Results 171 to 180 of about 18,719 (213)

Ionospheric propagation of ULF-waves

Journal of Atmospheric and Terrestrial Physics, 1984
Abstract Features of mid-latitude ionospheric propagation of geomagnetic pulsations are studied. It is shown that the orientation of the horizontal component of the incident wave vector with reference to the geomagnetic meridian has a strong influence on the amplitude transformation and on the angle of rotation of the polarization plane.
A.I Pudovkin, C.A Loginov, E.V Pudovkina, M.I Pudovkin, A.V Usmanov   +4 more
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Quarter-wave ULF pulsations

Planetary and Space Science, 1983
Abstract Recent theoretical work has predicted the possible existence of “quarter-wave” ULF pulsation resonances, in which the wave electric field has a near-node in one ionosphere and an antinode in the conjugate ionosphere. Eigenvalues are derived for quarter-wave toroidal and guided poloidal resonances for a range of L -values and plasma density ...
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A study of ULF wave foreshock morphology—I: ULF foreshock boundary

Planetary and Space Science, 1992
Abstract We have used ISEE 1 and 2 magnetometer data to determine the forward boundary of the upstream ULF wave foreshock. We first examine the presence and absence of ULF waves immediately upstream from the bow shock. The statistical results show that the ULF foreshock starts at θBn ∼ 50° on the bow shock, and fills the entire upstream region ...
G. Le, C.T. Russell
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Theory of ULF-modulated electrostatic wave

Planetary and Space Science, 1986
Abstract Generation mechanism of ELF emissions in the presence of a coherent ULF wave based on the plasma maser theory is proposed. The results are consistent with the observation by Cornilleau-Wehrlin (1981).
M. Nambu, T. Tamao, A. Miura, H. Taniguchi, S. Bujarbarua, S.N. Sarma   +5 more
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ULF waves in planetary magnetospheres

2006
Ultra-low frequency (ULF) waves are messengers in space plasmas. They communicate information about unstable, free-energy-containing plasma configurations, transient phenomena, or obstacles in flowing plasmas; they transport energy between different parts of magnetospheric systems; and they serve as momentum coupling agents between remote regions such ...
Karl-Heinz Glassmeier, Jared Espley
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ULF wave observations in Jupiter's magnetosphere

Advances in Space Research, 2001
In previous work we have examined magnetometer data from the Ulysses Jupiter flyby, and in particular middle magnetosphere observations in the vicinity of the magnetodisk. Waves transverse to the background magnetic field were found in the heavy ion gyrofrequency regime, a signature of Ion Cyclotron (IC) waves. We examined the dayside and high latitude
Panagiota Petkaki, Michele K. Dougherty
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ULF Waves in the Magnetosphere

Reviews of Geophysics, 1991
Research efforts in the area of magnetospheric ULF waves in the 1987-1990 period are reviewed. Attention is given to externally excited hydromagnetic waves including field line resonance, the global cavity mode, bow-shock-associated upstream waves, and Kelvin-Helmholtz waves.
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Magnetospheric ULF Waves: A Review

2011
Ultra-low frequency (ULF; approx. 1 mHz ≤ f ≤ 10 Hz) MHD plasma waves are readily recorded throughout the Earth’s magnetosphere and on the ground. Generated by a variety of instabilities, ULF waves transport and couple energy throughout the system, and may play important roles in the energization and loss of radiation belt particles.
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Pc3–4 ULF waves at polar latitudes

Journal of Atmospheric and Solar-Terrestrial Physics, 2008
Abstract A search for Pc3–4 wave activity was performed using data from a trans-Antarctic profile of search-coil magnetometers extending from the auroral zone through cusp latitudes and deep into the polar cap. Pc3–4 pulsations were found to be a ubiquitous element of ULF wave activity in all these regions.
V.A. Pilipenko, O.M. Chugunova, M.J. Engebretson   +2 more
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ULF waves at very high latitudes

2006
Observations in the ULF frequency range (from mHz to Hz) at very high latitudes, at the poleward auroral boundary and beyond, make it possible to characterize the turbulent energy transfer from the solar wind into dayside regions of the magnetosphere and the magnetotail.
M. J. Engebretson, J. L. Posch, V. A. Pilipenko, O. M. Chugunova   +3 more
openaire   +1 more source