Matthias Grott
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View article: LunarLeaper—A mission concept to explore the lunar subsurface with a small-scale legged robot
LunarLeaper—A mission concept to explore the lunar subsurface with a small-scale legged robot Open
View article: Science operations of IDEFIX, the MMX Phobos rover
Science operations of IDEFIX, the MMX Phobos rover Open
IDEFIX, a rover to be delivered to the martian moon Phobos, is part of the Martian Moons eXploration (MMX) mission by the Japan Aerospace Exploration Agency, JAXA. MMX will explore both moons of Mars remotely but will also land on Phobos a…
View article: The Lunar Instrumentation for Subsurface Thermal Exploration with Rapidity (LISTER) on Blue Ghost Mission 1 to Mare Crisium. I. Pneumatic Excavation of Regolith
The Lunar Instrumentation for Subsurface Thermal Exploration with Rapidity (LISTER) on Blue Ghost Mission 1 to Mare Crisium. I. Pneumatic Excavation of Regolith Open
The Lunar Instrumentation for Subsurface Thermal Exploration with Rapidity (LISTER) is the first robotically deployed subsurface thermal probe that actively excavates lunar regolith and makes scientific measurements at multiple depths. It …
View article: The miniRAD instrument for the MMX IDEFIX rover
The miniRAD instrument for the MMX IDEFIX rover Open
The miniRAD radiometer is one of the payloads of the Idefix rover on the MMX mission to Phobos. It is a multispectral instrument which measures the infrared radiative flux in six wavelength channels between 4.7 and 100 µm using single-elem…
View article: Unveiling the subsurface extent of the lunar KREEP unit from geodynamic modeling.
Unveiling the subsurface extent of the lunar KREEP unit from geodynamic modeling. Open
Introduction: The Moon has been suggested to have a highly asymmetric volcanic history, with at least three times more volcanic activity recorded on the nearside with respect to the farside [1]. One possible explanation to the asymmetry ha…
View article: The influence of a lunar lander on the temperature of the surrounding surface
The influence of a lunar lander on the temperature of the surrounding surface Open
Introduction: With the possible return of mankind to the Moon comes the need for detailed analyses of ambient conditions in possible landing regions. Several missions (e.g. IM-2, Blue Ghost M1) have already landed in the Moon’s south pole …
View article: The miniRAD Radiometer For The IDEFIX Rover on Martian Moons eXploration
The miniRAD Radiometer For The IDEFIX Rover on Martian Moons eXploration Open
Introduction:The Martian moons exploration, MMX, is JAXA’s sample return mission targeting the two Martian moons Phobos and Deimos and is scheduled to launch in 2026 to return samples from Phobos to Earth in 2031 [1]. The main scientific g…
View article: Proposal for the “Comet Surface Interaction” Mission CoSI
Proposal for the “Comet Surface Interaction” Mission CoSI Open
Introduction and ContextIn response to the European Space Agency’s call for an M-Class Mission (M8), we will propose a mission to rendezvous with a short period, Jupiter-Family Comet to interact with its surface and rehearse a touch-and-go…
View article: VIVA (Venus' Interior, Volcanism and Atmosphere): a Venus mission to reveal unknown interior structure, thermosphere dynamics and meteoroid flux from atmospheric response to seismic waves, volcanic events and external forcings
VIVA (Venus' Interior, Volcanism and Atmosphere): a Venus mission to reveal unknown interior structure, thermosphere dynamics and meteoroid flux from atmospheric response to seismic waves, volcanic events and external forcings Open
Despite being often described as Earth’s sister planet due to a similar distance to the Sun and comparable size, Venus’s internal structure and geodynamic regime, together with its upper atmosphere dynamics and asteroid entry rates, are po…
View article: Detecting volcanic ash of eruption plumes on Venus by imaging in the near infrared windows
Detecting volcanic ash of eruption plumes on Venus by imaging in the near infrared windows Open
Volcanic outgassing shapes the evolution of the atmospheres of terrestrial planets, but is itself affected by the atmospheric pressure (Head and Wilson 1986, Phillips et al. 2001, Gaillard and Scaillet 2014). Outgassing can take place in f…
View article: IDEFIX - The MMX Phobos Rover: One year before launch
IDEFIX - The MMX Phobos Rover: One year before launch Open
IntroductionThe Martian Moon eXploration (MMX) mission by the Japan Aerospace Exploration Agency, JAXA,is going to explore the martian moons Phobos and Deimos. Both moons will be investigated remotely from the mother spacecraft, that will …
View article: Low thermal inertia of (162173) Ryugu a result of horizontal cracks in boulders
Low thermal inertia of (162173) Ryugu a result of horizontal cracks in boulders Open
View article: Mars Soil Temperature and Thermal Properties From InSight HP3 ${\mathrm{H}\mathrm{P}}^{3}$ Data
Mars Soil Temperature and Thermal Properties From InSight HP3 ${\mathrm{H}\mathrm{P}}^{3}$ Data Open
Diurnal and seasonal variations in soil and surface temperature measured with the thermal probe and radiometer of NASA's InSight Mars mission are reported. At a representative depth of 10–20 cm, an average temperature of 217.5 K was found,…
View article: Thermal and mechanical properties of carbonaceous chondrite analogues
Thermal and mechanical properties of carbonaceous chondrite analogues Open
Thermal and mechanical properties of carbonaceous chondrite analoguesBackgroundAs small bodies with the most similar elemental abundance compared to the solar photosphere (Lodders et al., 2009), C-type asteroids are of great interest for s…
View article: A numerical method to determine bulk thermal conductivity of randomly packed particle beds
