A5070935999- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Space Satellite Systems and Control
- Solar Radiation and Photovoltaics
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- GNSS positioning and interference
- Planetary Science and Exploration
- earthquake and tectonic studies
- Electromagnetic Launch and Propulsion Technology
- Spacecraft Design and Technology
- Seismic Imaging and Inversion Techniques
- Particle accelerators and beam dynamics
- Ocean Waves and Remote Sensing
- Marine and environmental studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Wind and Air Flow Studies
- Contact Mechanics and Variational Inequalities
- Tribology and Wear Analysis
- High-pressure geophysics and materials
- Soil Moisture and Remote Sensing
Czech Academy of Sciences, Institute of Atmospheric Physics
2013-2024
University of Maryland, Baltimore
2021-2024
Goddard Space Flight Center
2021-2024
Heliophysics
2021-2024
University of Maryland, Baltimore County
2021-2024
University of Baltimore
2024
Heliophysics Science Division
2022
Czech Academy of Sciences
2015
The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This designed to measure in-situ magnetic electric fields waves from continuous a few hundreds of kHz. RPW will also observe solar radio emissions up 16 MHz. primary importance science requirements since it essential answer three four overarching objectives. In addition exchange on-board data with other instruments order process algorithms for interplanetary shocks type III langmuir detections.
Abstract Parker Solar Probe observations are analyzed for the presence of reconnection exhausts across current sheets (CSs) within R < 0.26 au during encounters 4–11. Exhausts observed with nearly equal probability at all radial distances a preference quiescent Tp 0.80 MK plasmas typical slow-wind regime. High > fast wind characterized by significant transverse fluctuations rarely support irrespective CS width. Exhaust demonstrate local temperature gradients several CSs higher- plasma...
Abstract Radio waves are strongly scattered in the solar wind, so that their apparent sources seem to be considerably larger and shifted than actual ones. Since scattering depends on spectrum of density turbulence, a better understanding radio wave propagation provides indirect information relative fluctuations, <?CDATA $\epsilon =\langle \delta n\rangle /\langle $?> , at effective turbulence scale length. Here, we analyzed 30 type III bursts detected by Parker Solar Probe ( PSP ). For first...
Abstract We present a comprehensive study of type III radio bursts and their association with solar flares magnitude M1.0 larger, as observed by four widely separated spacecraft (Parker Solar Probe, Orbiter, STEREO-A, Wind). Our main focus is the introduction validation two methods for localizing using available multispacecraft data. The first method utilizes intensity fitting circular Gaussian distribution, while second based on time arrival bursts. demonstrate effectiveness these through...
Abstract We report on a comprehensive study of interplanetary type III radio bursts linked to X-class solar flares from NOAA active region 13664, which instigated the intense 2024 Mother’s Day storm, marked by geomagnetic storm −412 nT, strongest in over two decades. Utilizing novel localization techniques with direction-finding data STEREO-A, we identify an average eastward drift 13.°42 ± 11.°63 source locations relative GOES observations. Our analysis reveals significant correlation...
Abstract Type III bursts are generated by fast electron beams originated from magnetic reconnection sites of solar flares. As propagation radio waves in the interplanetary medium is strongly affected random density fluctuations, type provide us with a unique diagnostic tool for wind remote plasma measurements. Here, we performed statistical survey 152 simple and isolated observed twin-spacecraft Solar TErrestrial RElations Observatory mission. We investigated their time–frequency profiles...
Abstract We present a comprehensive analysis of 66 interplanetary shocks observed by the Parker Solar Probe between 2018 November and 2024 January. Among these, 33 events fulfilled Rankine–Hugoniot (R-H) conditions, ensuring reliable asymptotic plasma parameter solutions. The remaining could not be confirmed standard R-H approach—potentially including wave-like structures—yet were analyzed via averaging mixed-data methods to obtain robust shock parameters. Utilizing our ShOck Detection...
Abstract We present a comprehensive analysis of electron density measurements in the solar wind using quasi-thermal noise (QTN) spectroscopy applied to data from first 15 encounters Parker Solar Probe mission (2018 November–2023 March). Our methodology involves identification plasma line frequency and calculation based on situ measurements. By analyzing over 2.1 million points, we derive power-law model for as function radial distance Sun range 13 50 R ☉ : n e ( r ) = (343,466 ± 19921) ×...
Context. Solar Orbiter, launched in February 2020, started its cruise phase June coincidence with first perihelion at 0.51 au from the Sun. The situ instruments onboard, including Energetic Particle Detector (EPD), operate continuously during enabling observation of solar energetic particles. Aims. In measurements near-relativistic electron events observed July 2020 by EPD are analyzed and origins conditions for interplanetary transport these particles investigated. Methods. Electron...
Abstract Interplanetary Type III bursts, generated by relativistic electron beams at solar flare reconnection sites, are explored through an investigation of 152 instances observed the Solar Terrestrial Relations Observatory mission. This study reveals that absolute values wavevector deviations from Sun–spacecraft line statistically 3.72 and 2.10 larger than predicted density model, assuming fundamental harmonic emission, respectively. Through Monte Carlo simulations, we examine impact...
