A5062876996- Geophysical Methods and Applications
- Planetary Science and Exploration
- Astro and Planetary Science
- Seismic Waves and Analysis
- Geophysical and Geoelectrical Methods
- Soil Moisture and Remote Sensing
- Microwave Imaging and Scattering Analysis
- Scientific Research and Discoveries
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Landslides and related hazards
- Cryospheric studies and observations
- Underwater Acoustics Research
- Space Exploration and Technology
- Space Science and Extraterrestrial Life
- Image Processing and 3D Reconstruction
- Arctic and Antarctic ice dynamics
- Earthquake Detection and Analysis
- Climate change and permafrost
- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Magnetic and Electromagnetic Effects
- Seismic Imaging and Inversion Techniques
- Microwave and Dielectric Measurement Techniques
- Rock Mechanics and Modeling
Roma Tre University
2015-2024
Università degli Studi Internazionali di Roma
2018
Università degli Studi della Tuscia
2007-2015
Sapienza University of Rome
1994-2011
Institut d'Électronique et des Technologies du numéRique
2011
Université de Rennes
2011
Centre National de la Recherche Scientifique
2011
University of Padua
2010
Southwest Research Institute
2008
Massachusetts Institute of Technology
2008
The presence of liquid water at the base Martian polar caps has long been suspected but not observed. We surveyed Planum Australe region using Mars Advanced Radar for Subsurface and Ionosphere Sounding, a low-frequency radar on Express spacecraft. profiles collected between May 2012 December 2015, contain evidence trapped below ice South Polar Layered Deposits. Anomalously bright subsurface reflections were found within well-defined, 20km wide zone centered 193°E, 81°S, surrounded by much...
The martian subsurface has been probed to kilometer depths by the Mars Advanced Radar for Subsurface and Ionospheric Sounding instrument aboard Express orbiter. Signals penetrate polar layered deposits, probably imaging base of deposits. Data from northern lowlands Chryse Planitia have revealed a shallowly buried quasi-circular structure about 250 kilometers in diameter that is interpreted be an impact basin. In addition, planar reflector associated with basin may indicate presence low-loss...
The Shallow Radar (SHARAD) on the Mars Reconnaissance Orbiter has imaged internal stratigraphy of north polar layered deposits Mars. reflections within reveal a laterally continuous deposition layers, which typically consist four packets finely spaced reflectors separated by homogeneous interpacket regions nearly pure ice. packet/interpacket structure can be explained approximately million-year periodicities in Mars' obliquity or orbital eccentricity. observed 100-meter maximum deflection...
On 3 January 2019, China's Chang'E-4 (CE-4) successfully landed on the eastern floor of Von Kármán crater within South Pole-Aitken Basin, becoming first spacecraft in history to land Moon's farside. Here, we report observations made by Lunar Penetrating Radar (LPR) onboard Yutu-2 rover during two lunar days. We found a signal penetration at CE-4 landing site that is much greater than CE-3 site. The LPR images provide clear information about structure subsurface, which primarily low-loss,...
The search for evidence of past or present life on Mars is the principal objective 2020 ESA-Roscosmos ExoMars Rover mission. If such to be found anywhere, it will most likely in subsurface, where organic molecules are shielded from destructive effects ionizing radiation and atmospheric oxidants. For this reason, mission has been optimized investigate subsurface identify, understand, sample those locations conditions preservation found. Water Ice Subsurface Deposit Observation (WISDOM)...
Mars' polar regions are covered with ice-rich layered deposits that potentially contain a record of climate variations. The sounding radar SHARAD on the Mars Reconnaissance Orbiter mapped detailed subsurface stratigraphy in Promethei Lingula region south plateau, Planum Australe. Radar reflections interpreted as layers correlated across adjacent orbits and continuous for up to 150 kilometers along spacecraft orbital tracks. reflectors often separated into discrete reflector sequences, strong...
The identification of the physical nature an object or target causing a ground-penetrating radar (GPR) anomaly, as well estimation target's dimensions and geometry, is rather challenging. To improve identification, basic studies are still required, they can be addressed primarily using laboratory- field-based model. field model (test site) usually expensive difficult to build, but it provides data for controlled properties geometry from natural environment that essential testing processing...
High-frequency electromagnetic (EM) surveys have shown to be valuable techniques in the study of soil water content due strong dependence dielectric permittivity with moisture content. This quantity can determined by analyzing average value early-time instantaneous amplitude ground-penetrating radar (GPR) traces. We demonstrate reliability this approach evaluate shallow variations from standard fixed-offset GPR data simulating over different likely EM conditions. A linear dipole model that...
