Sentinel-1 mission<\/a> delivers high-resolution synthetic aperture radar (SAR) images of Earth\u2019s surface whenever needed, in all weathers, day-and-night. This service is used by disaster response teams, environmental agencies, maritime authorities, climate scientists, and the wider Earth observation user community worldwide, who depend on frequent updates of critical data.<\/p>\nSentinel-1 data contributes to numerous Copernicus services and applications, including Arctic sea-ice monitoring, iceberg tracking, routine sea-ice mapping and glacier-velocity measurements. It also plays a vital role in marine surveillance, such as oil-spill detection, ship tracking for maritime security and monitoring illegal fishing activities.<\/p>\n
Additionally, it is widely used for observing ground deformation caused by subsidence, earthquakes and volcanic activity, as well as for mapping forests, water and soil resources. The mission is crucial in supporting humanitarian aid and responding to crises worldwide.<\/p>\n
\tCutting-edge technology for enhanced data<\/p>\n
Sentinel-1D will join its twin in orbit, Sentinel-1C. When fully commissioned, it will replace Sentinel-1A, which has been in service for more than 11 years, well beyond its planned lifetime.<\/p>\n
The Sentinel-1D and Sentinel-1C satellites will work in tandem, orbiting on opposite sides of the globe, 180\u00b0 apart, to optimise global coverage and data delivery. Both satellites carry a C-band SAR instrument on board, together with an Automatic Identification System (AIS) instrument \u2013 so while capturing high-resolution imagery of Earth\u2019s surface, the mission also improves detection and tracking of ships over maritime zones. When Sentinel-1D is fully operational, it will enhance AIS observations, including more data on vessel identity, location and direction of travel, and precise tracking. Sentinel-1D and Sentinel-1C are both compatible with the Galileo navigation system, as well as other Global Navigation Satellite Systems.<\/p>\n
\tAbout Ariane 6<\/p>\n
Sentinel-1D was launched on an Ariane 6 rocket, flight VA 265, equipped with two boosters for this liftoff. Ariane 6 is Europe\u2019s heavy launcher and a key element of ESA\u2019s efforts to ensure autonomous access to space for Europe\u2019s citizens. Its modular and versatile design allows it to launch missions into low-Earth orbit as well as those destined to go much further into deep space. Standing more than 60 metres tall, Ariane 6 can weigh almost 900 tonnes when launched with a full payload.<\/p>\n
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