A5029221905- Ionosphere and magnetosphere dynamics
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Magnetic Field Sensors Techniques
- Atomic and Subatomic Physics Research
- Inertial Sensor and Navigation
- Planetary Science and Exploration
- Seismic Waves and Analysis
- earthquake and tectonic studies
- Geophysics and Sensor Technology
- Quantum optics and atomic interactions
- Geophysical and Geoelectrical Methods
- Dark Matter and Cosmic Phenomena
- Magnetic confinement fusion research
- Stellar, planetary, and galactic studies
- Cold Atom Physics and Bose-Einstein Condensates
- GNSS positioning and interference
- Plasma Diagnostics and Applications
- Sensor Technology and Measurement Systems
- Atmospheric Ozone and Climate
- Seismology and Earthquake Studies
- Advanced Frequency and Time Standards
Space Research Institute
2015-2024
Austrian Academy of Sciences
2015-2024
Czech Academy of Sciences, Institute of Geophysics
2023
National Space Science Center
2022
Chinese Academy of Sciences
2022
Institute of Experimental Physics of the Slovak Academy of Sciences
2022
University of Chinese Academy of Sciences
2022
University of Bari Aldo Moro
2020
China Earthquake Administration
2020
Laboratoire atmosphères, milieux, observations spatiales
2020
The success of the Magnetospheric Multiscale mission depends on accurate measurement magnetic field all four spacecraft. To ensure this success, two independently designed and built fluxgate magnetometers were developed, avoiding single-point failures. dubbed digital (DFG), which uses an ASIC implementation was supplied by Space Research Institute Austrian Academy Sciences analogue magnetometer (AFG) with a more traditional circuit board design University California, Los Angeles. A stringent...
Abstract In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted thirteenth generation Geomagnetic Reference Field (IGRF). This IGRF updates previous with a definitive main field model for epoch 2015.0, 2020.0, predictive linear secular variation 2020.0 to 2025.0. letter provides equations defining IGRF, spherical harmonic coefficients this model, maps magnetic declination, inclination total intensity their predicted rate...
Magnetic reconnection is a fundamental physical process in plasmas whereby stored magnetic energy converted into heat and kinetic of charged particles. Reconnection occurs many astrophysical plasma environments laboratory plasmas. Using measurements with very high time resolution, NASA's Magnetospheric Multiscale (MMS) mission has found direct evidence for electron demagnetization acceleration at sites along the sunward boundary Earth's magnetosphere where interplanetary field reconnects...
The FIELDS instrumentation suite on the Magnetospheric Multiscale (MMS) mission provides comprehensive measurements of full vector magnetic and electric fields in reconnection regions investigated by MMS, including dayside magnetopause night-side magnetotail acceleration out to 25 Re. Six sensors each four MMS spacecraft provide overlapping these with sensitive cross-calibrations both before after launch. consist redundant flux-gate magnetometers (AFG DFG) over frequency range from DC 64 Hz,...
Whistler mode chorus waves are receiving increased scientific attention due to their important roles in both acceleration and loss processes of radiation belt electrons. A new global survey whistler‐mode is performed using magnetic field filter bank data from the THEMIS spacecraft with 5 probes near‐equatorial orbits. Our results confirm earlier analyses strong dependence wave amplitudes on geomagnetic activity, confinement nightside emissions low latitudes, extension dayside high latitudes....
Abstract The tri-axial search-coil magnetometer (SCM) belongs to the FIELDS instrumentation suite on Magnetospheric Multiscale (MMS) mission (Torbert et al. in Space Sci. Rev. (2014), this issue). It provides three magnetic components of waves from 1 Hz 6 kHz particular key regions Earth’s magnetosphere namely subsolar region and magnetotail. plasmas being collisionless, such a measurement is crucial as electromagnetic are thought provide way ensure conversion thermal kinetic energies...
The magnetometer instrument on the Solar Orbiter mission is designed to measure magnetic field local spacecraft continuously for entire duration. need characterise not only background but also its variations scales from far above well below proton gyroscale result in challenging requirements stability, precision, and noise, as operational limitations both other instruments. vibration thermal environment has led significant development of mechanical sensor design. overall design, performance,...
Abstract The four Magnetospheric Multiscale (MMS) spacecraft recorded the first direct evidence of reconnection exhausts associated with Kelvin‐Helmholtz (KH) waves at duskside magnetopause on 8 September 2015 which allows for local mass and energy transport across flank magnetopause. Pressure anisotropy‐weighted Walén analyses confirmed in‐plane 22 42 KH‐related trailing current sheets (CSs). Twenty‐one jets were observed by all spacecraft, small variations in ion velocity, along same...
