Results 21 to 30 of about 3,423,847 (360)

Structure of the auroral precipitation region in the dawn sector: relationship to convection reversal boundaries and field-aligned currents [PDF]

open access: yesAnnales Geophysicae, 2001
. Simultaneous DMSP F7 and Viking satellite measurements of the dawnside high-latitude auroral energy electron and ion precipitation show that the region of the low and middle altitude auroral precipitation consists of three characteristic plasma ...
Y. I. Feldstein   +6 more
doaj   +1 more source

An FRB Sent Me a DM: Constraining the Electron Column of the Milky Way Halo with Fast Radio Burst Dispersion Measures from CHIME/FRB [PDF]

open access: yesAstrophysical Journal, 2023
The CHIME/FRB project has detected hundreds of fast radio bursts (FRBs), providing an unparalleled population to statistically probe the foreground media that they illuminate. One such foreground medium is the ionized halo of the Milky Way (MW).
A. Cook   +49 more
semanticscholar   +1 more source

The Solar Orbiter Radio and Plasma Waves (RPW) instrument

open access: yesAstronomy & Astrophysics, 2020
The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This instrument is designed to measure in-situ magnetic and electric fields and waves from the continuous to a few hundreds of kHz.
M. Maksimović   +106 more
semanticscholar   +1 more source

Magnetic field reversal in the turbulent environment around a repeating fast radio burst [PDF]

open access: yesScience, 2022
Fast radio bursts (FRBs) are brief, intense flashes of radio waves from unidentified extragalactic sources. Polarized FRBs originate in highly magnetized environments.
R. Anna-Thomas   +29 more
semanticscholar   +1 more source

Auroral electrojet dynamics during magnetic storms, connection with plasma precipitation and large-scale structure of the magnetospheric magnetic field [PDF]

open access: yesAnnales Geophysicae, 1999
Effect of the equatorward shift of the eastward and westward electrojets during magnetic storms main phase is analyzed based on the meridional chains of magnetic observatories EISCAT and IMAGE and several Russian observatories (geomagnetic longitude ...
Y. I. Feldstein   +6 more
doaj   +1 more source

Time-frequency analysis-based deep interference classification for frequency hopping system

open access: yesEURASIP Journal on Advances in Signal Processing, 2022
It is known that interference classification plays an important role in protecting the authorized communication system and avoiding its performance degradation in the hostile environment.
Changzhi Xu   +6 more
doaj   +1 more source

RADIO COUNTERPARTS OF COMPACT BINARY MERGERS DETECTABLE IN GRAVITATIONAL WAVES: A SIMULATION FOR AN OPTIMIZED SURVEY [PDF]

open access: yes, 2016
Mergers of binary neutron stars and black hole–neutron star binaries produce gravitational-wave (GW) emission and outflows with significant kinetic energies. These outflows result in radio emissions through synchrotron radiation.
K. Hotokezaka   +5 more
semanticscholar   +1 more source

Modified Luneburg Lens Based on Metamaterials

open access: yesInternational Journal of Antennas and Propagation, 2015
We present the design, fabrication, and experimental characterization of a modified two-dimensional Luneburg lens based on bulk metamaterials. The lens is composed by a number of concentric layers.
Haibing Chen   +8 more
doaj   +1 more source

The role of natural E-region plasma turbulence in the enhanced absorption of HF radio waves in the auroral ionosphere:Implications for RF heating of the auroral electrojet [PDF]

open access: yesAnnales Geophysicae, 1994
Physical processes which affect the absorption of radio waves passing through the auroral E-region when Farley-Buneman irregularities are present are examined.
T. R. Robinson
doaj   +1 more source

Experimental simulation of satellite observations of 100 kHz radio waves from relativistic electron beams above thunderclouds [PDF]

open access: yesAtmospheric Chemistry and Physics, 2011
Relativistic electron beams above thunderclouds emit 100 kHz radio waves which illuminate the Earth's atmosphere and near-Earth space. This contribution aims to clarify the physical processes which are relevant for the spatial spreading of the radio ...
M. Füllekrug, C. Hanuise, M. Parrot
doaj   +1 more source

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