Results 131 to 140 of about 103,965 (278)

Quantifying the Impact of Solar Irradiance Uncertainty on Thermosphere‐Ionosphere Variability Using Ensemble Forecasts

open access: yesSpace Weather, Volume 23, Issue 12, December 2025.
Abstract This study investigates the sensitivity of the thermosphere and ionosphere to variations in solar spectral irradiance. Using data from the SDO and SORCE missions collected between 2010 and 2018, we quantified the variability and uncertainty of solar spectral irradiance across wavelengths from 0.1 to 190 nm and developed a data‐driven method to
C.‐T. Hsu, N. M. Pedatella
wiley   +1 more source

Global Validation of the Data‐Assimilative VERB‐3D Code for the Radiation Belts

open access: yesSpace Weather, Volume 23, Issue 12, December 2025.
Abstract Electrons within Earth's radiation belts exhibit large variability in space and time during geomagnetic storms, which could potentially damage satellites and harm astronauts in space. Physics‐based models describe the evolution of energetic electrons in the radiation belts, but they may suffer from uncertainties and errors, particularly in the
Marina García Peñaranda   +12 more
wiley   +1 more source

Premature Reentry of the Binar CubeSats Due To Underestimation of Solar and Geomagnetic Activities and Its Implication for Importance of Medium‐ and Long‐Term Space Weather Forecasts

open access: yesSpace Weather, Volume 23, Issue 12, December 2025.
Abstract The rapid development of low‐Earth orbit (LEO) satellites brings increased attention to spacecraft collisions, space debris, orbital decay, and satellite reentry. Neutral density and associated drag force on the satellite orbits elevate space risks, significantly determined by space weather disturbances, particularly geomagnetic storms.
Xin Wang   +9 more
wiley   +1 more source

Unusual SuperDARN Backscatter During the 11 May 2024 Geomagnetic Storm

open access: yesSpace Weather, Volume 23, Issue 12, December 2025.
Abstract A geomagnetic storm, one of the largest in this solar cycle, was launched on 10 May 2024, producing spectacular auroral displays that could be observed across the continental United States (US) at middle and low latitudes. In this study, we focus on a brief 20‐min interval during the peak of the storm when the Sym‐H index dropped to ∼ ${\sim} $
B. S. R. Kunduri   +9 more
wiley   +1 more source

Probing Jupiter's Atmosphere Through Juno Radio Occultations: Methodology and Initial Observations

open access: yesGeophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract This paper presents an analysis of Juno's first radio occultation experiments. Relying on two‐way radio links in the X‐ and Ka‐bands, we processed data from NASA's Deep Space Network antennas through a ray‐tracing inversion algorithm.
Andrea Caruso   +15 more
wiley   +1 more source

Global Occurrence of Kelvin‐Helmholtz Vortices at Mars

open access: yesGeophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract We analyzed six Kelvin‐Helmholtz (K‐H) vortex events from Mars Atmosphere and Volatile EvolutioN (MAVEN) measurements. We found that fully developed vortices can occur at Mars' equatorial flanks and in the southern hemisphere, while they were previously observed only in the northern hemisphere.
Z. Koh   +9 more
wiley   +1 more source

Magnetopause Reconnection Voltages During the Voyager 2 Flyby of Uranus

open access: yesGeophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Uranus' magnetosphere presents a unique system to examine global magnetic reconnection processes due to its location far from the Sun. We assess reconnection effectiveness during Voyager 2's Uranus flyby, using a physics‐based analytical model to calculate reconnection voltages applied to the magnetopause.
S. Zomerdijk‐Russell, J. M. Jasinski
wiley   +1 more source

Solar wind ion charge state distributions and compound cross sections for solar wind charge exchange X-ray emission

open access: yesEarth and Planetary Physics
Solar Wind Charge eXchange X-ray (SWCX) emission in the heliosphere and Earth's exosphere is a hard to avoid signal in soft X-ray observations of astrophysical targets.
Dimitra Koutroumpa
doaj   +1 more source

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