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08/10/2025
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The Copernicus Sentinel-1 mission is about to get its fourth satellite tv for pc. Copernicus Sentinel-1D has now undergone the checks and useful checks previous to its integration with Ariane 6, prepared for launch later this 12 months.
When it joins its sibling Sentinel-1C, which was positioned in orbit in December 2024, Sentinel-1D will considerably improve the capabilities of the Copernicus Earth commentary programme.
Why two satellites are higher than one
The launch of Copernicus Sentinel-1D will present a much-needed substitute to Sentinel-1A, which has been in orbit for 11 years now, properly past its deliberate lifetime.
Sentinel-1C has been absolutely commissioned and at present operates with Sentinel-1A to ship radar photos of Earth’s floor, performing in all weathers, day-and-night. This service is significant for catastrophe response groups, environmental businesses, maritime authorities, local weather scientists – and different customers who rely upon frequent updates of essential information.
Having two satellites in operation at anybody time is crucial for offering well timed information and might imply a big distinction between a late warning and a essential early warning. The arrival of Sentinel-1D will improve the Sentinel-1 mission’s efficiency in a number of methods:
Testing confirms Sentinel-1D is prepared
Functional checks have been performed on the spacecraft to confirm the spacecraft is in working order after being transported to Kourou.
These tests started with a pressurisation and leak check before the spacecraft was switched on. Afterwards several tests were performed to assess the spacecraft’s health status and the correct functionality of all sub-systems. The AIS antenna assemblies, which were transported to the launch site in separate containers, have also been integrated onto the spacecraft and the final connectivity test to ensure their correct electrical connection concluded the spacecraft functional testing.
The spacecraft is now ready for the next steps, including spacecraft finalisation before fuelling.
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