Tenders are invited for Beyond-Earth Communication Network (Artes 4.0 Sl Spl 3a.215) Expro+ Re-Issue Objective: The objective of the activity is to study and evaluate architectures for a beyond-Earth optical communication network, considering coverage, possible data relay services to missions and technologies involved. The resulting network architecture shall consider inter-spacecraft links as well as direct to Earth links, evaluating operational constraints and technology gaps.A roadmap explicitly describing the technology gaps and the required investment for developing optical communications for beyond-Earth shall beestablished, improving data return and coverage offuture missions.Targeted Improvements:To investigate the increase of data capacity compared to state-of-the-art beyond-Earth communications.To identify technology gaps and network architectures based on the network capacity simulation tool to be developed.Description:The study shall investigate trade-offs on beyond-Earth communication architectures involving data relay satellites (e.g., in various Lagrange orbits) as well as optical ground stations in strategic places on Earth. The study shall analyse operational constraints, planetary coverage and the required technologies. A concept of operations (CONOPS) of a beyond-Earth network shall be designed including the space and the ground segments. Initial requirements at mission, system, and subsystem level shall be developed and a roadmap identifying gaps and the required developments shall be established. Direct optical communications to Earth does not have unlimited availability, for example due to clouds, or if the satellite is close (or behind) to the Sun. A data relay satellite in GEO relaying the data via radio to ground shall therefore be included in thestudy. A software simulation tool shall be developed to analyse and optimise potential network architectures. Furthermore, a rough order of magnitude (ROM) cost of deployment and operation of the optical beyond-Earth network shall be established Tender Link : https://esastar-publication-ext.sso.esa.int/ESATenderActions/filter/open
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