A5024478785- Planetary Science and Exploration
- Astro and Planetary Science
- Space Satellite Systems and Control
- Spacecraft Dynamics and Control
- Granular flow and fluidized beds
- Fluid Dynamics Simulations and Interactions
- Astrophysics and Star Formation Studies
- Space Science and Extraterrestrial Life
- Spacecraft and Cryogenic Technologies
- Space Exploration and Technology
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- High-Velocity Impact and Material Behavior
- Geophysics and Gravity Measurements
- Spaceflight effects on biology
- Radiation Therapy and Dosimetry
- Distributed systems and fault tolerance
- Spacecraft Design and Technology
- Ionosphere and magnetosphere dynamics
- Nuclear physics research studies
- Space exploration and regulation
- Modular Robots and Swarm Intelligence
- Geology and Paleoclimatology Research
- Stellar, planetary, and galactic studies
- Experimental and Theoretical Physics Studies
Centre National d'Études Spatiales
2019-2024
National Space Agency
2021
University of Colorado Boulder
2013-2018
Jet Propulsion Laboratory
2016-2017
Laboratory for Atmospheric and Space Physics
2017
Purdue University West Lafayette
2016
Delft University of Technology
2014-2015
Observatoire de la Côte d’Azur
2013
Centre National de la Recherche Scientifique
2013
Abstract The Japanese MMX sample return mission to Phobos by JAXA will carry a rover developed CNES and DLR that be deployed on perform in situ analysis of the Martian moon’s surface properties. Past images show it is covered layer regolith. However, mechanical compositional properties this regolith are poorly constrained. In particular, from current remote images, very little known regarding particle sizes, their chemical composition, packing density as well other parameters such friction...
A comprehensive method for modeling the motion of a spherical pod at surface an asteroid is presented. Using triangular faceted surfaces, largest features (global shape, monoliths, and large boulders) are modeled. The presence smaller rocks accounted using stochastic model rock generation collision. contact dynamics on regolith or harder including multiple points situations, described. force, torque, coefficient rolling resistance introduced, explained, estimated. Finally, this applied to...
Abstract The science operations of the spacecraft and remote sensing instruments for Martian Moon eXploration (MMX) mission are discussed by operation working team. In this paper, we describe Phobos observations during first 1.5 years spacecraft’s stay around Mars, Deimos before leaving system. observation, will be placed in low-altitude quasi-satellite orbits on equatorial plane make high-resolution topographic spectroscopic surface from five different altitudes orbits. also attempt to...
This paper investigates the sensitivities of spherical lander deployment to small bodies. Previous work established methods simulate motion such landers in gravitationally and topographically complex small-body environment. These are extended, primarily through inclusion a "persistent" rock model that accounts for observed distribution rocks boulders on surface. The resulting framework is applied investigate effects relevant environmental hardware parameters trends lander. In dynamically...
A simple, adaptable, and robust method for ballistic landings on the surface of a binary asteroid system is presented. The desire to deploy lander, from mother spacecraft passing in vicinity one collinear libration point system, an unpowered trajectory, meaning that active guidance not needed. From concepts circular restricted three-body problem, suitably adapted objective, features make such strategy feasible any are detailed. Proving this effective wide range actual systems, requirements...
The Discrete Element Method (DEM) is frequently used to model complex granular systems and augment the knowledge that we obtain through theory, experimentation, real-world observations. Numerical simulations are a particularly powerful tool for studying regolith-covered surfaces of asteroids, comets, small moons, where reduced-gravity environments produce ill-defined flow behaviors. In this work, present method validating soft-sphere DEM codes both terrestrial small-body environments....
MMX (Martian Moons eXploration) is a robotic sample return mission of JAXA (Japan Aerospace Exploration Agency), CNES (Centre National d' Etudes Spatiales), and DLR (German Center) with the launch planed for 2024. The aims to answer question origin Phobos Deimos, which will also help understand material transport in earliest period our solar system, how was water brought Earth. Besides JAXA's mothership, responsible sampling Earth, small rover built by land on in-situ measurements, similar...
Context. Impacts on small-body surfaces can occur naturally during cratering events or even strategically carefully planned impact experiments, sampling maneuvers, and landing attempts. A proper interpretation of dynamics allows for a better understanding the physical properties dynamical process their regolith-covered general evolution. Aims. This work aims to first validate low-velocity, low-gravity simulations against experimental results, then discuss observed collision behaviors in...
Context. Slow interactions on small body surfaces occur both naturally and through human intervention. The resettling of grains boulders following a cratering event, as well observations made during missions, can provide clues regarding the material properties physical evolution surface. In order to analyze such events, it is necessary understand how gravity influences granular behavior. Aims. this work, we study slow impacts into materials for different collision velocities levels. Our...
Following their success in low Earth orbit, nanospacecraft weighing less than 25 kg may soon contribute to the exploration of Solar System. This paper outlines necessary technologies that enable these small satellites be placed on an interplanetary trajectory. Propulsion is a key aspect this problem but only part it; because does not choose its launcher and injection launch opportunities propulsion systems must considered together. Specifications present upcoming electric thrusters limits...