Tracing the Heliospheric Magnetic Field via Anisotropic Radio-Wave Scattering [PDF]
Scientific ReportsAstrophysical radio sources are embedded in turbulent magnetised environments. In the 1 MHz sky, solar radio bursts are the brightest sources, produced by electrons travelling along magnetic field lines from the Sun through the heliosphere. We demonstrate that the magnetic field not only guides the emitting electrons, but also directs radio waves via ...
Daniel L. Clarkson +6 more
arxiv +3 more sources
The Twisting of Radio Waves in a Randomly Inhomogeneous Plasma [PDF]
arXivPolarization of electromagnetic waves carries a large amount of information about their astrophysical emitters and the media they passed through, and hence is crucial in various aspects of astronomy. Here we demonstrate an important but long-overlooked depolarization mechanism in astrophysics: when the polarization vector of light travels along a non ...
Ze-Lin Zhang, Ruo-Yu Liu
arxiv +2 more sources
Atmospheric drag effects on modelled low Earth orbit (LEO) satellites during the July 2000 Bastille Day event in contrast to an interval of geomagnetically quiet conditions [PDF]
Annales Geophysicae, 2021 In this work, we simulated the atmospheric drag effect on two model SmallSats (small satellites) in low Earth orbit (LEO) with different ballistic coefficients during 1-month intervals of solar–geomagnetic quiet and perturbed conditions. The goal of this
V. U. J. Nwankwo +10 more
doaj +1 more source
Tunable triple-band millimeter-wave absorbing metasurface based on nematic liquid crystal
AIP Advances, 2022 We propose and design a tunable triple-band millimeter-wave absorbing metasurface based on nematic liquid crystal (NLC). Numerical results based on both effective circuit model and full-wave simulations verify the triple-band absorption property.
Qiang Wang +4 more
doaj +1 more source
3D complex envelope leapfrog ADI‐FDTD algorithm
Electronics Letters, 2021 This paper presents a 3D complex envelope leapfrog alternating‐direction‐implicit finite‐difference time‐domain method. Compared with the previous work, the proposed method costs less computation runtime and memory while maintaining similar accuracy. The
Yunyang Dong, Jianyi Zhou
doaj +1 more source
Dynamo effects in gravity [PDF]
E3S Web of Conferences, 2019 Nonlinear oscillations in the dynamic system of gravitational and material fields are considered. The problems of singularities and caustics in gravity, expansion and baryon asymmetry of the Universe, wave prohibition of collapse into black holes, and ...
Shevtsov Boris
doaj +1 more source
Analysis of geomagnetic disturbances dynamics during increased solar activity and magnetic storms (according to the measurements of INTERMAGNET station network) [PDF]
E3S Web of Conferences, 2019 We present and describe an automated method for analysis of magnetic data and for detection of geomagnetic disturbances based on wavelet transformation.
Mandrikova Oksana +2 more
doaj +1 more source
Structure of the auroral precipitation region in the dawn sector: relationship to convection reversal boundaries and field-aligned currents [PDF]
Annales 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
Auroral electrojet dynamics during magnetic storms, connection with plasma precipitation and large-scale structure of the magnetospheric magnetic field [PDF]
Annales 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
EURASIP 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