Abstract The role and properties of lower hybrid waves in the ion diffusion region magnetospheric inflow asymmetric reconnection are investigated using Magnetospheric Multiscale (MMS) mission. Two distinct groups observed region, which have propagate opposite directions along magnetopause. One group develops near edge inflow, where magnetosheath ions enter magnetosphere through finite gyroradius effect driven by ion‐ion cross‐field instability due to interaction between cold ions. This leads...
Collisionless shock nonstationarity arising from microscale physics influences structure and particle acceleration mechanisms. Nonstationarity has been difficult to quantify due the small spatial temporal scales. We use closely spaced (subgyroscale), high-time-resolution measurements one rapid crossing of Earth's quasiperpendicular bow by Magnetospheric Multiscale (MMS) spacecraft compare competing processes. Using MMS's high-cadence kinetic plasma measurements, we show that exhibits in form ripples.
Abstract Turbulent plasmas generate intense current structures, which have long been suggested as magnetic reconnection sites. Recent Magnetospheric Multiscale observations in Earth’s magnetosheath revealed a novel form of where the dynamics only couple to electrons, without ion involvement. It was that such were driven by turbulence. In this study, fluctuations are examined determine properties turbulence and if signature is present statistics. The study reveals statistical consistent with...
We report the observations of an electron vortex magnetic hole corresponding to a new type coherent structures in magnetosheath turbulent plasma using Magnetospheric Multiscale (MMS) mission data. The is characterized by depression, density peak, total temperature increase (with parallel decrease but perpendicular increase), and strong currents carried electrons. current has dip center peak outer region hole. estimated size about 0.23 \r{ho}i (~ 30 \r{ho}e) circular cross-section its axis,...
Collisionless space plasma turbulence can generate reconnecting thin current sheets as suggested by recent results of numerical magnetohydrodynamic simulations. The MMS mission provides the first serious opportunity to check if small ion-electron-scale reconnection, generated turbulence, resembles reconnection events frequently observed in magnetotail or at magnetopause. Here we investigate field and particle observations obtained fleet turbulent terrestrial magnetosheath behind...
Abstract We present measurements from the Magnetospheric Multiscale (MMS) mission taken during a reconnection event on dayside magnetopause which includes passage through an electron diffusion region (EDR). The four MMS satellites were separated by about 10 km such that estimates of gradients and divergences allow reasonable estimate terms in generalized Ohm's law, is key to investigating energy dissipation reconnection. strength character mechanisms determines how magnetic released. show...
Abstract Spatial and high‐time‐resolution properties of the velocities, magnetic field, 3‐D electric field within plasma turbulence are examined observationally using data from Magnetospheric Multiscale mission. Observations a Kelvin‐Helmholtz instability (KHI) on Earth's magnetopause examined, which both provides series repeatable intervals to analyze, giving better statistics, first look at in KHI. For time direct observations high‐frequency ion electron velocity spectra showing differing...
Abstract In this paper we use the full armament of MMS (Magnetospheric Multiscale) spacecraft to study magnetic reconnection in turbulent magnetosheath downstream a quasi‐parallel bow shock. Contrarily magnetopause and magnetotail cases, only few observations have been reported. The case presents, for first time, both fluid‐scale kinetic‐scale signatures an ongoing magnetosheath. are crossing inflow outflow regions ion diffusion region (IDR). Inside outflows D shape distributions observed....
Abstract Based on high‐resolution measurements from NASA's Magnetospheric Multiscale mission, we present the dynamics of electrons associated with current systems observed near diffusion region magnetic reconnection at Earth's magnetopause. Using pitch angle distributions (PAD) and curvature analysis, demonstrate occurrence electron scattering in curved field down to energies 20 eV. We show that occurs closer sheet as energy decreases. The inflowing electrons, field‐aligned electrostatic...
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 $480...
On 2020 April 19 a coronal mass ejection (CME) was detected in situ by Solar Orbiter at heliocentric distance of about 0.8 AU. The CME later observed on 20th the Wind and BepiColombo spacecraft whilst located very close to Earth. This presents good opportunity for triple radial alignment study, as were separated less than 5$^\circ$ longitude. source CME, which launched 15th, an almost entirely isolated streamer blowout. STEREO-A event remotely from -75.1$^\circ$ longitude, is exceptionally...
Abstract. One of the primary objectives Double Star mission is accurate measurement magnetic field vector along orbits two spacecraft. The an essential parameter for understanding space plasma processes and also required effective interpretation data from other instruments on We present design instrument onboard both spacecraft overview performance as measured first on-ground then in-orbit. report results in-flight calibration magnetometers, processing methods employed to produce final...
Abstract We present Magnetospheric Multiscale observations of an electron‐scale current sheet and electron outflow jet for asymmetric reconnection with guide field at the subsolar magnetopause. The observed within region has Mach number 0.35 is associated agyrotropy. unstable to electrostatic instability which generates intense waves E ∥ amplitudes reaching up 300 mV m −1 potentials 20% thermal energy. see evidence interaction between beam, leading quick thermalization beam stabilization...