The Sentinel-1D satellite is scheduled to launch from Europe's Spaceport in French Guiana on November 4th. 18:03 PM local time (22:03 PM in mainland Spain), using the Ariane 6 launcher. This is a significant event for the European Earth observation programme, with a time window already set and a defined flight profile.
This new satellite is part of Copernicus, the EU's Earth observation system, with a contribution from the European Space Agency (ESA). Designed for operation during the 2030s, the vehicle was developed by Thales Alenia Space, the prime contractor, and arrived in French Guiana on 11 September 2025 for final preparation.
Launch: date, time and place
Identified as VA265The Ariane 6 flight planned for this mission will be the third launch of Europe's new heavy-lift rocket. This milestone continues to consolidate Europe's ability to send satellites into orbit using its own resources and within a competitive schedule.
After takeoff, the satellite separation is planned around 34 minutes, at which point Sentinel‑1D will be inserted into a sun-synchronous orbit at an altitude of approximately 693 kilometers. This orbital profile allows for the acquisition of images with consistent illumination, which is key for time-series observations.
Once in orbit, the commissioning phase will begin: verification of subsystems, calibration and validation of the radar instrument and communications and control checks. Only after these steps are completed will the satellite enter full operation for regular data transmission.
What Sentinel-1D will be used for and what it brings to Copernicus
The satellite incorporates advanced radar technology capable of providing images regardless of cloud cover and the day/night cycle. This will provide essential data for monitoring the sea ​​ice, icebergs and glaciers, in addition to supporting the detection of ground subsidence and possible oil spills.
- Monitoring polar zones and cryosphere for mapping ice and glacier dynamics.
- Temperature control maritime safety and support for navigation routes with continuous observation.
- Detection of oil spills and early impact assessment.
- Measure ground deformations and subsidence in urban areas and infrastructure.
Sentinel-1D capabilities will strengthen the Copernicus services, which offers free and reliable data to public administrations, businesses, and citizens. This continuous monitoring will facilitate better-informed decisions in emergencies, territorial planning, and environmental policies.
The launch is also part of European investment in safer communities, more effective disaster response and long-term resilience, while strengthening autonomy in accessing space. The VA265 mission underscores the role of Ariane 6 as a key vehicle in the European strategy.
On the industrial level, Thales Alenia Space Arianespace is leading the manufacturing of Sentinel-1D, while Arianespace operates the launch from Europe's Spaceport. ESA and the European Union, through Copernicus, ensure the continuity of a system that provides reference data sets for the scientific and operational community.
The appointment of November 4th will test the integration between satellite and launcher, with Ariane 6 as the protagonist of the VA265 mission. If the planned deployment and subsequent calibration are met, the deployment into orbit will pave the way for a new era of continuous, highly reliable observation for Copernicus.