A5035682426- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Planetary Science and Exploration
- Meteorological Phenomena and Simulations
- Solar Radiation and Photovoltaics
- Gamma-ray bursts and supernovae
- Atmospheric and Environmental Gas Dynamics
- Space Satellite Systems and Control
- Geochemistry and Geologic Mapping
- Atmospheric Ozone and Climate
- Radiation Detection and Scintillator Technologies
- Geophysics and Gravity Measurements
- Radiation Therapy and Dosimetry
- Monetary Policy and Economic Impact
- Additive Manufacturing and 3D Printing Technologies
- Gas Dynamics and Kinetic Theory
- Stock Market Forecasting Methods
- Energy Load and Power Forecasting
- Lightning and Electromagnetic Phenomena
- Distributed and Parallel Computing Systems
- Magnetic Bearings and Levitation Dynamics
- Geological and Geochemical Analysis
Université de Toulouse
2014-2024
Office National d'Études et de Recherches Aérospatiales
2016-2024
Institut Superieur de l'Aeronautique et de l'Espace (ISAE-SUPAERO)
2016
CEA LETI
2013
CEA Grenoble
2013
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2013
The Near-Earth Space Radiation and Plasma Environment falls within the realm of G3 Cluster (G3 refers to 'Near-Earth Environment' 'Coupled Geospace System') under COSPAR (Committee On Research) /International Weather Action Teams (ISWAT) Initiative. diverse dynamic particle populations from this region pose challenges both science space weather-impact perspectives. cluster has intimate connections with solar, heliosphere clusters, other ones (G1, G2) through a chain physical processes. This...
Specification models for radiation belts are essential the design of resistant, long-lasting spacecraft. Using available in-situ measurements allows these to virtually describe average space environment. However, their dependence on observations may make them suffer from data gaps which lead poor assessment degradation risks. To counter this problem, one can have access continuous descriptions belt dynamics long time periods through climate reanalysis. This operation consists in assimilation...
Many machine learning models have provided significant results in predicting the geomagnetic activity quantified by Earth-measured indices. For instance, one such model is SERENADE that provides probabilistic forecasts of Kp index, days ahead solely from solar imaging. It consists three modules combining convolutional, recurrent, and linear neural network layers first extract important information contained input imagery transform them into an intelligible forecast. To improve performance...
Energetic electrons in Earth’s radiation belts emit cyclo-synchrotron as they are deflected by the planet’s magnetic field. These emissions provide valuable insights into spatial and energy distributions of trapped their dynamic behavior over time. However, because this occurs at frequencies below 10 MHz, it is blocked ionosphere, making direct observation from Earth impossible. Current situ satellite measurements offer critical data but limited temporal coverage, leaving...
Abstract In this paper, we present a new method to compute rapidly, wave particle interaction induced pitch angle and momentum diffusion coefficients. Those terms are normally obtained by the numerical solving of equations based on quasi‐linear theory. However, bulk resolution leads high computational cost, preventing integration plasma density VLF waves nowcasts forecasts. Therefore, in context SAFESPACE project (H2020), implemented code called FARWEST (FAst Radiation with Waves ESTimator),...
The Ca index is a time-integrated geomagnetic that correlates well with the dynamics of high-energy electron fluxes in outer radiation belts. Therefore, can be used as an indicator for state filling belts those electrons. also has advantage being ground-based measurement extensive historical records. In this work, we propose data-driven model to forecast up 24 h advance from near-Earth solar wind parameters. Our relies mainly on recurrent neural network architecture called Long Short Term...
Abstract. Radial diffusion has been established as one of the most important mechanisms contributing to both acceleration and loss relativistic electrons in outer radiation belt, well supply particles inner belt. In framework “SafeSpace” project, we have used 9 years (2011–2019) multi-point magnetic electric field measurements from THEMIS A, D E satellites create a database radial coefficients (DLL) ultra-low-frequency (ULF) wave power spectral densities (PSDs) spanning an L∗ range 3 8. this...
Abstract Many models of the near‐Earth's space environment (radiation belts, ionosphere, upper atmosphere, etc.) are driven by geomagnetic indices, representing state disturbance Earth's magnetosphere. Over past decade, machine learning‐based methods for forecasting indices from near‐Earth solar wind parameters have become popular in weather community. These often prove to be very accurate and skilled. However, these approaches notable drawback being effective an operational context only...
