Tenders are invited for E3CX-030 Fundamental Techniques, Models and Algorithms for a Mars Radio Navigation System. As part of the global exploration roadmap, Mars has been identified as the key target. A first stepping stone towards this is to perform a sustainable and long-term exploration of the Moon. To achieve this, ESA with the Moonlight Programme has now started to develop a radio navigation (and communications) system (LCNS) to provide Navigation services to lunar users and support exploration. The next step is to investigate how these developed Navigation techniques and concepts can be applicable to Mars, to define the updates needed and ascertain the levels of performance achievable with a view to deploying such a system in the 2030/40s in the frame of the Application Mission. The activity is comprised of the following tasks:1. Confirm suitability and assess performance possible from reuse of Lunanet/Moonlight S-band AFS signal for mission one-way navigation and define any needed changes such as navigation message inclusion of atmospheric corrections;2. Investigate two-way navigation using comms signals (UHF/S/K band) and compatibility with the one-way navigation signal;3. Assess current Mars and other terrestrial/celestial reference systems and their performance and applicability to precise radio frequency services, identify what is missing and propose a roadmap to cover any gap;4. Investigate ODTS approaches and link to reference frames and timescales including an ODTS simulator;5. Define a complete concept(s) covering ODTS, reference frame, time system, signal characteristics to be used in any potential Mars radio navigation system and concretely as input to a Phase B2 system study, defining also the development plan to reach high TRL;6. Define the scope and experimentation plan for potential initial In-Orbit Validation element(s) as a first step towards a complete radio navigation system for the Application Mission. This activity is critical both in terms of technical content and timing due to its intrinsic links to all navigation aspects of LightShip Phase A/B1. It is essential that the fundamental navigation techniques, models and algorithms for Mars are sufficiently analysed, traded and then baselined to allow the MARCONI navigation payload and end-to-end mission and service architecture to be correctly defined as part of the Phase A/B1. Tender Link : https://esastar-publication-ext.sso.esa.int/ESATenderActions/filter/open
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