The European Space Agency has confirmed that the Sentinel-1D satellite is fuelled and ready for encapsulation, marking a key milestone in its launch campaign. The spacecraft is scheduled for liftoff on Tuesday, 4 November, aboard an Ariane 6 rocket from French Guiana.
Part of the Copernicus Earth observation programme, Sentinel-1D will continue the mission's delivery of high-resolution rad by Erica Marchand
Paris, France (SPX) Oct 21, 2025
The European Space Agency has confirmed that the Sentinel-1D satellite is fuelled and ready for encapsulation, marking a key milestone in its launch campaign. The spacecraft is scheduled for liftoff on Tuesday, 4 November, aboard an Ariane 6 rocket from French Guiana.
Part of the Copernicus Earth observation programme, Sentinel-1D will continue the mission's delivery of high-resolution radar images of Earth's surface, operating day and night and under all weather conditions. The mission provides critical data for disaster management, maritime surveillance, environmental monitoring and climate research.
Once operational, Sentinel-1D will join Sentinel-1C in orbit, together ensuring the continuity and reliability of Copernicus radar imaging services. The two satellites are equipped with C-band synthetic aperture radar (SAR) instruments, capable of capturing detailed surface imagery regardless of cloud cover or light conditions. Both also carry Automatic Identification System (AIS) payloads, enabling enhanced tracking of ships and improved maritime situational awareness.
With Sentinel-1A having exceeded its intended lifespan after 11 years in orbit, Sentinel-1D will take over its role in maintaining mission coverage and data continuity.
Following the successful Flight Readiness Review last week, ESA's Sentinel-1 Project Manager, Thibaut Decoopman, confirmed that final preparations for encapsulation are underway. "Since it arrived in French Guyana, Sentinel-1D has successfully completed the last integration steps and undergone the functional tests. The satellite is now fuelled and in good health, perfectly on-time for mating onto the launcher, thanks to the continuous dedication of our industry colleagues and ESA team members," he said.
Encapsulation of the spacecraft is scheduled for Friday, 24 October.
The Copernicus programme, managed by the European Commission in partnership with ESA, remains the world's largest environmental monitoring initiative, providing free and open-access data to support sustainable development, environmental protection and emergency response worldwide.
Related Links
Sentinel-1 at ESA
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