A5044847365- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- GNSS positioning and interference
- Earthquake Detection and Analysis
- Scientific Computing and Data Management
- Space Science and Extraterrestrial Life
- Geophysics and Gravity Measurements
- Combustion and flame dynamics
- nanoparticles nucleation surface interactions
- Wind and Air Flow Studies
- Stellar, planetary, and galactic studies
- Gas Dynamics and Kinetic Theory
- Image and Signal Denoising Methods
- Species Distribution and Climate Change
- Radio Astronomy Observations and Technology
- Atmospheric and Environmental Gas Dynamics
- Advanced Power Generation Technologies
- Radioactive Decay and Measurement Techniques
- Laser-induced spectroscopy and plasma
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Radio, Podcasts, and Digital Media
- Fluid Dynamics and Turbulent Flows
- Spaceflight effects on biology
University of Iowa
2024
Goddard Space Flight Center
2022-2024
University of America
2024
Catholic University of America
2024
New Mexico Consortium
2022-2023
University of Oslo
2019-2022
University of Calabria
2016
The description of the local turbulent energy transfer and high-resolution ion distributions measured by Magnetospheric Multiscale mission together provide a formidable tool to explore cross-scale connection between fluid-scale cascade plasma processes at subion scales. When small-scale is dominated Alfv\'enic, correlated velocity, magnetic field fluctuations, beams accelerated particles are more likely observed. Here, for first time, we report observations suggesting nonlinear wave-particle...
We investigate the nature of small-scale irregularities observed in cusp by Twin Rockets to Investigate Cusp Electrodynamics-2 (TRICE-2) regions enhanced phase scintillations and high-frequency coherent radar backscatter. take advantage fact that were detected spatially separated probes, present an interferometric analysis both electron density electric field fluctuations. provide evidence fluctuations spanning a few decameters about meter have low velocity plasma reference frame are...
Synthetic turbulence models are useful tools that provide realistic representations of turbulence, necessary to test theoretical results, serve as background fields in some numerical simulations, and analysis tools. Models one-dimensional (1D) 3D synthetic previously developed still required large computational resources. A "wavelet-based" model able produce a field with tunable spectral law, intermittency, anisotropy, is presented here. The rapid algorithm introduced, based on the classic...
Citizen science connects scientists with the public to enable discovery, engaging broad audiences across world. There are many attributes that make citizen an asset field of heliophysics, including agile collaboration. Agility is extent which a person, group people, technology, or project can work efficiently, pivot, and adapt adversity. agile; they adaptable responsive. projects their underlying technology platforms also in software development sense, by utilizing beta testing short...
The dynamics occurring at the terrestrial magnetopause are investigated by using Geotail and THEMIS spacecraft data of crossings during ongoing Kelvin–Helmholtz instability. Properties plasma turbulence intermittency presented, with aim understanding evolution as a result development have been tested against standard diagnostics for intermittent turbulence, such autocorrelation function, spectral analysis scale-dependent statistics magnetic field increments. A quasi-periodic modulation...
Abstract The characteristics of turbulent plasma in the winter cusp ionosphere is studied based on in‐situ data from Investigation Cusp Irregularities (ICI) sounding rockets. electron density fluctuations ICI‐2 and ICI‐3 missions have been analyzed for whole flight, using advanced time‐series analysis techniques. autocorrelation scale indicative turbulence integral marks onset cascade large to small scales power spectrum rocket data. typical a field. structures are persistent data, which...
We investigate a new regime of inertial Alfvén wave turbulence observed in the very low beta plasma auroral ionosphere using electric and magnetic field measurements by TRICE-2 sounding rocket. Combining features frequency spectra with linear properties waves, we deduce path anisotropic turbulent cascade through vector space. find critically balanced magnetohydrodynamic scales range down to perpendicular scale skin depth, followed parallel ion length. infer damping combination proton...
Space weather refers to conditions around a star, like our Sun, and its interplanetary space that may affect space- ground-based assets as well human life. can manifest many different phenomena, often simultaneously, create complex sometimes dangerous conditions. The study of is inherently trans-disciplinary, including subfields solar, magnetospheric, ionospheric, atmospheric research communities, but benefiting from collaborations with policymakers, industry, astrophysics, software...
Whitepaper #112 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; basic research. Additional research/operations/research loop; research/applications/operations pipeline; […]
Whitepaper #233 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; infrastructure/workforce/other programmatic. Additional research/applications/operations pipeline; state of […]
Whitepaper #113 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; infrastructure/workforce/other programmatic. Additional research/operations/research loop; […]
The amateur radio community is a global, highly engaged, and technical with an intense interest in space weather, its underlying physics, how it impacts communications. large-scale observational capabilities of distributed instrumentation fielded by operators science enthusiasts offers tremendous opportunity to advance the fields heliophysics, science, weather. Well-established networks like RBN, WSPRNet, PSKReporter already provide rich, ever-growing, long-term data bottomside ionospheric...
Whitepaper #255 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research; infrastructure/workforce/other programmatic. Additional ground-based missions/projects; emerging opportunities; state of profession; […]
We present the first set of particle-in-cell simulations including Monte Carlo collisions between charged and neutral particles used to simulate a cylindrical Langmuir probe in electron saturation regime with collisional sheath. use setup focused on E-region ionosphere; however, results these are analyzed general sense using dimensionless values. find that currents get enhanced as collision frequency for electrons increases values λe/λD→1, where λe is mean free path λD Debye length. In...
Abstract The VISIONS‐2 35.039 sounding rocket was launched from Ny‐Ålesund, Svalbard, on 7 December 2018 at 11:06 UT, and traveled overhead of the cusp aurora. payload reached an apogee 806.6 km provided measurements electric field ( E ) electron density N e with a high sampling rate 6,250 Hz. high‐sampling‐data make it possible to estimate horizontal structure scales ranging meters kilometers scale. variation in (Δ / Δ integrated power (Σ P Ne Σ for 1–10, 10–100, 100–1,000 Hz range were...
Photospheric motions are believed to be the source of coronal heating and velocity fluctuations detected in solar corona. A numerical model, based on shell technique applied reduced magnetohydrodynamics equations, is used represent energy injection due footpoint motions, storage dissipation a loop. Motions at loop bases simulated by random signals whose frequency-wavenumber spectrum reproduces features photospheric motions: p-mode peak low-frequency continuum. Results indicate that turbulent...
Whitepaper #232 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; infrastructure/workforce/other programmatic. Additional research/operations/research loop; […]
<p>The turbulence at the interface between solar wind and Earth’s magnetosphere, mediated by magnetopause its boundary layer are investigated using Geotail THEMIS spacecraft data during ongoing Kelvin-Helmholtz instability (KHI). The efficient transfer of energy across scales for which is responsible, achieves connection macroscopic flow microscopic dissipation this energy. This thought to be result observed plasma transfer, driven development KHI, originating...