A. Olivieri
A5103111278- Astro and Planetary Science
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Atmospheric Ozone and Climate
- Space Exploration and Technology
- Ionosphere and magnetosphere dynamics
- Stellar, planetary, and galactic studies
- Spacecraft and Cryogenic Technologies
- Solar and Space Plasma Dynamics
- Management, Economics, and Public Policy
- Atmospheric and Environmental Gas Dynamics
- Gamma-ray bursts and supernovae
- Space exploration and regulation
- Geology and Paleoclimatology Research
- Geophysics and Gravity Measurements
- Distributed and Parallel Computing Systems
- Calibration and Measurement Techniques
- Spacecraft Design and Technology
- Diverse academic and cultural studies
- Mineral Processing and Grinding
- Nuclear Physics and Applications
- Earthquake Detection and Analysis
- Aerospace Engineering and Energy Systems
- Geotechnical and Geomechanical Engineering
- Target Tracking and Data Fusion in Sensor Networks
Agenzia Spaziale Italiana
2014-2024
Moons drive structure in Jupiter's aurorae Like Earth, Jupiter has generated by energetic particles hitting its atmosphere. Those incoming can come from moons Io and Ganymede. Mura et al. used infrared observations the Juno spacecraft to image moon-generated aurorae. The pattern induced showed an alternating series of spots, reminiscent vortices, sometimes split into two arcs. Aurorae related Ganymede could also show a double structure. Although cause these unexpected features remains...
Abstract The Mercury Orbiter Radio Science Experiment (MORE) of the ESA mission BepiColombo will provide an accurate estimation Mercury’s gravity field and rotational state, improved tests general relativity, a novel deep space navigation system. key experimental setup entails highly stable, multi-frequency radio link in X Ka band, enabling two-way range rate measurements 3 micron/s at nearly all solar elongation angles. In addition, high chip rate, pseudo-noise ranging system has already...
Abstract The Jovian Infrared Auroral Mapper (JIRAM) is an imager/spectrometer on board NASA/Juno mission for the study of aurorae. first results JIRAM's imager channel observations H 3 + infrared emission, collected around Juno perijove, provide excellent spatial and temporal distribution aurorae, show morphology main ovals, polar regions, footprints Io, Europa Ganymede. extended Io “tail” persists ~3 h after passage satellite flux tube. Multi‐arc structures varied extent appear in both...
Abstract We present wind speeds at the ~ 1 bar level both Jovian polar regions inferred from 5‐μm infrared images acquired by Jupiter InfraRed Auroral Mapper (JIRAM) instrument on National Aeronautics and Space Administration Juno spacecraft during its fourth periapsis (2 February 2017). adopted criterion of minimum mean absolute distortion (Gonzalez & Woods, 2008) to quantify motion cloud features between pairs images. The associated random error speed estimates is 12 m/s in northern...
Abstract The spatial distribution of water, ammonia, phosphine, germane, and arsine in the Jupiter's troposphere has been inferred from Jovian Infrared Auroral Mapper (JIRAM) Juno data. Measurements allow us to retrieve vertically averaged concentration gases between ~3 5 bars infrared‐bright spectra. Results were used create latitudinal profiles. water vapor relative humidity varies with latitude <1% over 15%. At intermediate latitudes (30–70°) maxima are associated location cyclonic...
Abstract The Jupiter InfraRed Auroral Mapper (JIRAM) aboard Juno observed the Jovian South Pole aurora during first orbit of mission. H 3 + (trihydrogen cation) and CH 4 (methane) emissions have been identified measured. observations carried out in nadir slant viewing both by a L‐filtered imager 2–5 μm spectrometer. Results from spectral analysis all taken over instrument are reported. coverage southern these measurements has partial, but sufficient to determine different regions temperature...
Abstract The Jupiter InfraRed Auroral Mapper (JIRAM) instrument on board the Juno spacecraft performed observations of two bright hot spots around time first pericenter passage 27 August 2016. spectra acquired in 4–5 µm spectral range were analyzed to infer residual opacities uppermost cloud deck as well mean mixing ratios water, ammonia, and phosphine at approximate level few bars. Our results support current view regions prevailing descending vertical motions atmosphere but extend this...
Mercury's southern inner magnetosphere is an unexplored region as it was not observed by earlier space missions. In October 2021, BepiColombo mission has passed through this during its first Mercury flyby. Here, we describe the observations of SERENA ion sensors nearby and inside magnetosphere. An intermittent high-energy signal, possibly due to interplanetary magnetic flux rope, been downstream Mercury, together with low energy solar wind. Low ions, satellite outgassing, were detected...
Abstract During the first orbit around Jupiter of NASA/Juno mission, Jovian Auroral Infrared Mapper (JIRAM) instrument observed auroral regions with a large number measurements. The measured spectra show both emission ion and methane in 3–4 μm spectral region. In this paper we describe analysis method developed to retrieve temperature column density (CD) from JIRAM northern high spatial resolution shows an asymmetric aurora, CD ovals not superimposed exactly located where models previous...
Abstract During the first perijove passage of Juno mission, Jovian InfraRed Auroral Mapper (JIRAM) observed a line closely spaced oval features in Jupiter's southern hemisphere, between 30°S and 45°S. In this work, we focused on longitudinal region covering three ovals having higher contrast at 5 μm, i.e., 120°W 60°W System III coordinates. We used JIRAM's full spectral capability range 2.4–3 μm together with Bayesian data inversion approach to retrieve maps column densities altitudes for an...
Abstract Throughout the first orbit of NASA Juno mission around Jupiter, Jupiter InfraRed Auroral Mapper (JIRAM) targeted northern and southern polar regions several times. The analyses acquired images spectra confirmed a significant presence methane (CH 4 ) near both poles through its 3.3 μm emission overlapping H 3 + auroral feature at 3.31 μm. Neither acetylene (C 2 nor ethane 6 have been observed so far. analysis method, developed for retrieval temperature abundances applied to...
Abstract In this work, we present the detection of CH 4 and emissions in equatorial atmosphere Jupiter as two well‐separated layers located, respectively, at tangent altitudes about 200 500–600 km above 1‐bar level using observations Jovian InfraRed Auroral Mapper (JIRAM), on board Juno. This provides details vertical distribution retrieving its Volume Mixing Ratio (VMR), concentration, temperature. The thermal profile obtained from shows a peak 600–800 K 550 km, with lower values than ones...
Abstract We present a power spectral analysis of two narrow annular regions near Jupiter's South Pole derived from data acquired by the Jovian Infrared Auroral Mapper instrument onboard NASA's Juno mission. In particular, our focuses on set M‐band imager (hereafter IMG‐M) that probes thermal emission in window centered at 4.8 μm. analyze densities circular paths outside and inside cyclones images during six perijoves. The typical spatial resolution is around 55 km pixel −1 . limited to...
ABSTRACT We analyse spectra measured by the Jovian Infrared Auroral Mapper (JIRAM, a payload element of NASA Juno mission) in 3150–4910 cm−1 (2.0–3.2 μm) range during perijiove passage 2016 August. Despite modelling uncertainties, quality and relative uniformity data set allow us to determine several parameters characterizing Jupiter’s upper troposphere latitude 35°S–30°N. Ammonia humidity at 500 millibars varies between 5 per cent supersaturation beyond 100 for about 3 processed spectra....