A numerical method to determine bulk thermal conductivity of randomly packed particle beds Open
Introduction: The Hayabusa2 mission [1] investigated the near-Earth asteroid (162173) Ryugu by remote sensing and in-situ measurements. A comprehensive analysis of the asteroid’s thermophysical properties [2] revealed a discrepancy b…
View article: Numerical Model of Reduction of Apparent Thermal Inertia by Interrupted Vertical Heat-Flow
Numerical Model of Reduction of Apparent Thermal Inertia by Interrupted Vertical Heat-Flow Open
Introduction: The JAXA Hayabusa2 sample return mission investigated asteroid (162173) Ryugu via remote sensing (Tsuda et al., 2013, Watanabe et al., 2019), deployed the DLR/CNES MASCOT (Ho et al., 2021), performed an artificial impact expe…
View article: CALICO - a Mission Proposal to Explore Ceres In Situ
CALICO - a Mission Proposal to Explore Ceres In Situ Open
The Ceres Autonomous Lander Into Crater Occator (CALICO) was proposed in response to ESA’s M7-call for future space missions. CALICO is a mission to study the surface and interior of dwarf planet Ceres, the closest ocean world to Ear…
View article: Optical Design of a Miniaturized Laser Altimeter Implementing Single-Photon Counting Detection for Topographic Mapping using Small Satellites
Optical Design of a Miniaturized Laser Altimeter Implementing Single-Photon Counting Detection for Topographic Mapping using Small Satellites Open
Over recent decades, laser altimeters have been an essential tool in planetary exploration, enabling precise topographic characterisation of planetary bodies within the Solar System [1]. The working principle of this type of topographic me…
View article: Lunarleaper – Unlocking a Subsurface World
Lunarleaper – Unlocking a Subsurface World Open
We present LunarLeaper, a robotic explorer concept in response to the ESA 2023 Small Missions call. Pits, volcanic collapse features with near-vertical walls, have been identified across the lunar and Martian surface. These pits are high p…
View article: IDEFIX, the MMX Rover – in-situ science on Phobos
IDEFIX, the MMX Rover – in-situ science on Phobos Open
IDEFIX is a small rover, contributed by the Centre National d’Etudes Spatiales (CNES) and the German Aerospace Center (DLR) to JAXA´s Martian Moons eXploration (MMX) mission which will investigate the Martian moons Phobos and Deimos [1,2].…
View article: Investigating the Martian soil at the InSight landing site
Investigating the Martian soil at the InSight landing site Open
The InSight mission is a geophysical mission aimed at better understanding the structure of Mars and of the other rocky planets of the solar system. To do so, a lander accommodating two cameras, a very sensitive seismometer, and a dynamic …
View article: LunarLeaper - A Mission Concept to Explore the Lunar Subsurface with a Small-Scale Legged Robot
LunarLeaper - A Mission Concept to Explore the Lunar Subsurface with a Small-Scale Legged Robot Open
View article: Science objectives of the MMX rover
Science objectives of the MMX rover Open
View article: MASCOT’s in situ analysis of asteroid Ryugu in the context of regolith samples and remote sensing data returned by Hayabusa2
MASCOT’s in situ analysis of asteroid Ryugu in the context of regolith samples and remote sensing data returned by Hayabusa2 Open
View article: Seasonal Variations of Soil Thermal Conductivity at the InSight Landing Site
Seasonal Variations of Soil Thermal Conductivity at the InSight Landing Site Open
The heat flow and physical properties package measured soil thermal conductivity at the landing site in the 0.03–0.37 m depth range. Six measurements spanning solar longitudes from 8.0° to 210.0° were made and atmospheric pressure at the s…
View article: Macromolecular organic matter in samples of the asteroid (162173) Ryugu
Macromolecular organic matter in samples of the asteroid (162173) Ryugu Open
Samples of the carbonaceous asteroid (162173) Ryugu were collected and brought to Earth by the Hayabusa2 spacecraft. We investigated the macromolecular organic matter in Ryugu samples and found that it contains aromatic and aliphatic carbo…
View article: Seasonal Variations of Soil Thermal Conductivity at the InSight Landing Site
Seasonal Variations of Soil Thermal Conductivity at the InSight Landing Site Open
The heat flow and physical properties package measured soil thermal conductivity at the landing site in the 0.03 to 0.37 m depth range. Six measurements spanning solar longitudes from 8.0$^\circ$ to 210.0$^\circ$ were made and atmospheric …
View article: In Situ Regolith Seismic Velocity Measurement at the InSight Landing Site on Mars
In Situ Regolith Seismic Velocity Measurement at the InSight Landing Site on Mars Open
Interior exploration using Seismic Investigations, Geodesy and Heat Transport's (InSight) seismometer package Seismic Experiment for Interior Structure (SEIS) was placed on the surface of Mars at about 1.2 m distance from the thermal prope…
View article: Using the HP3 mole on InSight to probe the thermal and mechanical properties of the Martian regolith 
Using the HP3 mole on InSight to probe the thermal and mechanical properties of the Martian regolith  Open
<p>The NASA InSight Lander on Mars includes the Heat Flow and Physical Properties Package HP<sup>3</sup> (see Spohn et al. (2018) for a description of the package) to measure the surface heat flow of the planet. The packa…
View article: Characterization of the MASCOT landing area by Hayabusa2
Characterization of the MASCOT landing area by Hayabusa2 Open
Context. After landing on C-type asteroid Ryugu, MASCOT imaged brightly colored, submillimeter-sized inclusions in a small rock. Hayabusa2 successfully returned a sample of small particles from the surface of Ryugu, but none of these appea…