A5065319312- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Planetary Science and Exploration
- Geophysics and Gravity Measurements
- Space Exploration and Technology
- Magnetic confinement fusion research
- Atmospheric Ozone and Climate
- Earthquake Detection and Analysis
- Stellar, planetary, and galactic studies
- Spacecraft and Cryogenic Technologies
- Geophysics and Sensor Technology
- Tropical and Extratropical Cyclones Research
- Spacecraft Design and Technology
- Cryptographic Implementations and Security
- Cardiovascular Health and Disease Prevention
- Solar Radiation and Photovoltaics
- Cardiovascular Disease and Adiposity
Technische Universität Braunschweig
2018-2024
Goddard Space Flight Center
2023
Institut de Recherche en Astrophysique et Planétologie
2022
Université Toulouse III - Paul Sabatier
2022
Centre National de la Recherche Scientifique
2022
Abstract On 2022 February 15, an impressive filament eruption was observed off the solar eastern limb from three remote-sensing viewpoints, namely, Earth, STEREO-A, and Solar Orbiter. In addition to representing most-distant at extreme ultraviolet wavelengths—captured by Orbiter's field of view extending above 6 R ⊙ —this event also associated with release a fast (∼2200 km s −1 ) coronal mass ejection (CME) that directed toward BepiColombo Parker Probe. These two probes were separated 2° in...
Abstract The magnetometer instrument MPO-MAG on-board the Mercury Planetary Orbiter (MPO) of BepiColombo mission en-route to is introduced, with its design, calibration and scientific targets. comprised two tri-axial fluxgate magnetometers mounted on a 2.9 m boom are 0.8 apart. They monitor magnetic field up 128 Hz in $\pm 2048$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>±</mml:mo> <mml:mn>2048</mml:mn> </mml:math> nT range. MPO will be injected into an initial $480...
Context. A complex and long-lasting solar eruption on 17 April 2021 produced a widespread energetic particle (SEP) event that was observed by five longitudinally well-separated observers in the inner heliosphere covered distances to Sun from 0.42 1 au: BepiColombo, Parker Solar Probe, Orbiter, STEREO A, near-Earth spacecraft. The second SEP detected cycle 25, it relativistic electrons protons. It associated with hard X-ray flare showed multiple peaks over duration of one hour. further...
Abstract On 2022 February 15–16, multiple spacecraft measured one of the most intense solar energetic particle (SEP) events observed so far in Solar Cycle 25. This study provides an overview interesting observations made by during this event. Parker Probe (PSP) and BepiColombo were close to each other at 0.34–0.37 au (a radial separation ∼0.03 au) as they impacted flank associated coronal mass ejection (CME). At about 100° retrograde direction 1.5 away from Sun, radiation detector on board...
Abstract In preparation for the ESA/JAXA BepiColombo mission to Mercury, thematic working groups had been established coordinating activities within Science Working Team in specific fields. Here we describe scientific goals of Geodesy and Geophysics Group (GGWG) that aims at addressing fundamental questions regarding Mercury’s internal structure evolution. This multidisciplinary investigation will also test gravity laws by using planet Mercury as a proof mass. The instruments on Planetary...
Abstract To first order, the magnetopause (MP) is defined by a pressure balance between solar wind and magnetosphere. The boundary moves under influence of varying conditions transient foreshock phenomena, reaching unusually large small distances from Earth. We investigate which such extreme MP distortions occur. Therefore, we construct database crossings (MPCs) observed THEMIS spacecraft in years 2007 to mid‐2022 using simple Random Forest Classifier. Roughly 7% found crossing events...
Abstract The interaction of a solar wind discontinuity with the backstreaming particles Earth’s ion foreshock can generate hot, tenuous plasma transients such as bubbles (FB) and hot flow anomalies (HFA). These are known to have strong effects on magnetosphere, distorting magnetopause (MP), either locally during HFAs or globally FBs. However, previous studies global impact FBs not been able determine whether response stems directly from transverse scale size phenomenon its fast motion over...
Abstract On 10 August 2021, the Mercury-bound BepiColombo spacecraft performed its second fly-by of Venus and provided a short-lived observation induced magnetosphere. Here we report results recorded by Mass Spectrum Analyzer on board Mio, which reveal presence cold O + C with an average total flux ~4 ± 1 × 4 cm −2 s −1 at distance about six planetary radii in region that has never been explored before. The ratio escaping to is most 0.31 0.2, implying that, addition atomic ions, CO group...
Abstract. Transient enhancements in the dynamic pressure, so-called magnetosheath jets or simply jets, are abundantly found magnetosheath. They travel from bow shock through towards magnetopause. On their way magnetosheath, disturb ambient plasma. Multiple studies already investigated scale size perpendicular to propagation direction, and almost exclusively a statistical manner. In this paper, we use multi-point measurements Time History of Events Macroscale Interactions during Substorms...
Abstract The second Venus flyby of the BepiColombo mission offer a unique opportunity to make complete tour one few gas-dynamics dominated interaction regions between supersonic solar wind and Solar System object. spacecraft pass through full Venusian magnetosheath following plasma streamlines, cross subsolar stagnation region during very stable conditions as observed upstream by neighboring Orbiter mission. These rare multipoint synergistic observations experimentally confirm what was...
