Copernicus Sentinel-3C is scheduled to launch on 15 September 2026, extending an Earth-observation mission that has monitored the planet since 2016. EUMETSAT lists liftoff at 01:21 UTC (03:21 CEST) from the Guiana Space Centre in Kourou, French Guiana, aboard a Vega-C rocket.
When to follow the launch
EUMETSAT’s launch page, published and updated on 14 September, schedules its live broadcast to begin at 02:45 CEST on Tuesday 15 September. The planned liftoff is set for 03:21 CEST, giving viewers a broadcast window before the rocket’s scheduled departure. The UTC time is useful as the international reference; viewers in Central European Summer Time can follow the 03:21 schedule.
The event remains planned rather than completed. The date, broadcast, launch time, vehicle and site describe the current timetable, but they do not confirm that Vega-C has flown or that Sentinel-3C has reached orbit.
EUMETSAT’s launch informationWhat Sentinel-3C is expected to continue
EUMETSAT describes the Sentinel-3 satellites as a system for systematic, high-precision monitoring of Earth’s oceans, land, ice and atmosphere. Sentinel-3C is presented as the next satellite in that observing mission, with the immediate significance of continuity across those broad areas rather than a separately announced measurement or result.
That distinction sets the practical expectation for readers following climate, weather and environmental data. The scheduled launch does not itself add a new Sentinel-3C dataset or establish a change in current data availability. No new measurement, performance figure or operational result has been announced in the information available before liftoff.
The confirmations that matter next
The first checkpoint is the Vega-C liftoff during the scheduled launch window. A successful departure would move Sentinel-3C beyond the timetable, but it would still not by itself confirm that the satellite has begun its mission. The later confirmation that Sentinel-3C is operational is the point at which its role in the Sentinel-3 observing system can be assessed.
Until those events are confirmed, the 15 September date should be read as a launch plan, not as proof that the spacecraft is in orbit or producing observations. Readers can follow EUMETSAT’s live coverage for the planned departure, then look for confirmation of the satellite’s mission status before treating Sentinel-3C as an active source of data.
For now, the concrete development is a Vega-C launch scheduled from Kourou on 15 September 2026. The mission’s intended scope remains the monitoring of oceans, land, ice and atmosphere, while the launch outcome and operational status are still pending.
