Frédéric Schmidt
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View article: Spectrophotometry of Selected Regions of Europa—Revisiting Galileo NIMS Data
Spectrophotometry of Selected Regions of Europa—Revisiting Galileo NIMS Data Open
Europa’s surface is one of the most compelling mysteries of the solar system. It displays complex photometric behavior driven by its rich geology and interaction with the Jovian environment. Cryovolcanism across the surface creates frequen…
View article: Ancient Mars Climate With a Polar Ocean and Ice Sheet Dynamics
Ancient Mars Climate With a Polar Ocean and Ice Sheet Dynamics Open
In this article, we study the conditions required to maintain a stable ocean on Mars 3 Ga using a new suite of simulations. These simulations couple a 3D Global Climate Model with ocean dynamics and ice sheet flow. The model includes the m…
View article: The OMEGA-Py Python module: a complete and easy way to work with OMEGA/MEX observations
The OMEGA-Py Python module: a complete and easy way to work with OMEGA/MEX observations Open
Introduction OMEGA-Py [1,2] is a Python 3 module dedicated to the scientific use of data provided by the Observatoire pour la Minéralogie, l’Eau, les Glaces et l’Activité (OMEGA) instrument onboard the ESA Mars Express (MEx) orbiter [3]. I…
View article: Ancient Mars Climate with a polar ocean and ice sheet dynamics
Ancient Mars Climate with a polar ocean and ice sheet dynamics Open
IntroductionThe possibility of an ocean on Mars has been proposed since the 1990’s (e.g. Baker, 1991) with a lot of controversy. Several reviews of the hypothesis of an ancient northern ocean on Mars have be proposed in recent years.These …
View article: Optimal Photometric geometries for a space mission
Optimal Photometric geometries for a space mission Open
- IntroductionUnderstanding the geological processes is a key objective for future lunar exploration. The ESA Màni mission aims to advance this understanding by characterizing the lunar regolith with high resolution imagery, Digital Elevat…
View article: Tracking the CO2 Ice Evolution in Sisyphi Cavi Gullies.
Tracking the CO2 Ice Evolution in Sisyphi Cavi Gullies. Open
Introduction: The planet Mars hosts "gullies" [1] — erosional structures resembling those shaped by liquid water on Earth — mainly at the mid-latitudes, with a higher density in the Southern Hemisphere. While most are dormant, some remain …
View article: Máni an exploration mission for the Moon
Máni an exploration mission for the Moon Open
IntroductionEfforts to quantify lunar surface properties, rover traversability, potential for in-situ resource utilization, or geological processes, all benefit from better optical resolution. The obvious preference for higher resolution i…
View article: Artificial Intelligence in Planetary Science and Astronomy: Applications and Research Potential
Artificial Intelligence in Planetary Science and Astronomy: Applications and Research Potential Open
IntroductionArtificial Intelligence (AI) is one of the most influential fields of the 21st century (Zhang et al., 2021). Rich, E (2019) candidly described it as “the study of how to make computers do things which, at the moment, people do …
View article: Crystalline or Amorphous Ice on Europa? Simulating the Competition Between Surface Processes
Crystalline or Amorphous Ice on Europa? Simulating the Competition Between Surface Processes Open
Intro:Europa’s surface ice exists in a dynamic equilibrium between thermally driven crystallization and radiation-induced amorphization. While thermal crystallization transforms amorphous ice into crystalline phases, energetic particles an…
View article: An analytical specro-photometric model for layered complex planetary surfaces: limitations of the Hapke model and new formulations
An analytical specro-photometric model for layered complex planetary surfaces: limitations of the Hapke model and new formulations Open
IntroductionVisible and near infrared (VNIR) spectroscopy is a widely used and powerfull tool to investigate planetary surfaces. Most minerals or volatile elements making up surfaces have characteristic absorption bands in the range 0.5 μm…
View article: Investigating Iapetus' dichotomy with multi-wavelength microwave observations
Investigating Iapetus' dichotomy with multi-wavelength microwave observations Open
Indubitably, the most dramatic albedo hemispheric dichotomy in the Solar system occurs at Iapetus. Its leading (L) side is covered by an optically low-albedo material, contrasting with its bright trailing (T) side. This dichotomy is also v…
View article: Automatic classification of Martian impact craters using deep learning: a new tool to improve planetary surface dating
Automatic classification of Martian impact craters using deep learning: a new tool to improve planetary surface dating Open
Introduction Impact craters are essential markers for reconstructing the geological history of planetary surfaces [1]. On Mars, where no absolute radiometric dating has yet been conducted in-situ, the density of craters remains the main ch…
View article: Enceladus’ SPT surface and subsurface properties as constrained by Cassini RADAR observations
Enceladus’ SPT surface and subsurface properties as constrained by Cassini RADAR observations Open
Introduction and AbstractThe RADAR onboard Cassini probe (2004-2017), operating in active and passive (or radiometry) mode at 2.2-cm wavelength recorded the backscatter from the surface (through normalized radar backscatter cross section σ…
