Results 51 to 60 of about 1,756 (218)

Ionospheric Mechanisms Leading to Plasma‐Bubble Zonal Drift Reversal and Deformation During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 10, October 2026.
Abstract We present a multi‐instrument analysis of the ionospheric response to the intense geomagnetic storm of 12 November 2025 over the American sector, with emphasis on the longitudinally asymmetric deformation, latitudinal expansion, and zonal drift reversal of equatorial plasma bubbles (EPBs).
G. A. S. Picanço, I. Galkin, P. Song, E. Astafyeva, L. C. A. Resende, J. P. Marchezi, L. A. da Silva, P. R. Fagundes, C. M. Denardini, C. Martinis, A. M. Santos, V. G. Pillat, A. J. Coster, A. L. Christovam, S. R. Laranja, M. A. M. Lopes   +15 more
wiley   +1 more source

Highlighting the F2 trace on an ionogram to improve Autoscala performance

, 2010
This work describes a linear regression based method for highlighting the cuspidal trace on an ionogram. This method was initially thought to smooth out cases in which the autoscaling of the ionogram performed by Autoscala was erroneous because the F2 ...
Scotto, C., M. Pezzopane, C. Scotto, Pezzopane, M.   +3 more
core   +1 more source

Type‐III Solar Radio Bursts at Mars: A 16.5‐Year Catalog From Mars Express‐MARSIS at 0.1–5.5 MHz

Space Weather, Volume 24, Issue 10, October 2026.
Abstract The most intense radio feature in the Solar System are the solar Type‐III radio bursts, which are associated with electron beams that propagate along open magnetic field lines. Although solar radio bursts have been studied since the 1940s, observations remain mainly restricted within 1 AU.
Beatriz Sánchez‐Cano, Samuel Carter, Mark Lester, Olivier Witasse, Caitriona M. Jackman, Sophie Musset, Baptiste Cecconi, Louis Siebenaler, Simon Joyce, Luis Alberto Cañizares, Andrea Cicchetti, Alexandra R. Fogg, Peter Gallagher, Christopher Gerekos, Yuki Harada, Alessandro Ippolito, Immanuel Jebaraj, Dikshita Meggi, Roberto Orosei, Hermann Opgenoorth, Jeff Plaut, Catherine Regan, Katerina Stergiopoulou   +22 more
wiley   +1 more source

On the Origin of Summer Sporadic E Periodicities at Midlatitudes

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Summertime midlatitude sporadic E (Es) layers exhibit daily periodicities whose underlying physical causes remain to be fully identified. We investigate the origin of these periodicities by analyzing an 11‐year data set (2007–2017) comprising ionosonde measurements, FORMOSAT‐3/COSMIC radio occultation (RO) observations, and WACCM‐X neutral ...
Xu Yan, Hongtao Cai, Yusong Qin, Chao Xiong, Jiawei Zhou, Hongwen Xu, Lubing Yang   +6 more
wiley   +1 more source

An Automatic CADI’s Ionogram Scaling Software Tool for Large Ionograms Data Analytics [PDF]

IEEE Access, 2022
T. Venkateswara Rao, Miriyala Sridhar, Devanaboyina Venkata Ratnam   +2 more
openaire   +2 more sources

Synthetic‐Data‐Driven Supervised Learning for Pixel‐Wise Recognition of Ionogram Layer Traces

Journal of Geophysical Research: Machine Learning and Computation
The significance of automatic ionogram data interpretation is growing with the increasing number of ionosondes operating at minute‐level cadence. In recent years, deep‐learning models have substantially advanced ionogram pattern recognition.
Ruslan Sherstyukov, Alexander Kozlovsky, Thomas Ulich, Samson Moges, Thomas Leyser   +4 more
doaj   +1 more source

Diagnostics of HF radio channel: based on data from backscatter ionospheric sounding by continuous chirp signal

Solar-Terrestrial Physics, 2018
Backscatter ionospheric sounding (BIS) is a powerful tool for monitoring and predicting conditions of operation of HF communication systems. The BIS method is adopted to determine coverage areas of radio waves and maximum usable radio frequencies ...
Ponomarchuk S.N., Grozov V.P., Kotovich G.V., Kurkin V.I., Penzin M.S.   +4 more
doaj   +1 more source

Doppler vertical sounding of the ionosphere at the Akademik Vernadsky station

Український антарктичний журнал, 2020
The paper aims at providing the technical information about Doppler vertical sounding of the ionosphere that started at the Ukrainian Antarctic Akademik Vernadsky station since 2017; developing the technique for processing and visualization of data of ...
A. Zalizovski, O. Koloskov, A. Kashcheyev, S. Kashcheyev, Y. Yampolski, O. Charkina   +5 more
doaj   +1 more source

Validation of Global Ionospheric Specification (GIS) Electron Density Measurements During Solar Minimum to Solar Maximum Under Quiet and Disturbed Geomagnetic Conditions

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Global Ionospheric Specification (GIS) three‐dimensional electron density profiles constructed by assimilating the line‐of‐sight total electron content (TEC) from global navigation satellite system (GNSS) radio occultation (RO) measurements by FORMOSAT‐7/COSMIC‐2 (F7/C2) and ground‐based receiver network from international GNSS service ...
P. K. Rajesh, C. H. Charles Lin, C. Y. Lin, T. Matsuo, H. Jin, S. Perwitasari, M. Nishioka, Chao‐Yen Chen   +7 more
wiley   +1 more source

Data Services Upgrade: Perfecting the ISIS-I Topside Digital Ionogram Database [PDF]

, 2015
The ionospheric topside sounders of the International Satellites for Ionospheric Studies (ISIS) program were designed as analog systems. More than 16,000 of the original telemetry tapes from three satellites were used to produce topside digital ionograms,
Huang, Xueqin, Benson, Robert F., Fung, Shing. F., Chu, Philip, Wang, Yongli, Bilitza, Dieter, Truhlik, Vladimir   +6 more
core