Abstract The H2020 SafeSpace project aims at the implementation of a space weather safety prototype, in particular to predict deep charging hazard. proposed service is built on Sun‐to‐Earth chain physical codes that propagates information and uncertainties order model outer radiation belt dynamics. In this paper, we present inner magnetosphere section pipeline relies solar wind driven hourly updated models describe trapped electron environment (VLF waves, cold plasma seed population...
Developing an automated pipeline for solar-wind condition prediction upstream of Earth is important step transitioning from space weather research to operation. We develop a prototype called “Helio1D” model ambient solar wind conditions comprising temporal profiles speed, density, temperature, and tangential magnetic field at L1 up 4 days in advance. The connects the MULTI-VP coronal that provides daily predictions 0.14 AU 1D magnetohydrodynamics (MHD) propagates 1 AU. As part development...
IPDiA presents itself as the 3-D silicon leader providing innovative platforms for customers who want to demonstrate technological concepts based on TSV (Through Silicon Vias). The market segments Medical, Lighting, and Industrial addressed by Technology are adopting 2.5-D technologies increase performances density of their devices through use interposers TSV. Such can provide smaller form factors lower power consumption while offering benefits such allowing manufacturers combine...
The general enthusiasm aroused by space tourism combined with the great technological achievement of Scaled Composites SpaceShipOne in 2004 initiated a new era: suborbital tourism.As today, most vehicles have been designed for performance, combining advanced technologies from both aeronautics and astronautics.Nevertheless, order to become viable, must be safe enough carry paying passengers they match increasing demand.Thus, implementation design process based on adapted requirements led...
Abstract. In this paper, we present the SafeSpace prototype for a safety warning system, dedicated to electron radiation-belt-induced internal charging hazard aboard spacecraft. The space weather tool relies on synergy of physical models associated in chain that covers whole Sun–interplanetary-space–Earth's inner magnetosphere medium. With propagation uncertainties along modelling pipeline, provides global nowcast and forecast (within 4 d lead time) radiation belt dynamic as well tailored...
Abstract Radial diffusion is one of the dominant physical mechanisms driving acceleration and loss electrons in outer radiation belt. Therefore, accurate estimation radial coefficients ( D LL ) crucial for detailed belt modeling. In recent years several semi‐empirical (SE) models have been developed which predominantly rely on parameterizations Kp index. However, studies suggested that estimations derived from such can large deviations actual (measurement derived) values. this work we used...
Abstract The high kinetic energy electrons that populate the Earth's radiation belts emit synchrotron emissions because of their interaction with planetary magnetic field. A lunar near side array would be uniquely positioned to image this emission and provide a real time measure how are responding current solar input. Salammbô code is physical model dynamics three‐dimensional phase‐space electron densities in belts, allowing prediction 1‐keV 100‐MeV distributions trapped belts. This...
Electric Orbit Raising (EOR) for telecommunication satellites significantly reduced on-board fuel mass at the price of extended transfer durations. These relatively long transfers, which usually span a few months, cross large spans radiation belts, resulting in significant exposure spacecraft to space radiations. Since they are not very populated, environment intermediate regions belts is less constrained than on popular orbits such as low Earth orbit or geostationary standard models. In...
We have extended the iterative multiscale patch method to a class of nonlinear problems using an adaptative linearization strategy.Theoretical convergence results are provided in this paper, and we showcase simulation space plasma around negatively charged array solar generator interconnect.
Climate reanalysis represents a valuable tool to improve radiation belt specification models such as ONERA's GREEN (Global Radiation Earth Environment) model. Generally, it consists in the elaboration of long-term database best estimates by assimilation in-situ-data theoretical Salammbô code. However, their construction needs strong confidence code's physical description, but also its numerical resolution. We present this paper new solver Salammbô. The latter provides stronger accuracy,...
Abstract. In this paper, we present the SafeSpace prototype for a safety warning system, dedicated to electron-radiation-belt induced internal charging hazard, aboard spacecraft. The space weather tool relies on synergy of physical models associated in chain that covers whole Sun-interplanetary space-Earth's inner magnetosphere medium. With propagation uncertainties along modelling pipeline, provides global nowcast and forecast (within 4-day lead time) electron radiation belt dynamic as well...
The simulation of the impact small-scale components on electrostatic charging a spacecraft requires implementation new multiscale numerical schemes. For instance, resolving solar array interconnects is needed to accurately simulate current collection by satellite with electric propulsion. We here present an nonlinear patch method in Spacecraft Plasma Interaction Software (SPIS) code. This allows for local mesh refinements embedding relatively coarse and iteratively solving different meshes....