Type III radio bursts are intense emissions triggered by beams of energetic electrons often associated with solar flares. These exciter propagate outwards from the Sun along an open magnetic field line in corona and interplanetary (IP) medium. We performed a statistical survey 29 simple isolated IP type observed STEREO/Waves instruments between January 2013 September 2014. investigated their time-frequency profiles order to derive speed acceleration electron beams. show these noticeably...
Context. The Radio and Plasma Waves (RPW) instrument on board Solar Orbiter has been operating nearly continuously since the launch in February 2020. Time Domain Sampler (TDS) receiver of RPW is dedicated to waveform measurements plasma waves dust impact signatures an intermediate frequency range from 0.2 200 kHz. Aims. This article presents first data RPW-TDS discusses in-flight performance and, particular, on-board wave detection algorithm. We present TDS products its scientific operation....
Abstract The terrestrial bow shock provides us with a unique opportunity to extensively investigate properties of collisionless shocks using in situ measurements under wide range upstream conditions. Here we report statistical study 529 crossings observed between years 2001 and 2013 by the four Cluster spacecraft. By applying simple timing method multipoint measurements, are able their characteristic spatiotemporal features. We have found significant correlation speed motion solar wind...
Coronal mass ejections (CMEs) are large-scale eruptions of magnetized plasma that may cause severe geomagnetic storms if Earth-directed. Here we report a rare instance with comprehensive in situ and remote sensing observa- tions CME combining white-light, radio, measurements from four different vantage points. For the first time, have successfully applied radio direction-finding technique to an interplanetary type II burst detected by two identical widely separated receivers. The derived...
Abstract The interaction between interplanetary (IP) shocks and the solar wind has been studied in past for understanding of energy dissipation mechanisms within collisionless plasmas. Compared to study fast shocks, other types IP including slow mode (i.e., forward, reverse, reverse shocks) remained largely unnoticed. We analyze magnetic field fluctuations observed by Wind spacecraft from 1995 2021 upstream downstream using a continuous wavelet transform. evolution spectral indices ion...
We present an automated two‐step detection algorithm for identification of interplanetary (IP) shocks regardless their type in a real‐time data stream. This is aimed implementation on board the future Solar Orbiter mission triggering transmission high‐resolution to Earth. The first step based determination quality factor, Q indicating abrupt changes plasma parameters (proton density and bulk velocity) magnetic field strength. test two sets weighting coefficients propose second consisting...
Abstract The paper reports a clear dependence of basic structure two sublayers the low‐latitude boundary layer (LLBL) on northward and southward interplanetary magnetic field (IMF) orientations. Regardless different processes responsible for formation evolution entire LLBL, outer part LLBL is significantly influenced by sign IMF B Z component. Under conditions this present, whereas it missing during pointing IMF. This behavior can be understood in terms motion reconnection spots due to...
The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is designed to measure in situ magnetic electric fields waves from continuum up several hundred kHz. RPW also observes solar heliospheric radio emissions 16 MHz. It was switched its antennae were successfully deployed two days after launch of February 10, 2020. Since then, has acquired enough data make it possible assess performance electromagnetic disturbances experiences. In this article, we scientific present...
Abstract Coronal mass ejections (CMEs) are responsible for most severe space weather events, such as solar energetic particle events and geomagnetic storms at Earth. Type II radio bursts slow drifting emissions produced by beams of suprathermal electrons accelerated CME-driven shock waves propagating through the corona interplanetary medium. Here, we report a statistical study 153 type observed two STEREO spacecraft between 2008 March 2014 August. The associated emission was compared with...
Abstract Type III radio bursts are generated by electron beams accelerated at reconnection sites in the corona. This study, utilizing data from Parker Solar Probe’s first 17 encounters, closely examines these down to 13 solar radii. A focal point of our analysis is near-radial alignment (within 5°) Probe, STEREO-A, and Wind spacecraft relative Sun. alignment, facilitating simultaneous observations 52 27 STEREO-A respectively, allows for a detailed differentiation radial longitudinal burst...
Abstract Frequency‐time spectrograms of electromagnetic waves observed in the inner magnetosphere frequency range about 1–8 kHz are sometimes formed by several nearly horizontal and almost equidistant intense lines. Such events called magnetospheric line radiation (MLR). We use a list 1230 MLR identified all data measured low‐altitude satellite Detection Electro‐Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) during duration mission (2004–2010). compare occurrence with solar...
Abstract Very low frequency wave intensity measurements provided by the French low‐altitude DEMETER spacecraft are studied using principal component analysis (PCA). We focus on both physical interpretation of first two components and their application to real problems. Variations (PC1) coefficients due geomagnetic activity seasonal/longitudinal changes studied. It is shown that distribution corresponds dependences obtained in previous studies. Moreover, variations PC1 around interplanetary...
The spectral properties of interplanetary magnetic field fluctuations across different types (IP) shocks at 1 AU found to be almost conserved in the previous study (Park et al., 2023). Nevertheless, slope transition range obtained for fast reverse (FR) exhibits strong flattening shock, which leads less conclusive results with our limited dataset. We enlarge dataset using PSP, Solar Orbiter, ACE, DSCOVR, STEREO and Wind, compare forward (FF) FR shocks. Furthermore, we analyze 2-year, 3-year,...