Results 41 to 50 of about 3,502 (180)

Estimation of the parameters of traveling ionospheric disturbances using a chirp-ionosondes network

Учёные записки Казанского университета: Серия Физико-математические науки, 2022
In this article, the results of our observations of traveling ionospheric disturbances are discussed using the data from a network of chirp stations for oblique ionospheric sounding in December 2019. All observations were made with the same type of chirp
A.A. Kolchev, E.Yu. Zykov, F.I. Vybornov, A.G. Chernov, V.V. Shumaev   +4 more
doaj   +1 more source

Evolution of the ionosonde

Annals of Geophysics, 1998
Almost 60 years development of ionosondes and their data processing capabilities are described with emphasis on the authors contributions from the early beginnings of ionospheric studies to the latest digital equipment to be used for the exploration of the magnetosphere.
openaire   +4 more sources

The Reliability of HF Propagation Links Over Canada During Absorption Events

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Natural Resources Canada monitors space weather impacts to high frequency radio wave propagation using several High Frequency transmitter/receiver links across Canada. HF data received in Alert from a transmitter in Ottawa are examined in this study.
R. G. Gillies, E. Spanswick, R. Fiori, F. Ghaly, T. Cameron, S. Skone   +5 more
wiley   +1 more source

TGO Ramfjordmoen Ionosonde Data November 2016

, 2019
About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from November 01-30, 2016.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at ...
Tromsø Geophysical Observatory
core   +1 more source

Equatorial F‐Region Responses to the Main Phase of the 10 May 2024 Geomagnetic Storm Over the South American Sector: Observations and Model Simulations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study examines the equatorial ionospheric response over the South American sector during the onset of the extreme 2024 Mother's Day geomagnetic storm, which began at ∼17 UT on 10 May and reached the G5 level. Pronounced disturbances in ionospheric electrodynamics were observed under both daytime and nighttime conditions. Variations in the
A. M. Santos, J. R. Souza, I. S. Batista, M. Bravo, C. G. M. Brum, J. H. A. Sobral, S. S. Chen, R. Sá, L. C. A. Resende, J. Moro, P. R. Jauer, L. da Silva, D. Medeiros, P. A. B. Nogueira, E. A. Kherani, V. F. Andrioli, M. A. Abdu, G. S. Adeniran, R. de Jesus, A. A. Pimenta, G. Yang, F. A. de Souza   +21 more
wiley   +1 more source

GPS Radio Occultation Method for Ionosphere TEC Monitoring [PDF]

فصلنامه علوم و فناوری فضایی, 2013
In this paper GPS radio occultation has been introduced as a way to extract the electron density of the ionosphere. A GPS radio occultation occurs when a receiver on-board a LEO spacecraft tracks a GPS satellite as it sets or rises through the earth’s ...
Sh. Amiri, M. Fahami
doaj  

Characterization of High‐Frequency GNSS Total Electron Content Variations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Global Navigation Satellite System (GNSS)–derived Total Electron Content (TEC) is widely used to investigate ionospheric variability, but has primarily been applied to low‐frequency fluctuations. Here we present a long‐term statistical characterization of high‐frequency (30–500 mHz) TEC variations using multi‐constellation GNSS data from 11 ...
J. Pérez‐Coll Jiménez, N. Ivchenko, N. Partamies, M. Håkansson   +3 more
wiley   +1 more source

TGO Ramfjordmoen Ionosonde Data July 2015

, 2019
About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from July 01-31, 2015.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at ...
Tromsø Geophysical Observatory
core   +1 more source

Coupled Thermosphere–Ionosphere–Plasmasphere Disturbances During the April 2023 Geomagnetic Storm: A Ground‐Based Multiparametric Study Across the American and European Sectors

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The April 2023 geomagnetic storm significantly impacted the thermosphere‐ionosphere system, particularly over South America and midlatitude regions. This study analyzes ground‐based geomagnetic and ionospheric data, alongside Swarm satellite measurements, to investigate the physical mechanisms driven by intense solar wind energy input ...
L. Perrone, M. Regi, G. Carnevale, C. Scotto, D. Sabbagh, A. Ippolito, A. Del Corpo, D. Sciarra, B. Heilig   +8 more
wiley   +1 more source

TGO Ramfjordmoen Ionosonde Data April 2015

, 2019
About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from April 01-30, 2015.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at ...
Tromsø Geophysical Observatory
core   +1 more source