Results 41 to 50 of about 2,743,097 (252)

Cluster spacecraft observations of a ULF wave enhanced by Space Plasma Exploration by Active Radar (SPEAR) [PDF]

, 2009
Space Plasma Exploration by Active Radar (SPEAR) is a high-latitude ionospheric heating facility capable of exciting ULF waves on local magnetic field lines. We examine an interval from 1 February 2006 when SPEAR was transmitting a 1 Hz modulation signal
T. R. Robinson (7590257), Tim K. Yeoman (7583066), Badman, S. V., Clausen, L. B. N., L. B. N. Clausen (7594130), R. C. Fear (7591262), S. V. Badman, Robinson, T. R., Wright, D. M., S. V. Badman (7590704), T. K. Yeoman, D. M. Wright (7583069), Fear, R. C., T. R. Robinson, D. M. Wright, Yeoman, T. K., R. C. Fear, L. B. N. Clausen   +17 more
core   +1 more source

Features of Nightside ULF Wave Activity in the Ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractWe investigate the features of nightside ultralow frequency (ULF) waves in the ionosphere using electric field data in the DC/ULF range observed by the Detection of Electro‐Magnetic Emissions Transmitted from Earthquake Regions (DEMETER) satellite over a ~5.5‐year period from May 2005 to November 2010.
X.Y. Ouyang, J. Bortnik, J. Ren, J.J. Berthelier   +3 more
openaire   +3 more sources

ULF waves in the Io torus: Ulysses observations [PDF]

Journal of Geophysical Research: Space Physics, 1993
Throughout the Io torus, Ulysses has observed intense ULF wave activity in both electric and magnetic components. Such ULF waves have been previously suggested as the source of ion precipitation leading to Jovian aurorae. The peaks of the wave spectra are closely related to the ion cyclotron frequencies, which is evidence of the waves being ion ...
Lin, Naiguo, Kellogg, P. J., Macdowell, R. J., Mei, Y., Cornilleau-Wehrlin, N., Canu, P., de Villedary, C., Rezeau, L., Balogh, A., Forsyth, R. J.   +9 more
openaire   +2 more sources

Evidence of Transverse Magnetospheric Field Line Oscillations as Observed from Cluster and Ground Magnetometers [PDF]

, 2005
The dynamic spectrum of ULF waves from magnetic field data obtained by the elliptically orbiting Cluster satellites (with an apogee of 119 000 km, perigee of 19 000 km and the orbital period of 57 h) have been prepared in the frequency range 0 to 120 mHz
A. Balogh (7591361), A. K. Sinha, S. W. H. Cowley, Balogh, A., Wild, J. A., Timothy Kenneth Yeoman (7635005), Wright, D. M., J. A. Wild, A. Balogh, J. A. Wild (7591442), T. K. Yeoman, Cowley, S. W. H., D. M. Wright (7583069), D. M. Wright, Stanley William Herbert Cowley (7627505), A. K. Sinha (1768696), Sinha, A. K., Yeoman, T. K.   +17 more
core   +1 more source

Pitch Angle Structures of Ring Current Ions Induced by Evolving Poloidal Ultra‐Low Frequency Waves

Geophysical Research Letters, 2020
Ultra‐low frequency (ULF) waves can effectively accelerate ring current ions through drift‐bounce resonance. Conventional theories have been developed to understand this resonance since the dawn of the space age, which usually assume ULF waves are quasi ...
Z.‐Y. Liu, Q.‐G. Zong, X.‐Z. Zhou, Y.‐F. Zhu, S.‐J. Gu   +4 more
doaj   +1 more source

ULF wave activity during the 2003 Halloween superstorm: multipoint observations from CHAMP, Cluster and Geotail missions [PDF]

Annales Geophysicae, 2012
We examine data from a topside ionosphere and two magnetospheric missions (CHAMP, Cluster and Geotail) for signatures of ultra low frequency (ULF) waves during the exceptional 2003 Halloween geospace magnetic storm, when Dst reached ~−380 nT. We
G. Balasis, I. A. Daglis, E. Zesta, C. Papadimitriou, C. Papadimitriou, M. Georgiou, M. Georgiou, R. Haagmans, K. Tsinganos   +8 more
doaj   +1 more source

Observing drift compressional waves in the nightside ionosphere using the Ekaterinburg radar

, 2021
A review of researches related to ultra low frequency (ULF) waves studied using a midlatitude coherent decameter radar located near Ekaterinburg (EKB), Russia is presented. The radar was constructed similar to SuperDARN radars.
Chelpanov, Maksim A., Mager, Olga V., Maksim A. Chelpanov, Olga V. Mager   +3 more
core   +1 more source

Multipoint Conjugate Observations of Dayside ULF Waves During an Extended Period of Radial IMF

Journal of Geophysical Research: Space Physics, 2020
Long‐lasting Pc5 ultralow frequency (ULF) waves spanning the dayside and extending from L ∼ 5.5 into the polar cap region were observed by conjugate ground magnetometers.
Xueling Shi, M. Hartinger, J. Baker, J. Ruohoniemi, D. Lin, Zhonghua Xu, S. Coyle, B. Kunduri, L. Kilcommons, A. Willer   +9 more
semanticscholar   +1 more source

Visualization of ULF waves in SuperDARN data [PDF]

Geophysical Research Letters, 2003
Measurements of ionospheric E × B drifts obtained with HF radars from the SuperDARN (Super Dual Auroral Radar) Network sometimes show signatures of ULF (few mHz) waves. We present a new data display technique that facilitates the detection of ULF waves in both ground and sea scatter returns.
Ponomarenko, Pavlo V., Menk, Frederick W., Waters, Colin L.   +2 more
openaire   +1 more source

Origin of Frequency‐Doubling and Shoulder‐Like Magnetic Pulsations in ULF Waves

Geophysical Research Letters, 2021
We present Van Allen Probes observations of a long‐lasting ultralow frequency (ULF) wave event with frequency doubling features in the compressional wave component.
Li Li, Xuzhi Zhou, Q. Zong, Xingran Chen, Ying Liu, Y. Hao, C. Yue, Y. Omura, R. Rankin, S. Fu   +9 more
semanticscholar   +1 more source