Results 71 to 80 of about 2,215 (219)

Space Weather Disrupts Low‐Latitude Network RTK: Evidence From LSTIDs During June 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 6, June 2026.
Abstract The geomagnetic storm on 1 June 2025 generated pronounced large‐scale traveling ionospheric disturbances (LSTIDs) over China, captured by dense GNSS networks. It has been unclear whether network real‐time kinematic (NRTK) positioning, which relies on spatial interpolation from multiple reference stations, remains effective under such extreme ...
Tong Liu, Jianghe Chen, Wenfeng Nie, Zhibin Yu, Rui Song, Wu Chen, Pan Xiong, Tianhe Xu, Bo Chen   +8 more
wiley   +1 more source

Daytime Ionospheric F‐Region Topside Irregularities Associated With Significant Density Enhancement at Low Latitudes During the 12 November 2025 Magnetic Storm

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract In this study, daytime F‐region irregularities were observed at low latitudes during the main phase of the 12 November 2025 strong magnetic storm, causing intense very high frequency radar echoes ranging hundreds of kilometers in altitude.
Wenjie Sun, Guozhu Li, Guofeng Dai, Haiyong Xie, Lianhuan Hu, Biqiang Zhao, Zequan Wang, Jianfei Liu, Xiukuan Zhao, Yi Li, Baiqi Ning   +10 more
wiley   +1 more source

L-band scintillations and calibrated total electron content gradients over Brazil during the last solar maximum

Journal of Space Weather and Space Climate, 2015
This work presents a contribution to the understanding of the ionospheric triggering of L-band scintillation in the region over São Paulo state in Brazil, under high solar activity.
Cesaroni Claudio, Spogli Luca, Alfonsi Lucilla, De Franceschi Giorgiana, Ciraolo Luigi, Galera Monico Joao Francisco, Scotto Carlo, Romano Vincenzo, Aquino Marcio, Bougard Bruno   +9 more
doaj   +1 more source

Detection of Equatorial Plasma Bubbles Using the COSMIC‐2 Rate of TEC Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Equatorial plasma bubbles (EPBs) are large‐scale plasma depletion structures that can disrupt Global Navigation Satellite Systems (GNSS) and other space‐based technologies. Several instruments have been employed to study EPB dynamics, with Total Electron Content (TEC) and Rate of TEC change Index (ROTI) data standing out as valuable parameters
Ana L. Christovam, Fabricio S. Prol, Marcio T. A. H. Muella   +2 more
wiley   +1 more source

GNSS ionospheric scintillation studies in Singapore

, 2015
Ionospheric scintillation has been a challenge for Global Navigation Satellites System (GNSS) application especially in equatorial region. Ionosphere in around equatorial region is known to have unique characteristic.
Dhimas Sentanu Murti
core   +1 more source

Nine‐Year L‐Band InSAR Time Series of Tectonic and Non‐Tectonic Surface Deformation in Northern California

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.
Abstract This study evaluates the performance of ALOS‐2 ScanSAR time series for resolving tectonic, volcanic, hydrologic, and geomorphic deformation across Northern California. Beginning in 2021, ALOS‐2 acquired ScanSAR data with a 14‐day repeat interval over the region, providing the closest available analog to the recently launched NISAR mission. The
D. Lindsay, R. Bürgmann, K. Materna, E. J. Fielding   +3 more
wiley   +1 more source

Ionospheric scintillation modeling II. Theoretical study of power spectral densities of ionospheric scintillation

Journal of Space Weather and Space Climate
An electromagnetic signal that has passed through a layer of ionospheric irregularities can undergo significant modifications. The Power Spectral Density (PSD) of such a signal can then be rich in information about the medium through which it has passed. Thus, this paper is dedicated to the theoretical study of the PSD of the log-amplitude and phase of
Grégory Morel, Vincent Fabbro, Olivier Boisot, Laurent Féral   +3 more
openaire   +1 more source

Smartphone Carrier Phase TEC: A Study Across Ionospheric Spatio‐Temporal Scales

Space Weather, Volume 24, Issue 5, May 2026.
Abstract This study explores the potential of dual‐frequency smartphones as accessible tools for citizen science in ionospheric research. While prior work by Smith et al. (2024, https://doi.org/10.1038/s41586‐024‐08072‐x) demonstrated global ionospheric monitoring using aggregated pseudorange Total Electron Content (TEC) data from millions of Android ...
Nina Servan‐Schreiber, Vincent Ledvina, Joshua Semeter, Jeremy Kuzub, Michael Hirsch, Meghan LeMay, Kshitij Duraphe, Jen‐Hsin Chiao, Yafei Chen, Joaquín Díaz Peña   +9 more
wiley   +1 more source

Power Spectra of Ionospheric Scintillations

Advanced Electromagnetics, 2017
Second order statistical moments of the phase fluctuationsare obtained taking into account the boundary condition,diffraction effects and polarization coefficients of theordinary and extraordinary waves. The variance and thecorrelation function are calculated for arbitrary 3D spectralfunction of electron density fluctuations containing bothanisotropic ...
Jandieri, George, Ishimaru, Akira, Rawat, Banmali, Kharshiladze, Oleg, Diasamidze, Zhuzhuna   +4 more
openaire   +4 more sources

Ionospheric Scintillation Modelling [PDF]

, 1981
153-159The phenomenon of ionospheric scintillations has long been observed by radio astronomers and physicists. The observations have provided valuable information towards the (qualitative) morphology of the phenomenon.
Reddy, B M, Pasricha, P K
core