The European Sentinel-1D Earth Observation Satellite's Journey to Space | ESA
The Copernicus Sentinel-1D satellite has joined the Sentinel-1 mission in orbit. Launch took place on November 4, 2025, at 22:02 CET (18:02 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 weather, day-and-night. This service is used by disaster response teams, environmental agencies, maritime authorities and climate scientists that depend on frequent updates of critical data.
Sentinel-1D will work with Sentinel-1C, in the same orbit but 180° apart, to improve global coverage and data delivery. Both satellites have a C-band synthetic aperture radar (SAR) instrument on board. It 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.
Learn more about the Sentinel-1D Satellite:
https://www.esa.int/Applications/Observing_the_Earth/Copernicus/Sentinel-1/Sentinel-1_mission_did_you_know
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