Results 91 to 100 of about 166,062,727 (217)

Impacts of the GDS 2018 Global Dust Storm on Martian Ionosphere‐Thermosphere Coupling via Atmospheric Tides

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract In this study, we investigate the ionospheric and thermospheric responses to the 2018 Mars global dust storm (GDS 2018) by examining atmosphere–ionosphere coupling through tidal structures. Using Mars Atmosphere and Volatile EvolutioN Neutral Gas and Ion Mass Spectrometer observations, we analyze tidal amplitudes, phases, and inter‐species ...
Noritsugu Nagata, Huixin Liu, Sonal Jain, Scot Rafkin, Victoria Hartwick, Hiromu Nakagawa   +5 more
wiley   +1 more source

In Situ Evidence of Ionospheric Feedback Instability Adjacent to a Quiescent Auroral Arc

Geophysical Research Letters
The ACES‐II Low sounding rocket, which launched from Andøya Space Center in Andenes, Norway, on 20 November 2022, made low altitude observations consistent with characteristics of the Ionosphere Feedback Instability (IFI) as it traversed a quiet ...
Kenton Greene, David M. Miles, Scott R. Bounds, John W. Bonnell, Connor Feltman, Roger Roglans, Anatoly Streltsov   +6 more
doaj   +1 more source

Saturn's Auroral Dusk Sector Magnetosphere‐Ionosphere Coupling During Cassini's Proximal Orbits

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract The final twenty‐two low‐altitude passes of the Cassini spacecraft enabled the determination of Saturn's field‐aligned currents (FACs) from magnetometer measurements at lower altitudes than previously achieved. We investigate southern dusk‐side FAC behavior with four objectives: how in situ MAG measurements compare to the highly variable ...
S. W. Farr, S. V. Badman, L. C. Ray, G. Provan, J. Kinrade, L. S. Clare   +5 more
wiley   +1 more source

Spatial structure of plasma density perturbations, induced in the ionosphere modified by powerful HF radio waves: review of experimental results [PDF]

Solnechno-Zemnaya Fizika, 2015
In the review, the results of experimental studies of spatial structure of small-, middle-, and large-scale plasma density perturbations induced in the ionosphere by its pumping by powerful HF O-mode (ordinary) radio waves, are analyzed. It is shown that the region with induced plasma density perturbations occupied all ionosphere body from its E-region
openaire   +1 more source

A Dynamic Auroral Ionospheric Density Profile Reveals a Planetary‐Scale Cavity at Jupiter

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Low‐altitude measurements above Jupiter's main auroras have shown the presence of persistent auroral density depletions. This low density regime strongly favors auroral acceleration by inertial Alfvén waves to explain the predominance of energetic (100–1,000 keV) broadband electron beams.
N. S. Kruegler, A. H. Sulaiman, S. S. Elliott   +2 more
wiley   +1 more source

Michigan Geospace Model With Ensemble Forecasting and Particle Filtering: Modeling the May 2024 Extreme Storm

Space Weather, Volume 24, Issue 9, September 2026.
Abstract This paper introduces an updated version of the University of Michigan Geospace model. The Geospace model has been used for operational forecasting at the Space Weather Modeling Center of the National Oceanic and Atmospheric Agency since 2016 with regular updates. The current operational version, Geospace V2, was launched in 2021 and is driven
Gábor Tóth, Pauline Dredger, Tuija Pulkkinen   +2 more
wiley   +1 more source

Dusty space plasma diagnosis using temporal behavior of polar mesospheric summer echoes during active modification [PDF]

, 2011
The objective of this paper is to study the effect of different plasma and dust parameters on Polar Mesospheric Summer Echoes (PMSE) temporal behavior after turn-on and turn-off of radio wave heating and to use these responses to diagnose the properties ...
Senior, Andrew, A. Senior, A. Mahmoudian, Rietveld, Mike, Scales, Wayne, W. A. Scales, M. Rietveld, Mahmoudian, Alireza, Kosch, Michael, M. J. Kosch   +9 more
core   +2 more sources

Robust Machine Learning–Based Ionospheric Delay Grid Modeling for PPP‐RTK Under Sparse Reference Stations and Severe Geomagnetic Disturbance

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Sparse reference station networks and severe geomagnetic disturbances can significantly degrade the accuracy of regional ionospheric delay modeling at the network side, thereby reducing the positioning performance of PPP‐RTK. To address this issue, this study proposes a machine learning‐based ionospheric delay grid modeling method that finely ...
Linyu He, Weiping Jiang, Hua Chen, Xingyu Zhou, Tianjun Liu, Jie He, Jie Ding   +6 more
wiley   +1 more source

The influence of IMF By on the nature of the nightside high-latitude ionospheric flow during intervals of positive IMF Bz [PDF]

, 2004
This paper further addresses the issue of nightside flow bursts which occur during intervals of northward but strongly BY-influenced IMF. Recent discussions of such bursts concerned intervals during which the IMF BY component was negative.
Tim K. Yeoman (7583066), Badman, S. V., S. W. H. Cowley, P. J. Cripps (7591382), S. V. Badman, S. W. H. Cowley (7590302), Grocott, A., S. V. Badman (7590704), Cripps, P. J., P. J. Cripps, Adrian Grocott (7590026), T. K. Yeoman, Cowley, S. W. H., A. Grocott, Yeoman, T. K.   +14 more
core   +2 more sources

Direct Evidence of the Lower Atmosphere Perturbations Producing Abnormal Ionospheric Longitudinal Gradients During Quiescent Geomagnetic Conditions

Geophysical Research Letters
An unusual case of a large ionospheric longitudinal gradient in East Asia on 11 May 2021 occurred during a geomagnetically‐quiet period. It shows the largest east‐west difference in electron density at Yamagawa and Wuhan stations when Kp 
Yuyan Jin, Biqiang Zhao, Xu Zhou, Honglian Hao, Guozhu Li, Xinan Yue, Zishen Li   +6 more
doaj   +1 more source