# Commission Implementing Decision (EU) 2018/621 of 20 April 2018 on the technical specifications for the Copernicus space component pursuant to Regulation (EU) No 377/2014 of the European Parliament and of the Council (Text with EEA relevance), Division: Development and Procurement of the Sentinel-1, -2, -3 C/D units

Extent: E+W+S+N.I.

ESA shall be responsible for the procurement, development and Flight Acceptance Review of the Sentinel-1, -2, -3 C and D units. In addition, the launch preparation activities of the –C units shall be covered by Copernicus, in case they occur before 31 December 2021.
The C and D units shall be procured with equivalent technical specifications as the A and B units to ensure technical and operational consistency. However, the development of the A, B and C, D units shall take into account hardware obsolescence due to the time difference with the development of the A and B units. The Sentinel-1 C and D units should be equipped with an Automatic Identification System (AIS) instrument to augment the SAR payload data for ship marine traffic applications and all C and D units shall be equipped with GNSS receivers. The Sentinel-1 and -2 C and D units shall include an Optical Communication Payload and the Sentinel-3 C and D units shall include a DORIS payload, all procured as part of the contract and financed within Copernicus.

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Source: https://www.legislation.gov.uk/eudn/2018/621/annex/division/3/division/3.2/division/3.2.2/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2018-621/annex/division-3/division-3.2/division-3.2.2/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.