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Akademický článek

Prediction of plasmaspheric hiss spectral classes

Autor: Dmitri Kondrashov, Alexander Y. Drozdov, Daniel Vech, David M. Malaspina

Publikováno v: Frontiers in Astronomy and Space Sciences, Vol 9 (2022)

We present a random forests machine learning model for prediction of plasmaspheric hiss spectral classes from the Van Allen Probes dataset. The random forests model provides accurate prediction of plasmaspheric hiss spectral classes obtained by the s

Externí odkaz: https://doaj.org/article/cddbfe9d0af5409a9c2f89eafe83bbab

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Correlation between bandwidth and frequency of plasmaspheric hiss uncovered with unsupervised machine learning

Autor: Daniel Vech, David M. Malaspina, Alexander Drozdov, Anthony Saikin

Previous statistical studies of plasmaspheric hiss investigated the averaged shape of the magnetic field power spectra at various points in the magnetosphere. However, this approach does not consider the fact that very diverse spectral shapes exist a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b9efce8c8c454897e30e84a3fe4fc0f
http://arxiv.org/abs/2207.10505

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A Novel Machine Learning Technique to Identify and Categorize Plasma Waves in Spacecraft Measurements

Autor: David M. Malaspina, Daniel Vech

Publikováno v: Journal of Geophysical Research: Space Physics. 126

The available magnetic field data from the terrestrial magnetosphere, solar wind and planetary magnetospheres exceeds over $10^6$ hours. Identifying plasma waves in these large data sets is a time consuming and tedious process. In this Paper, we prop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8cd2a307ba7b710130854cd09ad32eb
https://doi.org/10.1029/2021ja029567

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Electrostatic Waves with Rapid Frequency Shifts in the Solar Wind from PSP observations

Publikováno v: 2021 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM).

During its first five orbits, the FIELDS plasma wave investigation on board Parker Solar Probe (PSP) has observed a multitude of plasma waves, including electrostatic whistler and electron Bernstein waves (Malaspina et al. 2020), sunward propagating

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::06e72b3acaf5e417f582fccd4a5c231c
https://doi.org/10.23919/usnc-ursinrsm51531.2021.9336447

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The Radial Dependence of Proton-scale Magnetic Spectral Break in Slow Solar Wind during PSP Encounter 2

Publikováno v: Astrophysical Journal Supplement
Astrophysical Journal Supplement, American Astronomical Society, 2020, 246 (2), pp.55. ⟨10.3847/1538-4365/ab672d⟩

Magnetic field fluctuations in the solar wind are commonly observed to follow a power law spectrum. Near proton-kinetic scales, a spectral break occurs which is commonly interpreted as a transition to kinetic turbulence. However, this transition is n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4168c8d5d187f511878563d560a2f430
https://hal-insu.archives-ouvertes.fr/insu-02937840

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Proton Temperature Anisotropy Variations in Inner Heliosphere Estimated with the First Parker Solar Probe Observations

Publikováno v: Astrophysical Journal Supplement
Astrophysical Journal Supplement, American Astronomical Society, 2020, 246 (2), pp.70. ⟨10.3847/1538-4365/ab74e0⟩

We report proton temperature anisotropy variations in the inner heliosphere with Parker Solar Probe (PSP) observations. Using a linear fitting method, we derive proton temperature anisotropy with temperatures measured by the Solar Probe Cup (SPC) fro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7066f0b577344044fdbdfbff14f115f
https://hal.archives-ouvertes.fr/hal-03259393

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MHD Mode Composition in the Inner Heliosphere from the Parker Solar Probe ’s First Perihelion

Publikováno v: The Astrophysical Journal Supplement Series
The Astrophysical Journal Supplement Series, IOPscience 2020, 246 (2), pp.71. ⟨10.3847/1538-4365/ab745c⟩

International audience; Field and plasma variations during the first perihelion pass of the Parker Solar Probe (PSP) from 53 into 35 solar radii (RS) from the Sun and over a frequency range in the spacecraft frame (fSC) from 0.0002 to 0.2 Hz are deco

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::642141d559a6ce8be9e84248ae631a9f
https://hal-insu.archives-ouvertes.fr/insu-03468821

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Wave-particle energy transfer directly observed in an ion cyclotron wave

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 650, pp.A10. ⟨10.1051/0004-6361/202039296⟩

Context. The first studies with Parker Solar Probe (PSP) data have made significant progress toward the understanding of the fundamental properties of ion cyclotron waves in the inner heliosphere. The survey mode particle measurements of PSP, however

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d320afe3c952725e0fe301d4907cc711

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