Results 61 to 70 of about 1,080,647 (142)

Enhanced Global Ionospheric Mapping Using Deep Ensemble Neural Networks With Uncertainty Quantification

Space Weather, Volume 23, Issue 7, July 2025.
Abstract Global ionospheric mapping is essential for ionospheric research. However, conventional approaches often struggle to accurately capture small‐scale ionospheric variations. This study proposes a deep ensemble method based on neural networks (NNs) that generates high‐accuracy global vertical total electron content (VTEC) maps along with ...
Shuyin Mao, Yuanxin Pan, Grzegorz Kłopotek, Matthias Schartner, Hana Krásná, Aletha de Witt, Benedikt Soja   +6 more
wiley   +1 more source

Multi-modal MHD oscillations in the solar corona, and their use in coronal seismology [PDF]

The solar atmosphere is a dynamic, inhomogeneous environment which acts as a natural plasma laboratory for a keen community of observers and researchers at the forefront of modern physics. Colossal plasma non-uniformities on the Sun are seen to host a wide variety of magnetoacoustic oscillatory motions, which may be used as probes into the local plasma
openaire   +1 more source

A Two‐Step Method for Enhancing Thermospheric Mass Density Empirical Model

Space Weather, Volume 23, Issue 5, May 2025.
Abstract With the rapid development of Low Earth Orbit constellations, the importance of accurately estimating thermospheric mass density is steadily increasing. Current empirical models still exhibit unavoidable biases in estimating thermospheric mass density.
Yu Guo, Fei Guo, Xiaohong Zhang, Yan Yang, Dengkui Mei, Xiaodong Ren   +5 more
wiley   +1 more source

Relating near-Earth observations of an interplanetary coronal mass ejection to the conditions at its site of origin in the solar corona [PDF]

, 2005
A halo coronal mass ejection (CME) was detected on January 20, 2004. We use solar remote sensing data (SOHO, Culgoora) and near-Earth in situ data (Cluster) to identify the CME source event and show that it was a long duration flare in which a magnetic ...
Fazakerley, AN, Fazakerley, Andrew N., Culhane, J. Leonard, Mazelle, C., Balogh, A., Matthews, SA, van Driel-Gesztelyi, Lidia, Lucek, E., Reme, H, Owen, Chris J., Harra, LK, Harra, Louise K., Owen, CJ, Lucek, E, van Driel-Gesztelyi, L, Balogh, A, Culhane, JL, Matthews, Sarah A., Mazelle, C, Reme, H.   +19 more
core  

Successively Equatorward Propagating Ionospheric Acoustic Waves and Possible Mechanisms Following the Mw 7.5 Earthquake in Noto, Japan, on 1 January 2024

Space Weather, Volume 23, Issue 4, April 2025.
Abstract On 1 January 2024, the Mw 7.5 Noto Peninsula earthquake in Japan generated ionospheric disturbances detected via dense GNSS networks. Significant coseismic acoustic waves emerged ∼8 min post‐event, exhibiting 0.3 TECU amplitudes, 2–8 min periods, and ∼1 km/s propagation speeds.
Bing Zhang, Tong Liu, Xueshang Feng, Guochang Xu   +3 more
wiley   +1 more source

Current sheets in the solar corona : formation, fragmentation and heating [PDF]

, 2011
In this thesis we investigate current sheets in the solar corona. The well known 1D model for the tearing mode instability is presented, before progressing to 2D where we introduce a non-uniform resistivity.
Bowness, Ruth
core   +2 more sources

Nowcasting Solar Energetic Particle Events for Mars Missions

Space Weather, Volume 23, Issue 4, April 2025.
Abstract In addition to the omnipresent Galactic Cosmic Rays, sudden Solar Energetic Particle (SEP) events present considerable health hazards for manned space missions. These events not only contribute to an increased long‐term cancer risk, but can, in extreme cases, cause acute radiation syndromes.
Jan Leo Löwe, Salman Khaksarighiri, Robert F. Wimmer‐Schweingruber, Donald M. Hassler, Bent Ehresmann, Jingnan Guo, Günther Reitz, Thomas Berger, Daniel Matthiä, Cary Zeitlin, Sven Löffler   +10 more
wiley   +1 more source

NEUVAC: Nonlinear Extreme Ultraviolet Irradiance Model for Aeronomic Calculations

Space Weather, Volume 22, Issue 12, December 2024.
Abstract The need for reliable estimates of solar extreme ultraviolet (EUV) for operational space weather nowcasting and forecasting has motivated the development of new model of solar irradiance variability in 59 wavelength bins between 1 and 1,750 Å.
Daniel A. Brandt, Aaron J. Ridley
wiley   +1 more source

Solar cycle dependence of scaling in solar wind fluctuations [PDF]

, 2008
In this review we collate recent results for the statistical scaling properties of fluctuations in the solar wind with a view to synthesizing two descriptions: that of evolving MHD turbulence and that of a scaling signature of coronal origin that ...
B. Hnat, Hnat, B., Kiyani, K., S. C. Chapman, K. Kiyani, Chapman, S. C., Chapman, Sandra C.   +6 more
core   +2 more sources

Comparative Analysis of Higher‐Order Ionospheric Delay on PPP Long‐Term Coordinate Time Series and Residual Modeling Using Horizontal Gradients and RINEX Data

Space Weather, Volume 22, Issue 12, December 2024.
Abstract Higher‐order ionospheric corrections, including second‐ and third‐order effects and signal bending, are essential for improving Global Navigation Satellite System (GNSS) time series accuracy. However, their influence on long‐term Precise Point Positioning (PPP) time series, particularly signal bending, remains underexplored.
Kaichun Yang, Weiping Jiang, Zhao Li, Xin Ding, Ran Lu   +4 more
wiley   +1 more source