Results 151 to 160 of about 126,546 (328)

Robust Statistical Techniques for Operational Maintenance of the 10.7 cm Solar Radio Flux

Space Weather, Volume 23, Issue 5, May 2025.
Abstract The F10.7 solar radio flux is a critical quantity for operational space weather nowcasting and forecasting, where it is routinely used as a driver for coupled atmospheric models to estimate a variety of important quantities such as the neutral atmospheric density.
Daniel A. Brandt, Erick F. Vega, Brian J. Thelen   +2 more
wiley   +1 more source

Statistical Threshold for Tsunamigenic Ionospheric Disturbance Detection in GPS Radio Occultation Measurements

Space Weather, Volume 23, Issue 5, May 2025.
Abstract Tsunamis can induce ionospheric disturbances that can be detected through analysis of global navigation satellite system signals collected by low Earth orbit (LEO) satellites. Consequently, tsunamis can be monitored by LEO satellites. For real‐time automatic tsunami monitoring, determining whether detected disturbances are attributed to a ...
Bu‐gyeom Kim, Chia‐Hung Chen, Changdon Kee   +2 more
wiley   +1 more source

Thermospheric Orthohelium, He23S $\mathrm{H}\mathrm{e}\left({\mathrm{2}}^{\mathrm{3}}\mathrm{S}\right)$, Variations Associated With a Moderate Storm in February 2023: The NIRAS‐2 Observations at the Kjell Henriksen Observatory (78.1°N, 16.0°E), Svalbard

Space Weather, Volume 23, Issue 5, May 2025.
Abstract This study presents the time variability of metastable orthohelium, He23S $\mathrm{H}\mathrm{e}\left({\mathrm{2}}^{\mathrm{3}}\mathrm{S}\right)$, in the polar region associated with a geomagnetic storm. A data set consisting of continuous observations of He23S $\mathrm{H}\mathrm{e}\left({\mathrm{2}}^{\mathrm{3}}\mathrm{S}\right)$ airglow ...
Takanori Nishiyama, Masato Kagitani, Tikemani Bag, Takuo T. Tsuda, Yuki Iwasa, Yasunobu Ogawa, Fred Sigernes   +6 more
wiley   +1 more source

Bivariate Extreme Value Analysis for Space Weather Risk Assessment: Solar Wind—Magnetosphere Driving in the Terrestrial System

Space Weather, Volume 23, Issue 5, May 2025.
Abstract As society moves toward greater dependence on technology, understanding and predicting extreme Space Weather becomes increasingly important. Indeed, the complex, simultaneous interplay between multiple phenomena can unpack further insight into Space Weather effects.
Alexandra Ruth Fogg, D. Healy, C. M. Jackman, A. C. Parnell, M. J. Rutala, S. C. McEntee, S. J. Walker, P. T. Gallagher, C. F. Bowers   +8 more
wiley   +1 more source

Modeling Earth's Global Electron Density by Using LSTM‐Attention Neural Networks

Space Weather, Volume 23, Issue 5, May 2025.
Abstract The electron number density is an important physical quantity in the Earth's inner magnetosphere. Modeling the long‐term evolution of electron number density is critical to obtain a physical understanding of the inner magnetosphere dynamics. The plasmaspheric plume is an important density structure, but it's difficult to capture the structure ...
Hang Tian, Zhigang Yuan, Xiongdong Yu
wiley   +1 more source

Studying the Inner Heliosphere Using Radio Signals Transmitted From Spacecraft Orbiting Mars

Space Weather, Volume 23, Issue 5, May 2025.
Abstract In this campaign, we used very long baseline interferometry (VLBI) radio telescopes to track the carrier radio signal transmitted from spacecraft orbiting Mars during the Mars solar conjunction. The campaign extended from September 6th $6\text{th}$ to November 6th $6\text{th}$ 2021 and targeted the Mars Express (MEX) and Tianwen‐1 (TIW ...
J. Edwards, G. Molera Calvés, P. Kummamuru, N. M. M. Said, M. Ma   +4 more
wiley   +1 more source

Imbalanced Regression Artificial Neural Network Model for Auroral Electrojet Indices (IRANNA): Can We Predict Strong Events?

Space Weather, Volume 23, Issue 5, May 2025.
Abstract We develop an Imbalanced Regression Artificial Neural Network model for the Auroral electrojet index (IRANNA) to predict the SuperMAG SML index, addressing the heavily imbalanced distribution of the SML data set. The data set contains mostly quiet‐time values of lesser importance and very few strong‐to‐extreme values of interest, such as those
Xiangning Chu, Lucas Jia, Robert L. McPherron, Xinlin Li, Jacob Bortnik   +4 more
wiley   +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

Lunar Oscillations in the D-Layer of the Ionosphere [PDF]

, 1949
E.V. Appleton, W.J.G. Beynon
openalex   +1 more source

Effect of the Planet Shine on the Corona: Application to the Venusian Hot Oxygen

Journal of Geophysical Research: Space Physics, Volume 130, Issue 5, May 2025.
Abstract This paper presents a new derivation of the hot oxygen density in the Venusian upper exosphere (above 500 km) from Pioneer Venus Orbiter (PVO) ultraviolet spectrometer data, considering the effect of the solar photons backscattered by the oxygen atoms below ∼300 km (Venus shine), not included in past analysis, with a resonant scattering ...
J.‐Y. Chaufray, S. Carberry Mogan, J. Deighan   +2 more
wiley   +1 more source