Results 41 to 50 of about 86,535 (196)

A measure of ionospheric irregularities: zonal velocity and its implications for L-band scintillation at low-latitudes

Earth and Planetary Physics, 2021
We estimate the zonal drift velocity of small-scale ionospheric irregularities at low latitude by leveraging the spaced-receivers technique applied to two GNSS receivers for scintillation monitoring installed along the magnetic parallel passing in ...
Claudio Cesaroni, Luca Spogli, Giorgiana De Franceschi, Juliana Garrido Damaceno, Marcin Grzesiak, Bruno Vani, Joao Francisco Galera Monico, Vincenzo Romano, Lucilla Alfonsi, Massimo Cafaro   +9 more
doaj   +1 more source

Beyond the Electrostatic Approach: Numerical Simulations of Martian Ionospheric Irregularities

AGU Advances
Numerical simulations play an essential role in the study of ionospheric irregularities. In the past few decades, electrostatic simulations have successfully simulated the nonlinear evolution of terrestrial ionospheric irregularities.
Konghan Jiang, Jiuhou Lei, Maodong Yan
doaj   +1 more source

On effective conductivity of the ionosphere with random irregularities [PDF]

Annales Geophysicae, 1995
The influence of stochastic irregularities of the ionosphere on its effective conductivity has been estimated. The study was carried out for large scale inhomogeneities and quasistationary electromagnetic fields.
L. Alperovich, I. Chaikovsky
doaj   +1 more source

Neutral Wind Control of Jupiter's Non‐Auroral Ionosphere

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract We use JAMMIES (JAMMIES is Another Model Making Ionospheric EStimates), a new model of Jupiter's non‐auroral ionosphere, to demonstrate that neutral wind‐driven field‐aligned plasma transport can explain decades of measurements inconsistent with a solar‐dominated ionosphere. Two observations highlight these inconsistencies: a minimum in H3+ ${\
K. Mohamed, O. Agiwal, L. Moore, I. Mueller‐Wodarg, J. D. Huba, C. Martinis, T. Stallard, H. Melin   +7 more
wiley   +1 more source

Effects of high-latitude atmospheric gravity wave disturbances on artificial HF radar backscatter [PDF]

, 2006
International audienceObservations of HF radar backscatter from artificial field-aligned irregularities in an ionosphere perturbed by travelling disturbances due to atmospheric gravity waves are presented.
Tim K. Yeoman (7583066), A. Senior, M. J. Kosch (7595327), I. W. McCrea, M. T. Rietveld (7594184), Rietveld, M. T., Senior, A., T. K. Yeoman, I. W. McCrea (7594871), M. T. Rietveld, Kosch, M. J., M. J. Kosch, A. Senior (3255282), McCrea, I. W., Yeoman, T. K.   +14 more
core   +2 more sources

A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions [PDF]

, 2007
The Super Dual Auroral Radar Network (SuperDARN) has been operating as an international co-operative organisation for over 10 years. The network has now grown so that the fields of view of its 18 radars cover the majority of the northern and southern ...
M. P. Freeman, Sofko, G.J., P. L. Dyson, Ruohoniemi, J. M., Kikuchi, T., J. M. Ruohoniemi, Chisham, G., Walker, A.D.M., Dyson, P. L., R. A. Greenwald, G. J. Sofko, Milan, S.E., T. K. Yeoman, M. Pinnock, J.-P. Villain, Freeman, M. P., A. Grocott, Rash, J.P.S., Sato, N., Yeoman, T. K., Freeman, M.P., Bristow, W.A., Milan, S. E., K. A. McWilliams, N. Sato, Lester, M., Villain, J.-P., Greenwald, R.A., G. Chisham, Bristow, W. A., A. D. M. Walker, Grocott, A., Mcwilliams, K. A., M. Lester, Pinnock, M., Dyson, P.L., Walker, A. D. M., McWilliams, K.A., T. Kikuchi, S. E. Milan, Ruohoniemi, J.M., Greenwald, R. A., Sofko, G. J., J. P. S. Rash, Rash, J. P. S., W. A. Bristow, Yeoman, T.K.   +46 more
core   +4 more sources

IMF By‐Controlled Dawn–Dusk and Hemispheric Asymmetries of Kelvin–Helmholtz Waves and Reconnection Geometry Under Negative Dipole Tilt

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Along with magnetic reconnection, Kelvin‐Helmholtz (KH) waves are the main mechanisms controlling the solar wind‐magnetosphere interaction, enabling plasma transport into the magnetosphere due to secondary reconnection, diffusion and wave‐particle interactions.
L. Holappa, K. Nykyri, J. Laitinen, B. Burkholder   +3 more
wiley   +1 more source

Geomagnetic Field Influence on Trans‐Ionospheric HF Wave Propagation via Topside Z–to–O Mode Conversion

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Satellite observations during ionospheric modification experiments have reported trans‐ionospheric high‐frequency (HF) wave propagation even when the pump frequency lies below the peak plasma frequency. Such behavior is often attributed to large‐scale density irregularities that locally permit ordinary‐mode (O‐mode) propagation, but this does ...
Danish Naeem, Dong‐Hun Lee, Kihong Kim
wiley   +1 more source

First Detections of Ionospheric Plasma Density Irregularities from GOES Geostationary GPS Observations during Geomagnetic Storms

Atmosphere
In this study, we present the first results of detecting ionospheric irregularities using non-typical GPS observations recorded onboard the Geostationary Operational Environmental Satellites (GOES) mission operating at ~35,800 km altitude.
Iurii Cherniak, Irina Zakharenkova, Scott Gleason, Douglas Hunt   +3 more
doaj   +1 more source

Impacts of Mid‐Latitude Ionospheric Dynamics on RF Applications During the November 2025 Superstorm Event

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract This study demonstrates the intriguing and complex interplay among auroral precipitation, enhanced TEC, density irregularities, and amplitude scintillations observed during the November 2025 superstorm. For the first time, we present observations of strong amplitude scintillation across continental United States (CONUS)—nearly from coast to ...
E. Yizengaw, W. Younas, Y. Nishimura, C. Gabrielse, T. Beach, A. J. Coster, R. Pradipta, K. M. Groves   +7 more
wiley   +1 more source