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This project, renamed ACROSS (Asteroid Collaborative Research by Occultation Systematic Survey), aimed at considerably improving the predictability of stellar occultations by small and difficult targets such as the Near Earth Asteroids (NEAs). In particular, it focused on the binary asteroid 65803 Didymos, target of the DART (NASA) and Hera (ESA) missions, and other NEAs: either secondary targets of Hera, or NEAs whose orbit is accurate enough. Stellar occultations are an unbeatable approach to:
Observatoire de la Côte...
In recent years, surface-penetrating radars have formed a part of several ESA missions in both monostatic and bi-static configurations. Such radars can be found, for instance, on board Mars Express where, using MARSIS, the Martian sub-surface is sensed, as well as on board Rosetta where CONSERT was used to probe the comet 67P/Churyumov-Gerasimenko.
Institut de Planétologie...
In this report, we describe the advisory study for both the Asteroid Impact Monitoring (AIM) as a stand-alone European mission and for AIM with its second component, the US Double Asteroid Redirection Test (DART) mission under study at NASA by the John Hopkins University Applied Physics Laboratory.
Observatoire de la Côte...
This purpose of the study was to develop a high frequency radar to sound the first tens of metres of asteroid regolith and to achieve 3D tomography with metric resolution in order to
- Determine its structure and layering
- Identify geomorphological elements (rocks, boulders, etc.) embedded in the sub surface
- Map the spatial variation its texture
- Derive an estimate of dielectric permittivity of the sub-surface material
Institut de Planétologie...
This report reviews the recently completed and current work programs on various aspects of hypersonic aerodynamics research conducted in European research organisations. Four main fields are covered: configuration aerodynamics, propulsion aerodynamics, rarefied flows and associated non-equilibrium effects, and real gas effects. In each field, a brief description or comment appears on each job, together with references to published papers, a job index and an address for each contributor.
Office national d'...
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