Results 31 to 40 of about 765 (188)

First Results of a New Inversion Tool for Thermospheric Neutral Mass Density Computations During Severe Geomagnetic Storms

AGU Advances, Volume 7, Issue 3, June 2026.
Abstract In Low Earth Orbit (LEO), atmospheric drag is the dominant source of trajectory prediction error below approximately 700 km altitude, primarily due to inaccuracies in thermospheric density models. This work presents a method for temporally deconvolving Energy Dissipation Rates (EDRs) to produce single‐satellite density estimates, which can be ...
S. Mutschler, M. Pilinski, E. Zesta, D. M. Oliveira, K. Delano, K. Garcia‐Sage, W. K. Tobiska   +6 more
wiley   +1 more source

Investigating Potential Benefits of Future Sub‐L1 Missions With STEREO‐A

Space Weather, Volume 24, Issue 6, June 2026.
Abstract We present the first statistical study of geomagnetic storm forecasting using in situ data from the STEREO‐A spacecraft as a sub‐L1 monitor. Between November 2022 and June 2024, STEREO‐A crossed the Sun–Earth line, covering longitudinal and radial separations of ±15° $\pm 15{}^{\circ}$ from the Sun–Earth line and 0.01–0.06 au from Earth.
E. Weiler, E. E. Davies, C. Möstl, N. Lugaz, A. Veronig, R. L. Bailey, M. A. Reiss   +6 more
wiley   +1 more source

LEO‐DOS Absorbed Dose Observations During the May 2024 Geomagnetic Superstorm

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Low‐Earth Orbit Space Radiation Dosimeter (LEO‐DOS) onboard Next‐Generation Satellite II (NEXTSat‐2) measured absorbed dose rate variations during the May 2024 geomagnetic superstorm. The observations show deep storm‐time penetration of solar energetic particle (SEP) spanning L ≈ 2–10, a pronounced enhancement near L ≈ 3 consistent with ...
Jongil Jung, Young‐Sil Kwak, Uk‐Won Nam, Suyeon Oh, Won‐Kee Park, Sukwon Youn, Jaeyoung Kwak, Jongdae Sohn, Bongkon Moon, Jaejin Lee, Sunghwan Kim, Sung‐Joon Ye   +11 more
wiley   +1 more source

Stochastic bifurcation phenomenon and multistable behaviors in a fractional Rayleigh–Duffing oscillator under recycling noise

Frontiers in Physics
This study examines the stochastic bifurcation phenomenon in a fractional and multistable Rayleigh–Duffing oscillator subjected to recycling noise excitation.
Ya-Jie Li, Zhi-Qiang Wu, Zhi-Qiang Wu, Yong-Tao Sun, Yong-Tao Sun, Xiang-Yun Zhang, Sheng-Li Chen   +6 more
doaj   +1 more source

Initial Atmospheric Waves Experiment (AWE) Imaging Analyses: Gravity Wave Sources, Temperatures, Pseudomomentum Fluxes, and Horizontal Wavenumber Spectra at the OH Layer

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract The NASA Atmospheric Waves Experiment (AWE) employs an OH imager that began measurements aboard the International Space Station (ISS) on 22 November 2023. The motivation for AWE was to quantify gravity wave (GW) responses to diverse sources and their influences extending into the mesosphere and higher altitudes.
David C. Fritts, Robert G. Stockwell, Thomas S. Lund, P.‐Dominique Pautet, Kaoru Sato, Dai Koshin, Michael J. Taylor, Ludger Scherliess   +7 more
wiley   +1 more source

0+ states and collective bands in deformed actinide nuclei [PDF]

Ядерна фізика та енергетика, 2007
By means of the (p, t) reaction we studied the excitation spectra of 0+ states in the deformed nuclei 228Th, 230Th, and 232U, using the Q3D magnetic spectrograph facility at the Munich tandem accelerator.
A. I. Levon, G. Graw, S. Christen, Y. Eisermann, C. Günther, R. Hertenberger, J. Jolie, O. Möller, P.Thirolf, D. Tonev, H.-F. Wirth, N. V. Zamfir   +11 more
doaj  

A Robust Empirical Relationship Between Speed and Turbulence Energy in the Near‐Earth Solar Wind

Space Weather, Volume 24, Issue 5, May 2026.
Abstract The connection between turbulence and solar‐wind acceleration, long known in space physics, is further developed in this study by establishing a robust empirical law that relates the bulk‐flow speed to the magnetohydrodynamic‐scale fluctuation energy in the plasma. The model is based on analysis of 25 years of near‐Earth observations by NASA's
Rohit Chhiber, Yanwen Wang, Manuel E. Cuesta, Jiaming Wang, Sohom Roy   +4 more
wiley   +1 more source

On the North‐South Symmetry of the Chorus Source Region: Conjugate Observations by the Cluster Spacecraft

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Chorus waves are arguably the most important electromagnetic emissions in the Earth's magnetosphere, being responsible for both energization and loss of radiation belt electrons. Chorus generation, inherently related to nonlinear wave‐particle interactions, as well as the frequency‐time shapes of individual elements forming it, are not yet ...
F. Němec, O. Santolík, J. S. Pickett
wiley   +1 more source

Validation of CIPS Version 5.20 PMC Data

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract The Cloud Imaging and Particle Size (CIPS) instrument operated onboard the NASA Aeronomy of Ice in the Mesosphere (AIM) satellite from April 2007 to March 2023. CIPS was a nadir‐viewing UV imager that made global measurements of scattered sunlight at high spatial resolution.
Jerry D. Lumpe, Justin Carstens, Cora E. Randall, V. Lynn Harvey, Scott Bailey, Shourya Mukherjee, Takuo Tsuda, Yuta Hozumi   +7 more
wiley   +1 more source

Spontaneous Fluctuations of Human Pupil Reflect Central Autonomic Rhythms

, 2000
:Aim of this study is to assess whether and to what extent LF and HF rhythms contribute to spontaneous pupil diameter fluctuations at rest and during sympathetic activation by Head-Up Tilt Test 70°.
F. Censi, S. Cerutti, G. Calcagnini, S. Lino   +3 more
core   +1 more source