Results 131 to 140 of about 8,882 (233)

A New Model of Cutoff Latitude for Solar Energetic Protons Based on the Partial Least Squares Method

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Solar energetic particle (SEP) events can cause space weather hazards, especially at high altitudes and in the polar regions. Therefore, it is important to determine the boundaries that SEPs with different energies/rigidities can access and impact. In this work, we develop a new model of cutoff latitude for solar energetic protons covering the
Zhenghao She, Hui Zhu, Qian Song, Yao Chen, Yingying Zhao, Huicong Chen, Zhijie Qin   +6 more
wiley   +1 more source

Martian ionospheric response during the may 2024 solar superstorm. [PDF]

Nat Commun
Parrott J, Sánchez-Cano B, Svedhem H, Witasse O, Meggi D, Wilson C, Cardesín-Moinelo A, Müller-Wodarg I.   +7 more
europepmc   +1 more source

IRI Model Specification of the Upper Transition Height at the Equatorial Region: Comparison Against a Dedicated Model Based on C/NOFS Data During Low Solar Activity

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The Upper Transition Height (UTH) is a critical parameter for understanding topside ionosphere dynamics. This study evaluates the UTH performance of the International Reference Ionosphere (IRI) model using the TBT15 ion composition option and compares it against a dedicated UTH model developed from the Communication/Navigation Outage Forecast ...
Fabricio Prol, Alessio Pignalberi, Artem Smirnov   +2 more
wiley   +1 more source

A quantile-based composite ionospheric disturbance estimator for RTK positioning reliability. [PDF]

Sci Rep
Vallis A, Celms A, Zvirgzds J, Vallis J.
europepmc   +1 more source

The Impact of the May 2024 Geomagnetic Storm on TRISAT Orbital Decay: A TLE‐Based Analysis With a Lifetime Forecast

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The 10–13 May 2024 geomagnetic storm was one of the strongest space‐weather events of Solar Cycle 25 and produced a major expansion of the thermosphere, substantially increasing atmospheric drag on low‐Earth‐orbit spacecraft. In this study, we quantify the storm‐time orbital response of TRISAT, Slovenia's first 3U CubeSat, using publicly ...
N. Kosanič, I. Kramberger
wiley   +1 more source

Beyond Mean Solar Wind Conditions: Turbulence‐Aware Forecasting of the AE Index

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The auroral electrojet (AE) index is a key indicator of high latitude geomagnetic activity and is widely used in operational space weather monitoring, yet forecasting AE from upstream solar wind conditions remains challenging due to nonlinear coupling, internal magnetospheric dynamics, and multiscale variability.
Cara L. Waters, Christopher H. K. Chen, Mathew J. Owens   +2 more
wiley   +1 more source

High-Frequency Skywave Source Geolocation Using Deep Learning-Based TDOA Estimation and Bias-Regularized Semidefinite Programming with Field Evaluation. [PDF]

Sensors (Basel)
Xu C, Ai H, He L, Hu C, Chen S, Li Z, Liu X.   +6 more
europepmc   +1 more source

Statistical Properties of Dayside Single‐Crest Structure of the Equatorial Ionization Anomaly Derived From Global Ionospheric Maps

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The classical Equatorial Ionization Anomaly (EIA) is characterized by two separated plasma accumulation regions off the geomagnetic equator and a plasma depletion region in between. Deviations from the typical double‐crest structure, including the single crest and multiple crests, have been observed.
Ping Zhou, Xing Meng, Jiawen Chen, Jiuhou Lei   +3 more
wiley   +1 more source

Performance Investigation of Four Ionospheric Models in Estimating hmF2 in High‐Latitude Regions

Space Weather, Volume 24, Issue 7, July 2026.
Abstract As a critical parameter characterizing the vertical structure of the ionosphere, the peak height of the F2 layer (hmF2) plays an essential role in frequency selection and signal propagation in high‐frequency (HF) communication systems. Accurate prediction of hmF2 is particularly important in high‐latitude regions.
T. Y. Li, Q. Yu, Y. F. Shi, C. Yang, J. Q. Fan, J. Wang   +5 more
wiley   +1 more source

Unprecedented extreme depletion of Earth's ionosphere during the May 2024 super geomagnetic storm revealed by the Chinese Meridian Project. [PDF]

Natl Sci Rev
Cao J.
europepmc   +1 more source