Results 31 to 40 of about 1,668 (135)

Random Forest Model of Ultralow‐Frequency Magnetospheric Wave Power

Earth and Space Science, 2020
Models of magnetospheric ultralow‐frequency (ULF) waves can be used to study wave phenomena and to calculate the effect of these waves on the energization and transport of radiation belt electrons.
S. N. Bentley, J. R. Stout, T. E. Bloch, C. E. J. Watt   +3 more
doaj   +1 more source

High-latitude HF Doppler observations of ULF waves. 1. Waves with large spatial scale sizes [PDF]

Annales Geophysicae, 1997
A quantitative study of observations of the ionospheric signatures of magnetospheric ultra low frequency (ULF) waves by a high-latitude (geographic: 69.6°N 19.2°E) high-frequency Doppler sounder has been undertaken.
D. M. Wright, T. K. Yeoman, P. J. Chapman   +2 more
doaj   +1 more source

INTERACTION BETWEEN LONG-PERIOD ULF WAVES AND CHARGED PARTICLES IN THE MAGNETOSPHERE: THEORY AND OBSERVATIONS (OVERVIEW)

Solar-Terrestrial Physics, 2021
The paper reviews the current state of the problem of interaction between long-period ultra-low-frequency (ULF) waves and high-energy particles. We consider elements of the theory of energy exchange between waves and particles, particle transport across ...
D.Yu. Klimushkin, P.N. Mager, M.A. Chelpanov, D.V. Kostarev   +3 more
doaj   +1 more source

Listening to the Magnetosphere: How Best to Make ULF Waves Audible

Frontiers in Astronomy and Space Sciences, 2022
Observations across the heliosphere typically rely on in situ spacecraft observations producing time-series data. While often this data is analysed visually, it lends itself more naturally to our sense of sound.
Martin O. Archer, Marek Cottingham, Michael D. Hartinger, Xueling Shi, Xueling Shi, Shane Coyle, Ethan “Duke” Hill, Michael F. J. Fox, Emmanuel V. Masongsong   +8 more
doaj   +1 more source

Numerical study of the generation and propagation of ultralow-frequency waves by artificial ionospheric F region modulation at different latitudes [PDF]

Annales Geophysicae, 2016
Powerful high-frequency (HF) radio waves can be used to efficiently modify the upper-ionospheric plasmas of the F region. The pressure gradient induced by modulated electron heating at ultralow-frequency (ULF) drives a local oscillating diamagnetic ...
X. Xu, C. Zhou, R. Shi, B. Ni, Z. Zhao, Y. Zhang   +5 more
doaj   +1 more source

A case study of large-amplitude ULF waves in the Martian foreshock

Earth and Planetary Physics, 2020
Foreshock ultralow frequency (ULF) waves constitute a significant physical phenomenon in the plasma environment of terrestrial planets. The occurrence of these waves, associated with backstreaming particles reflected and accelerated at the bow shock ...
LiCan Shan, YaSong Ge, AiMin Du
doaj   +1 more source

High resolution observations of spectral width features associatedwith ULF wave signatures in artificial HF radar backscatter [PDF]

Annales Geophysicae, 2004
The EISCAT high power heating facility at Tromsø, northern Norway, has been utilised to generate artificial radar backscatter in the fields of view of the CUTLASS HF radars.
D. M. Wright, T. K. Yeoman, L. J. Baddeley, J. A. Davies, J. A. Davies, R. S. Dhillon, M. Lester, S. E. Milan, E. E. Woodfield, E. E. Woodfield   +9 more
doaj   +1 more source

Formation of a magnetic duct by the compressional component of ULF oscillation: a ray tracing study of whistler-mode wave propagation

Earth, Planets and Space
We investigate the propagation of whistler-mode waves in ultralow frequency (ULF) wave-derived magnetic ducts using ray tracing simulations in a two-dimensional dipole coordinate system on the meridian plane. The refractive index modulation caused by the
Kohki Tachi, Yuto Katoh
doaj   +1 more source

Ultra-Low Frequency Waves of Foreshock Origin Upstream and Inside of the Magnetospheres of Earth, Mercury, and Saturn Related to Solar Wind–Magnetosphere Coupling

Universe
This review examines ultra-low frequency (ULF) waves across different planetary environments, focusing on Earth, Mercury, and Saturn. Data from spacecraft missions (CHAMP, Swarm, and Oersted for Earth; MESSENGER for Mercury; and Cassini for Saturn ...
Zsofia Bebesi, Navin Kumar Dwivedi, Arpad Kis, Antal Juhász, Balazs Heilig   +4 more
doaj   +1 more source

Solar cycle evolution of ULF wave power in solar wind and on ground

Journal of Space Weather and Space Climate, 2020
The solar cycle evolution of the ultra-low frequency (ULF) power was studied in solar wind and on ground. We aim finding out how the ULF power in interplanetary and on ground magnetic field evolves over the solar cycle 23 (SC23) and how well do they ...
Hynönen Reko, Tanskanen Eija I., Francia Patrizia   +2 more
doaj   +1 more source