Results 21 to 30 of about 227,638 (221)
Operative center of the geophysical prognosis in Izmiran [PDF]
Annales Geophysicae, 2005 IZMIRAN was founded about 65 years ago with one of the goals of carrying out geomagnetic prognoses. More or less, this activity has been developed during its entire history, but about 6 years ago this aim became sufficiently feasible due to the ...
A. V. Belov +5 more
doaj +1 more source
Large scale simulations of solar type III radio bursts: flux density, drift rate, duration and bandwidth [PDF]
A&A 572, A111 (2014), 2014 Non-thermal electrons accelerated in the solar corona can produce intense coherent radio emission, known as solar type III radio bursts. This intense radio emission is often observed from hundreds of MHz in the corona down to the tens of kHz range in interplanetary space.
arxiv +1 more source
Signal Strength of VLF Radio Wave Measured at Syowa Station in Antarctica
Antarctic Record, 1976 The measurement of NAA-17.8 kHz signal strength was made at Syowa Station, Antarctica, for one year from February 1970 to January 1971. The diurnal and seasonal variations of the signal strength are shown.
Toshirou SAKAMOTO, Isao SHIRO
doaj +1 more source
On the Formation of Cluster Radio Relics [PDF]
Mon.Not.Roy.Astron.Soc. 331 (2002) 1011, 2001 (abridged) We present detailed 3-dimensional magneto-hydrodynamical simulations of the passage of a radio plasma cocoon filled with turbulent magnetic fields through a shock wave. Taking into account synchrotron, inverse Compton and adiabatic energy losses and gains we evolved the relativistic electron population to produce synthetic polarisation radio
arxiv +1 more source
Diagnostic study of geomagnetic storm-induced ionospheric changes over very low-frequency signal propagation paths in the mid-latitude D region [PDF]
Annales Geophysicae, 2022 We performed a diagnostic study of geomagnetic storm-induced disturbances that are coupled to the mid-latitude D region by quantifying the propagation characteristics of very low-frequency (VLF) radio signals from transmitters located in Cumbria, UK ...
V. U. J. Nwankwo +10 more
doaj +1 more source
Forward Modeling of the Type III Radio Burst Exciter [PDF]
Sol Phys (2019) 294: 62, 2019 In this work, we propose a forward-modeling method to study the trajectory and speed of the interplanetary (IP) Type-III radio burst exciter. The model assumes that the source of an IP Type-III radio burst moves outward from the Sun following the Parker spiral field line.
arxiv +1 more source
Atmosphere, 2020 The paper is devoted to the description of observations over atmospheric and electric effects from volcanic eruptions on Kamchatka peninsula (Russia) and perspectives of their development.
Pavel P. Firstov +7 more
doaj +1 more source
Methods and Algorithms of Subsurface Holographic Sounding
Remote Sensing, 2022 In our experiments, we develop and test portable multi-element receiver antenna arrays, electrically scanned in order to immediately obtain a recognizable image of subsurface objects.
A. V. Popov +5 more
doaj +1 more source
Методика выделения информативных признаков в сигналах геоакустической эмиссии
Информатика и автоматизация, 2019 Исследования геоакустической эмиссии в сейсмоактивном регионе на Камчатке показывают, что при подготовке землетрясений и последующей релаксации поля локальных напряжений в пункте наблюдений в геоакустических сигналах возникают ярко выраженные импульсные ...
Yuri Igorevich Senkevich +3 more
doaj +1 more source
Nature of microstructure in pulsar radio emission [PDF]
Mon.Not.Roy.Astron.Soc. 327 (2001) 984, 2000 We present a model for microstructure in pulsar radio emission. We propose that micropulses result from the alteration of the radio wave generation region by nearly transverse drift waves propagating across the pulsar magnetic field and encircling the bundle of the open magnetic field lines.
arxiv +1 more source