A5033870057- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Lightning and Electromagnetic Phenomena
- Astro and Planetary Science
- Seismic Waves and Analysis
- Dust and Plasma Wave Phenomena
- Magnetic confinement fusion research
- Astrophysics and Cosmic Phenomena
- Theoretical and Computational Physics
- Gamma-ray bursts and supernovae
- Space Satellite Systems and Control
- Magneto-Optical Properties and Applications
- Electrostatic Discharge in Electronics
- Planetary Science and Exploration
- Geophysical and Geoelectrical Methods
- Impact of Light on Environment and Health
- Geochemistry and Geologic Mapping
- Atmospheric aerosols and clouds
- Optical Wireless Communication Technologies
Laboratoire de Physique et Chimie de l’Environnement et de l’Espace
2011-2022
Laboratoire Chimie de l'Environnement
2022
Université d'Orléans
1992-2019
Centre National de la Recherche Scientifique
2000-2019
Cornell University
1998
Abstract. The Spatio Temporal Analysis of Field Fluctuations (STAFF) experiment is one the five experiments, which constitute Cluster Wave Experiment Consortium (WEC). STAFF consists a three-axis search coil magnetometer to measure magnetic fluctuations at frequencies up 4 kHz, waveform unit (up either 10 Hz or 180 Hz) and Spectrum Analyser kHz). combines 3 components waves with two electric measured by Electric Fields Waves (EFW) calculate in real time 5 × Hermitian cross-spectral matrix 27...
A set of experimental data is presented for a high‐Mach‐number ( M f = 5) quasiperpendicular (θ Bn 81°) bow shock layer crossed by Cluster spacecraft on 24 January 2001 at 07:05–07:09 UT. The measurements magnetic field, spectra electric field fluctuations, and ion distributions reveal that the highly nonstationary. In particular, profiles measured aboard different differ considerably from each other. mean frequency downshifted waves observed upstream ramp oscillates with characteristic time...
A three‐dimensional fluid description of nonlinear lower hybrid waves is investigated in the context plasma density depletions. The objective a basic understanding solitary structures associated with transverse ion acceleration topside auroral ionosphere. equations are linearized about parabolic depletion and solved. solution consists potential (eigenfunctions) which rotate angle center depletion. eigenfrequencies discrete for |ω| < ω LH . These eigenfunctions left‐handed sense...
The acceleration of electrons results in observable electromagnetic waves which can be used for remote sensing. Here, we make use ∼4 Hz–66 MHz radio emitted by two consecutive intense positive lightning discharges to investigate their impact on the atmosphere above a thundercloud. It is found that first discharge initiates sprite where are accelerated during exponential growth and branching streamers. This preconditioned plasma thundercloud subsequently exposed second associated with...
Abstract We investigate the influence of lightning‐generated whistlers on overall intensity electromagnetic waves measured by Detection Electro‐Magnetic Emissions Transmitted from Earthquake Regions spacecraft (2004–2010, quasi Sun‐synchronous polar orbit with an altitude about 700 km) at frequencies below 18 kHz. Whistler occurrence rate evaluated using onboard neural network designed for automated whistler detection is used to distinguish periods high and low rates. It shown that...
First recordings of satellite ELF/VLF waveform data associated with transient luminous event (TLE) observations are reported from the summer 2005 campaign coordinated by Stanford University and Laboratoire de Physique et Chimie l'Environnement l'Espace (LPCE). TLEs optically observed U.S. Langmuir Laboratory, while simultaneously recorded on board Centre National d'Etudes Spatiales microsatellite DEMETER ground at Langmuir. Analyses measurements sprite events 28 July 3 August presented....
Lower hybrid solitary structures have been observed by sounding rockets in the auroral ionosphere for over a decade and half. Surprisingly, few laboratory experiments attempted to reproduce this interesting phenomena. Recently, Rosenberg Gekelman [2001] investigated interaction between fluctuations near lower resonance field‐aligned density striations using Large Plasma Device at University of California, Los Angeles. The measurements electromagnetic localized plasma gradient are new...
Abstract For the first time an evaluation of whistler rate around Earth is performed using results from neural network aboard microsatellite DEMETER. It shown that whistlers with low dispersion calculated all as a function longitude vary between 1 and 6 s −1 during nighttime (22.30 LT) 0.5 0.7 daytime (10.30 LT). The anticorrelated F 10.7‐cm solar flux. A decrease by 25% flux corresponds to increase 62% (26%) averaged for entire (daytime). Using this rate, global lightning estimated be order...
The Geoelectrodynamics and Electro‐Optical Detection of Electron Suprathermal Ion Currents (GEODESIC) sounding rocket encountered more than 100 filamentary density cavities associated with enhanced plasma waves at ELF (<3 kHz) VLF (3–10 frequencies altitudes 800–990 km during an auroral substorm. These were similar in size (∼20 m diameter most cases) to so‐called lower‐hybrid (LHCs) observed by previous rockets satellites; however, contrast, many the GEODESIC exhibited up tenfold...
We report here observations of both symmetric and asymmetric forms V-shaped streaks on VLF spectrograms recorded board the DEMETER satellite.Recent investigations have shown that are associated with intense numerous 0+ whistlers generated in range by active thunderstorms.To understand origin different spectral events, a systematic survey these phenomena is performed means visual inspection covering more than 5 years observations.Asymmetric events frequently observed over high-latitude...
Both symmetric and asymmetric forms of V-shaped streaks observed on board DEMETER satellite are reported. They associated with intense numerous 0+ whistlers generated above high active thunderstorms regions. To understand the origin different spectral forms, a systematic survey is performed over 5 years VLF-data. Asymmetric events more frequently for latitude The importance magnetic field orientation form pointed out confirmed by: - A propagation model based cold plasma properties. An event...
[1] In the paper “Properties of lower hybrid solitary structures: A comparison between space observations, a laboratory experiment, and cold homogeneous plasma dispersion relation” by P. W. Schuck, J. Bonnell, L. Pinçon, (Journal Geophysical Research, 109, A01310, doi:10.1029/2002JA009673, 2004), there are several typographical errors. four places, symbol ψ should be replaced with ϕ. The paragraphs corrected sentences reproduced below. [2] [41] term “electrostatic” seems to point general...