Results 21 to 30 of about 166,062,727 (217)

A plasma vortex revisited: The importance of including ionospheric conductivity measurements [PDF]

, 2000
In an earlier paper [Kosch et al., 1998], simultaneous all-sky TV imager and Scandinavian Twin Auroral Radar Experiment (STARE) observations of an ionospheric plasma vortex located poleward of an auroral arc were presented.
Kosch, Mike J., Scourfield, M.W.J., Amm, O.   +2 more
core   +4 more sources

Magnetospheric signatures of ionospheric density cavities observed by Cluster [PDF]

, 2015
AJBR ackowledges support from STFC under consolidated grant ST/K000993/1.We present Cluster measurements of large amplitude electric fields corre- lated with intense downward field-aligned currents, observed during a nightside crossing of the auroral ...
Wright, A. N., Karlsson, Tomas, A. J. B. Russell, A. N. Wright, T. Karlsson, Wright, Andrew Nicholas, Russell, A. J. B., Karlsson, T., Russell, Alexander John Barkway, Karlsson, Tomas,   +9 more
core   +1 more source

Multi-instrument observations of the ionospheric counterpart of a bursty bulk flow in the near-Earth plasma sheet [PDF]

, 2004
International audienceOn 07 September 2001 the Cluster spacecraft observed a "bursty bulk flow" event in the near-Earth central plasma sheet. This paper presents a detailed study of the coincident ground-based observations and attempts to place them ...
Tim K. Yeoman (7583066), Rème, H., S. W. H. Cowley, Frey, H.U., H. U. Frey, H. Rème, Nakamura, R., Klecker, B., S. W. H. Cowley (7590302), H. Rème (7591274), Cowley, S.W.H., Grocott, A., R. Nakamura (7591343), H. U. Frey (7591265), Adrian Grocott (7590026), T. K. Yeoman, Cowley, S. W. H., A. Grocott, B. Klecker, B. Klecker (7591355), Frey, H. U., Yeoman, T. K., Yeoman, T.K., R. Nakamura   +23 more
core   +2 more sources

Seismo-ionospheric anomalies and implications from recent GNSS observations in India and South-East Asia

Geodesy and Geodynamics, 2016
The lithosphere and the atmosphere/ionosphere, continuously exchange energy through various coupling mechanisms. Earthquake creates waves of energy, e.g. direct shock acoustic waves (SAWs) and Rayleigh wave induced acoustic waves (RAWs).
C.D. Reddy
doaj   +1 more source

Multi‐Source Perturbations in the Evolution of a Low‐Latitudinal Equatorial Plasma Bubble Event Occurred Over China

Space Weather, 2023
In this paper, multi‐source perturbations during the evolution of an equatorial plasma bubble (EPB) event at low latitudes in China are studied by means of multi‐ground‐based instruments, including an all‐sky airglow imager, a very high frequency (VHF ...
Longchang Sun, Jiyao Xu, Yajun Zhu, Wei Yuan, Hong Gao, Chunxiao Yan   +5 more
doaj   +1 more source

Ionospheric vertical plasma drift perturbations due to the quasi 2 day wave [PDF]

Journal of Geophysical Research: Space Physics, 2015
AbstractThe thermosphere‐ionosphere‐mesosphere‐electrodynamics–general circulation model is utilized to study the vertical E × B drift perturbations due to the westward quasi 2 day wave with zonal wave numbers 2 and 3 (W2 and W3). The simulations show that both wind components contribute directly and significantly to the vertical drift, which is not ...
Sheng‐Yang Gu, Han‐Li Liu, Tao Li, Xiankang Dou   +3 more
openaire   +1 more source

Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities [PDF]

, 2004
International audienceWe present radar backscatter power measurements using the CUTLASS HF radar at Hankasalmi, Finland from F-region field-aligned irregularities induced by HF radio pumping with the EISCAT Heating facility.
A. Senior, Rietveld, Michael T., Kosch, M.J., Borisov, N. D., Honary, F., Rietveld, M. T., Senior, A., T. K. Yeoman, Borisov, N.D., M. T. Rietveld, Kosch, M. J., M. J. Kosch, F. Honary, Yeoman, T. K., N. D. Borisov, Yeoman, T.K.   +15 more
core   +2 more sources

Simultaneous ionospheric and magnetospheric observations of azimuthally propagating transient features during substorms [PDF]

, 1998
International audienceDuring the 6th August 1995, the CUTLASS Finland HF radar ran in a high time resolution mode, allowing measurements of line-of-sight convection velocities along a single beam with a temporal resolution of 14 s.
Tim K. Yeoman (7583066), Mukai, T., Yamamoto, T., T. K. Yeoman, T. Mukai, T. Yamamoto, T. Mukai (7612310), T. Yamamoto (3689515), Yeoman, T. K., Yeoman, T.K.   +9 more
core   +2 more sources

On using a double-thin-shell approach and TEC perturbation component to sound night-time mid-latitude E–F coupling

Earth, Planets and Space, 2022
Observations and theoretical analysis on the night-time mid-latitude ionospheric irregularities support the postulation of frequently coupled E and F regions.
Weizheng Fu, Tatsuhiro Yokoyama, Nicholas Ssessanga, Mamoru Yamamoto, Peng Liu   +4 more
doaj   +1 more source

Trimpi Perturbations from Large Ionisation Enhancement Patches

, 2000
A number of increasingly sophisticated and realistic models have been developed in order to investigate the interaction between sub-ionospherically propagating VLF waves and regions of enhanced electron density in the D-region caused by lightning induced
D. Nunn, Nunn, D, H.J. Strangeways, Strangeways, HJ   +3 more
core   +2 more sources