Abstract. Recently the two-spacecraft mission BepiColombo launched to explore plasma and magnetic field environment of Mercury. Both spacecraft, Mercury Planetary Orbiter (MPO) Magnetospheric (MMO, also referred as Mio), are equipped with fluxgate magnetometers, which have proven be well-suited measure in space high precision. Nevertheless, accurate measurements require proper in-flight calibration. In particular magnetometer offset, relates relative readings into an absolute value, needs...
Abstract. This study analyzes the flux transfer event (FTE)-type ropes and magnetic reconnection around dayside magnetopause during BepiColombo's Earth flyby. The magnetosheath has a high plasma β (∼ 8), interplanetary field (IMF) significant radial component. Six are identified magnetopause. motion of together with maximum shear model suggests that X-line possibly swipes BepiColombo near equator due to an increase in component IMF. rope highest content contains clear coalescence signature,...
Abstract The magnetotail configuration includes a northern tail lobe, southern and plasma sheet when IMF directs southward, as result of the Dungey cycle. However, it is little known about for northward (NIMF) conditions. Using in situ data corresponding simulations, we show that forms into dawnside lobe duskside under NIMF with significant By shows signatures related to reconnection such Cusp may form dawn‐dusk its version Simulation results also aurora transpolar arc be caused by process...
Abstract. Different magnetopause models with a diverse level of complexity are in use. One thing that they have common is mainly based on near-earth observations; i.e. use measurements at distances about ±10 Earth radii along the GSM x axis. Only very few observations crossings larger used for model fitting. In this study we compare position and normal direction predictions Shue et al. (1997) actual identified using ARTEMIS spacecraft lunar distance, 60 radii. We find differences location...
Abstract Distributions of plasma and magnetic pressures are the basic information to investigate macroscopic dynamics Earth's magnetosphere. Several studies have been made on instabilities in However, correlation between pressure variations has not statistically investigated. In this paper, we analyze statistical characteristics phase relationships at frequencies 4–15 mHz using 2 years THEMIS‐E satellite data nightside Spectral peaks with coherence greater than 0.85 for 1‐hr time segments...
Abstract. Out of the two Venus flybys that BepiColombo uses as a gravity assist manoeuvre to finally arrive at Mercury, first took place on 15 October 2020. After passing bow shock, spacecraft travelled along induced magnetotail, crossing it mainly in YVSO direction. In this paper, Mercury Planetary Orbiter Magnetometer (MPO-MAG) data are discussed, with support from three other plasma instruments: Ion Camera (SERENA-PICAM) SERENA suite, Electron Analyser (MEA), and Radiation Monitor (BERM)....
Abstract. Multi-spacecraft data from the years 2008 to 2015 of THEMIS mission particularly in near-Earth plasma sheet are used order empirically determine polytropic index quiet and active time magnetotail. The results a number previous studies 1990s can be confirmed. An analysis total database, although showing poor correlation, an average γ = 1. 72. is well correlated with 49. However, scattering suggests that not adequate. In reduce timescales, individual spacecraft orbits analyzed,...
On 2022 February 15, an impressive filament eruption was observed off the solar eastern limb from three remote-sensing viewpoints, namely Earth, STEREO-A, and Solar Orbiter. In addition to representing most-distant at extreme ultraviolet wavelengths -- captured by Orbiter's field of view extending above 6 $R_{\odot}$ this event also associated with release a fast ($\sim$2200 km$\cdot$s$^{-1}$) coronal mass ejection (CME) that directed towards BepiColombo Parker Probe. These two probes were...
Transient enhancements in the dynamic pressure, so-called magnetosheath jets or simply jets, are abundant magnetosheath.They propagate from bow shock towards magnetopause. On their way through magnetosheath, interact with theambient plasma. The scale size of is determined almost exclusively statistical studies, but not for individual jet events.We use multipoint measurements Time History Events and Macroscale Interactions during Substorms (THEMIS) missionto study passage a single obtain its...
We analyze data from multiple flybys by the Solar Orbiter, BepiColombo, and Parker Probe (PSP) missions to study interaction between Venus' plasma environment solar wind forming induced magnetosphere. Through examination of magnetic field density signatures we characterize spatial extent dynamics magnetotail, focusing mainly on boundary crossings. Notably, observe significant differences in crossing location appearance flybys, highlighting dynamic nature magnetotail. In particular, during...
To first order, the magnetopause (MP) is defined by a pressure balance between solar wind and magnetosphere. The boundary moves under influence of varying conditions transient foreshock phenomena, reaching unusually large small distances from Earth. We investigate which such extreme MP distortions occur. Therefore, we construct database crossings (MPCs) observed THEMIS spacecraft in years 2007 to mid-2022 using simple Random Forest Classifier. Roughly 7% found crossing events deviate beyond...
Context. Magnetic holes are ubiquitous structures in the solar wind and planetary magnetosheaths. They consist of a strong depression magnetic field strength, most likely pressure balance through increased plasma pressure, which is convected with flow. These created temperature anisotropy, where perpendicular (with respect to field) greater than parallel temperature. The occurrence rate these between Earth Mercury can give us information about how conditions develop on their way from Sun...
The interaction of a solar wind discontinuity with the backstreaming particles Earth’s ion foreshock can generate hot, tenuous plasma transients such as bubbles (FB) and hot flow anomalies (HFA). These are known to have strong effects on magnetosphere, distorting magnetopause (MP), either locally during HFAs or globally FBs. However, previous studies global impact FBs not been able determine whether response stems directly from transverse scale size phenomenon its fast motion over...