View article: WARPE: A new tool to simulate radiative transfer and travel-time to characterize planetary surfaces
WARPE: A new tool to simulate radiative transfer and travel-time to characterize planetary surfaces Open
Introduction The next generation of lidar instruments will encompass the full waveform recording, allowing travel-time measurement of each emitted photon packet. This new information will allow finer characterization of planetary surface m…
View article: Enceladus surface properties using Cassini/VIMS hyperspectral data
Enceladus surface properties using Cassini/VIMS hyperspectral data Open
Enceladus is one of the most intriguing icy moons of the solar system, exhibiting active cryovolcanism and continuous plume activity at its south pole [1]. The surface in this region is geologically young and frequently resurfaced by plume…
View article: The Planetary Surfaces Data and Services Centre (PDSSP)
The Planetary Surfaces Data and Services Centre (PDSSP) Open
The Planetary Surfaces Data and Services Centre (PDSSP) is a geospatial data and services center dedicated to studies and research on planetary surfaces. This facility brings together several French research partners in planetology and aim…
View article: Maximising the science return of the Galileo/NIMS dataset using a pixel-based database framework
Maximising the science return of the Galileo/NIMS dataset using a pixel-based database framework Open
The Galileo NIMS data setBetween 1995 and 2003, the NASA Galileo spacecraft explored the Jupiter system, collecting invaluable data on the planet and its moons. Among many instruments, the spacecraft was equipped with the Near-Infrared Map…
View article: Altered lava flows and sulfide controls on the formation of layered deposits in Valles Marineris
Altered lava flows and sulfide controls on the formation of layered deposits in Valles Marineris Open
IntroductionSulfates are abundant at the Martian surface, incorporating sulfur delivered by volcanic eruptions and degassing [1,2]. The thickest sulfate accumulations are found in the interior layered deposits (ILDs) of Valles Marineris. W…
View article: The Blinking Crystallinity of Europa: A Competition between Irradiation and Thermal Alteration
The Blinking Crystallinity of Europa: A Competition between Irradiation and Thermal Alteration Open
The surface of Europa experiences a competition between thermally-induced crystallization and radiation-induced amorphization processes, leading to changes of its crystalline structure. The non-linear crystallization and temperature-depend…
View article: LunaIcy, a Multiphysics Surface Model for the study of icy surfaces
LunaIcy, a Multiphysics Surface Model for the study of icy surfaces Open
Ices are widespread across the solar system, present on the surfaces of nearly all planets and moons. Icy moons, in particular, are of high interest due to their potential habitability, as they can harbor liquid water oceans beneath their …
View article: A Bond albedo map of Europa
A Bond albedo map of Europa Open
Europa’s surface is globally highly reflective, but it shows significant spatial variations in albedo. Accurately estimating Europa’s energy balance would require mapping the surface’s bi-directional reflectance distribution function albed…
View article: Guaranteed Best Sparse Solutions for Spectral Unmixing
Guaranteed Best Sparse Solutions for Spectral Unmixing Open
International audience
View article: Seasonal and Short Timescale Changes on the Martian Surface: Multi-Spacecraft Perspectives
Seasonal and Short Timescale Changes on the Martian Surface: Multi-Spacecraft Perspectives Open
The continued operation of missions such as Mars Express, Mars Reconnaissance Orbiter, and the ExoMars Trace Gas Orbiter has greatly enhanced our knowledge of seasonal processes on Mars. The most apparent evidence of the importance of seas…
View article: Subsurface characterization of Removable Urban Pavements (RUP) using Ground Penetrating Radar (GPR)
Subsurface characterization of Removable Urban Pavements (RUP) using Ground Penetrating Radar (GPR) Open
In the pursuit of improving transport infrastructure as part of the overall sustainable development policy, new coatings and emerging structures are coming to the forefront. This is the case with Removable Urban Pavements (RUP). This new t…
View article: LunaIcy: Exploring Europa’s Icy Surface Microstructure through Multiphysics Simulations
LunaIcy: Exploring Europa’s Icy Surface Microstructure through Multiphysics Simulations Open
A multiphysics simulation model incorporating a sintering model coupled with the MultIHeaTS thermal solver was developed to study the evolution of icy moons’ microstructure. The sintering process is highly dependent on temperature, and thi…
View article: MultIHeaTS: A Fast and Stable Thermal Solver for Multilayered Planetary Surfaces
MultIHeaTS: A Fast and Stable Thermal Solver for Multilayered Planetary Surfaces Open
A fully implicit scheme is proposed for solving the heat equation in 1D heterogeneous media, available as a computationally efficient open-source Python code. The algorithm uses finite differences on an irregular grid and is unconditionall…
View article: Determination of Volumetric Abundance of Intimate Mixture Using Bayesian MCMC
Determination of Volumetric Abundance of Intimate Mixture Using Bayesian MCMC Open
International audience