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Near-equatorial great enhancements of the quasi-trapped >30 keV electrons at low-altitudes are studied during strong geomagnetic storms. We have found that the transient phenomenon often began at the morning and was capable to live several…

Space Physics · Physics 2013-01-14 A. V. Suvorova , A. V. Dmitriev , L. -C. Tsai

Basic properties of the mid-latitude large-scale traveling ionospheric disturbances (LS TIDs) during the maximum phase of a strong magnetic storm of 6-8 April 2000 are shown. Total electron content (TEC) variations were studied by using…

During a solar flare, the fluxes in various lines and continua of the solar spectrum increase, leading to enhanced ionization of the illuminated part of the Earth's ionosphere and an increase in the total electron content (TEC). It has been…

Space Physics · Physics 2025-09-01 S. Z. Bekker , R. O. Milligan , I. A. Ryakhovsky

Ionospheric tomography using GPS data has been reported in the literature and even the application to radar altimeter calibration was succesfully carried out in a recent work. We here present a new software tool, called Global Ionospheric…

Geophysics · Physics 2007-05-23 A. Flores , G. Ruffini , A. Rius , E. Cardellach

Geomagnetic storms drive complex ionospheric responses through coupled electrodynamic and thermospheric processes, yet attributing storm-time TEC perturbations to specific mechanisms remains challenging. We investigate the ionospheric…

Geophysics · Physics 2026-03-17 Pan Xiong , Jianghe Chen , Xuhui Shen , Tong Liu , Angelo De Santis , Sergey Pulinets

Aims: We studied the precipitable water vapour (PWV) content near Cerro Armazones and discuss the potential use of our technique of modelling the telluric absorbtion lines for the investigation of other molecular layers. The site is…

Instrumentation and Methods for Astrophysics · Physics 2016-03-16 Masha Lakicevic , Stefan Kimeswenger , Stefan Noll , Wolfgang Kausch , Stefanie Unterguggenberger , Florian Kerber

The Electric Propulsion Electrostatic Analyzer Experiment (\`EP\`EE) is a compact ion energy bandpass filter deployed on the International Space Station (ISS) in March 2023 and providing continuous measurements through April 2024. This…

During a midlatitude spread F (MSF) event, data was collected to investigate the circumstances that may lead to MSF. Using the Total Electron Content (TEC) derived from the NCAT-SCINDA GPS station and the Continuous Operating Reference…

Space Physics · Physics 2010-06-24 Galen Smith , Abebe Kebede

Structure imprinted in foreground extragalactic point sources by ionospheric refraction has the potential to contaminate Epoch of Reionisation (EoR) power spectra of the 21~cm emission line of neutral hydrogen. The alteration of the spatial…

Electron-capture (EC) unstable species in Galactic cosmic rays constrain the time elapsed between nucleosynthesis and acceleration. They have also been advocated as tracers of reacceleration or gas inhomogeneities during their transport.…

High Energy Astrophysical Phenomena · Physics 2026-02-09 M. Borchiellini , D. Maurin , M. Vecchi

This paper discusses the GPS (Global Positioning System) observed TEC (Total Electron Content) variations prior to the M 9.0 Great Tohoku (Japan, Sendai) March 11, 2011 and M 7.1 Oct. 23, 2011 Turkey Van earthquakes as possible…

Space Physics · Physics 2012-05-29 O. V. Zolotov , A. A. Namgaladze , B. E. Prokhorov

The increasing frequency of extreme temperature events, such as daily maximum temperature ($T_x$) records, underscores the need for robust tools to understand their drivers and predict their occurrence. Previous studies have identified…

We identified a new class of mid-latitude medium-scale traveling ionospheric disturbances (MS TIDs), viz. traveling wave packets (TWPs) of total electron content (TEC) disturbances. For the first time, the morphology of TWPs is presented…

Geophysics · Physics 2015-06-26 E. L. Afraimovich , N. P. Perevalova , S. V. Voyeikov

We use long-term electron and proton in-situ measurements made by the CXD particle instruments, developed by Los Alamos National Laboratory and carried on board GPS satellites, to determine total ionizing dose (TID) values and daily/yearly…

Space Physics · Physics 2020-12-02 Yue Chen , Matthew R. Carver , Steven K. Morley , Andrew S. Hoover

A comparative statistical analysis of AATR and WTEC indices was conducted based on data from the ISTP SB RAS GNSS receivers network. It is shown that at high levels of ionospheric disturbance (for WTEC > 0.1 TECU), the AATR index is…

Geophysics · Physics 2020-04-13 Oleg I. Berngardt , Sergey V. Voeykov , Natalia P. Perevalova

The Earth's electric field, recorded by two different and distant monitoring sites located in Greece, is analyzed in terms of monochromatic signals (T=24h). The analysis is based on the mapping procedures borrowed from the study of…

Geophysics · Physics 2008-10-02 C. Thanassoulas , V. Klentos , G. Verveniotis

The results of a climatological study of ionospheric disturbances derived from observations of cosmic sources from the Very Large Array (VLA) Low-frequency Sky Survey (VLSS) are presented. We have used the ionospheric corrections applied to…

Space Physics · Physics 2015-06-11 J. F. Helmboldt , W. M. Lane , W. D. Cotton

This work presents, for the first time, the analysis of the occurrence of ionospheric irregularities during geomagnetic storms at Tucum\'an-Argentina, a low latitude station in the Southern American longitudinal sector ( 26.9 {\deg} S,…

Space Physics · Physics 2021-01-14 Gilda González

Electron energy-loss spectroscopy (EELS) can measure similar information to X-ray, UV-Vis, and IR spectroscopies but with atomic resolution and increased scattering cross sections. Recent advances in electron monochromators have expanded…

Chemical Physics · Physics 2024-04-26 Ye-Jin Kim , Levi D. Palmer , Wonseok Lee , Nicholas J. Heller , Scott K. Cushing

We present a review of the current experimental and theoretical understanding of electron transport in noble liquids. Special attention is given to recent measurements that coincide with the development of time projection chambers (TPCs)…

Applied Physics · Physics 2025-04-24 G. J. Boyle , N. A. Garland , D. L. Muccignat , I. Simonović , D. Bošnjaković , S. Dujko , R. D. White