Results 141 to 150 of about 2,651 (210)

Soft Proton Environment Modeling for SMILE Using XGBoost and Solar Cycle–Informed Synthetic Data Sets

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Soft proton contamination presents a persistent threat to the performance of space‐based X‐ray observatories such as ESA's upcoming Solar‐wind Magnetosphere Ionosphere Link Explorer (SMILE). This study develops a machine‐learning framework for modeling soft proton fluxes in the 92.2–159.7 keV range, tailored to SMILE's elliptical, highly ...
Simon Mischel, Elena A. Kronberg, C. P. Escoubet   +2 more
wiley   +1 more source

Venus reawakening. [PDF]

Nat Commun
Maia J, Lefèvre M.
europepmc   +1 more source

New Observations of Cosmic Noise Absorption in the South American Magnetic Anomaly (SAMA) Using a Next‐Generation Riometer

Space Weather, Volume 24, Issue 7, July 2026.
Abstract This study reports the first observations of cosmic noise power (CNP) and cosmic noise absorption (CNA) obtained with a next‐generation riometer installed at the Southern Space Observatory (SSO/INPE) in Brazil, located within the South American Magnetic Anomaly (SAMA).
J. Moro, E. Correia, C. M. Wrasse, J. R. Costa, J. V. Bageston, C. M. Denardini, A. J. Valcorte, L. C. A. Resende, A. M. Santos, L. A. da Silva, J. P. Marchezi, T. S. Trondsen   +11 more
wiley   +1 more source

Enhanced Flexible Vacuum-Ultraviolet Photodetectors Based on Hexagonal Boron Nitride Nanosheets via Al Nanoparticles. [PDF]

Nanomaterials (Basel)
Chen Y, Li J, Li Q, Fang W, Liu H, Lin Z, Wang T, Yun F.   +7 more
europepmc   +1 more source

Supporting Informed Shutter Operations for SMILE's SXI Using Ensemble Classifiers for Soft Proton High Flux Period Predictions

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Satellite X‐ray imagers are highly vulnerable to contamination by soft protons (∼100 keV), which can trigger spurious charge‐coupled device events and force interruptions in observations. For XMM‐Newton, such contamination reduced usable science time by ∼40%.
Simon Mischel, Elena A. Kronberg, C. P. Escoubet   +2 more
wiley   +1 more source

Redirection and reshaping of intense extreme-ultraviolet radiation. [PDF]

Sci Adv
He Y, Magunia A, Mandal H, Mourtada MA, Kleine C, Saha A, Rebholz M, Borisova GD, Hedewig L, Lindenblatt H, Trost F, Frühling U, Papadopoulou CC, Appi E, Düsterer S, Lang T, Alisauskas S, Heyl CM, Palutke S, Braune M, Bömer C, Krebs D, Vinci D, Mosel P, Biesterfeld P, Hartl I, Moshammer R, Kovacev M, Ueda K, Gaarde MB, Ott C, Pfeifer T.   +31 more
europepmc   +1 more source

QEUV vs. Other EUV Proxies: A Re‐Evaluation of Solar EUV Proxies for Thermospheric and Space Weather Investigations

Space Weather, Volume 24, Issue 7, July 2026.
Abstract F10.7, Mg II, and F30 are widely used proxies for variability in solar Extreme UltraViolet (EUV, 5–120 nm) irradiance. An alternative proxy for solar EUV variability is QEUV, an indirect measure of total solar EUV irradiance, retrieved from observations of Earth's Far UltraViolet (FUV, 120–300 nm) airglow and from empirically modeled solar EUV
F. I. Laskar, W. K. Peterson, P. C. Chamberlin, R. W. Eastes, T. E. Berger, K. R. Greer, J. S. Evans, A. W. Yau   +7 more
wiley   +1 more source

Accurate determination of chemical abundances near a supermassive black hole. [PDF]

Nat Astron
XRISM Collaboration.
europepmc   +1 more source

Introduction to TREx‐ATM V2.0: A Versatile Model of Auroral Transport and Its Effects in the Ionosphere

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Auroral transport models (ATMs) play an important role in quantitative studies of optical auroras, their driving mechanisms, and their effects on the ionosphere and thermosphere. TREx‐ATM was initially developed as the support model for the Transition Region Explorer (TREx) mission, and has gained increasing applications in the community in ...
Jun Liang, E. Donovan, E. Spanswick, C. Gabrielse, D. Chaddock, J. Houghton   +5 more
wiley   +1 more source

Howard University Beltsville Campus Ozonesonde Record: Data Homogenization and Uncertainties

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Ensuring the quality and consistency of multidecadal electrochemical concentration cell (ECC) ozonesonde records is essential because changes in sonde instrumentation, sensing solutions, operating procedures, and data‐processing methods can introduce biases that compromise their suitability for trend analyses and model/satellite evaluation ...
Joshua A. D. Richards, Ryan M. Stauffer, Debra E. Kollonige, Anne M. Thompson, Belay Demoz, Ricardo K. Sakai, Adrian Flores   +6 more
wiley   +1 more source