Chang'e-3 (CE-3) has been the first spacecraft to soft land on moon since Soviet Union's Luna 24 in 1976. The arrived at Mare Imbrium December 14, 2013, and same day, Yutu lunar rover separated from lander start its exploration of surface subsurface around landing site. was equipped, among other instruments, with two penetrating radar systems having a working frequency 60 500 MHz. radars acquired data for about weeks while slowly moving along path 114 m. At navigation point N0209, got...
We studied fault scarps along the northern sector of Celano–L'Aquila system in Abruzzi region (central Apennines). Up to ∼9.5 km long, 3 m high, scarp traces mark slope foot ridgetop valleys at Mt Ocre range. In order provide direct evidence deformation history these scarps, we initiated geomorphic, ground-penetrating radar (GPR) and trenching investigations. GPR investigations yielded subsurface stratigraphic features zones, determined locations for sites. A total five trenches were...
We explore a new approach to evaluate the effect of soil electromagnetic parameters on early-time ground-penetrating radar (GPR) signals. The analysis is performed in time interval which contains direct airwaves and ground waves, propagating between transmitting receiving antennas. To perform measurements we have selected natural test site characterized by very strong lateral gradient electrical properties. subsoil permittivity conductivity response compare envelope amplitude GPR signals...
Geophysical techniques can be effectively applied to produce an image of buried targets in a host medium, through the detection ‘boundaries’ between materials having different values specific physical property. Over last 30 years these methods have been increasingly used detect presence archaeological ruins subsurface, thus reducing extensive, destructive, time consuming and expensive excavations. Recently, ground penetrating radar (GPR) has become most important technique investigations...
The ground penetrating radar (GPR) technique was tested in Pompeii, an unexplored area where the Roman ruins are partially buried volcanic deposits. method also combined with time domain reflectometry (TDR) measurements to estimate dielectric properties of different units. In spite total thickness covering materials and high signal attenuation measured some layers, able show a detailed image sediments locate manmade structures hidden ash Moreover, present study shows that integrated use GPR...
It has been recently demonstrated that the early‐time portion of ground‐penetrating radar (GPR) signal, consisting direct air and ground wave events, is dependent on shallow subsurface bulk electromagnetic properties material; these are strongly controlled by water content in this material. While several experiments have conducted to study effects variations antenna–material coupling, they considered a limited range moisture soil textures. Furthermore, those previous did not consider highly...
This paper presents the Radar for Icy Moon Exploration (RIME) that is a fundamental payload in Jupiter Explorer (JUICE) mission of European Space Agency (ESA). RIME radar sounder aimed to study subsurface Jupiter's icy moons Ganymede, Europa and Callisto. The illustrates main goals RIME, its architecture parameters some recent advances design.
Knowledge of the physical and thermal properties South Polar Layer Deposits (SPLD) is key to constrain source bright basal reflections at Ultimi Scopuli detected by MARSIS (Mars Advanced Radar for Subsurface Ionosphere Sounding) radar sounder. Here we present a detailed analysis attenuation, based on data acquired 3, 4, 5 MHz. We show that attenuation frequency dependent, its behavior consistent throughout entire region. This suggests SPLD are compositionally homogeneous Scopuli, our results...
A study on the electromagnetic propagation in various models of Martian subsurface is performed with a relevance to ground penetrating radar (GPR) operating onboard rover missions. Measurements properties Mars soil simulants are obtained; this basis, attenuation features GPR signals estimated, including both electric and magnetic losses. The effect inhomogeneities inside also taken into account by means specific model randomly distributed scatterers. performance terms resolution maximum...
Recently, various studies have been carried out in order to address the possible relationships between amplitude attributes of "first-arrival direct wave" (the so-called "early-time signal," ETS), propagating at interface bistatic ground-penetrating radar (GPR) configurations, and relevant shallow-soil permittivity parameters (dielectric constant conductivity). In this frame, ad hoc compared numerical analyses experimental investigations are extensively developed discussed here, with aim...
GPR investigations has been collected in Pompeii, an area of the regio III not yet fully excavated. In this area, as many other parts roman city, large portions archaeological features are still buried under thick volcanic deposits. The radar survey conducted on top a long scarp parallel to Nola Street. This site was chosen because some remains well visible front scarp, so they can be use calibrate sections. results allowed us reconstruct subsurface structure and locate main ruins Moreover,...