on Ariane 6

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The Copernicus Sentinel-1D satellite has joined the Sentinel-1 mission in orbit. Launch took place on 4 November 2025 at 22:03 CET (18:03 local time) on board an Ariane 6 launcher from Europe’s Spaceport in French Guiana.

The Sentinel-1 mission delivers high-resolution radar images of Earth’s surface, performing in all weathers, day-and-night. This service is used by disaster response teams, environmental agencies, maritime authorities and climate scientists, who depend on frequent updates of critical data.

Sentinel-1D will work in tandem with Sentinel-1C, flying in the same orbit but 180° apart, to optimise global coverage and data delivery. Both satellites have a C-band synthetic aperture radar (SAR) instrument on board, which captures high-resolution imagery of Earth’s surface. They are also equipped with Automatic Identification System (AIS) instruments to improve detection and tracking of ships. When Sentinel-1D is fully operational, it will enable more frequent AIS observations, including data on vessel identity, location and direction of passage, enabling precise tracking.

Sentinel-1D was launched on Europe’s heavy-lift rocket Ariane 6 on flight designated VA265.

Read full story: https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-1/Sentinel-1D_reaches_orbit_on_Ariane_6

Credit: ESA/CNES/Arianespace/Arianegroup

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