Results 21 to 30 of about 128 (95)

Evaluation of Automated Spread–F (SF) Detection over the Midlatitude Ionosphere

Atmosphere
The present study evaluates an automated Spread–F (SFP) detection algorithm by integrating SF-related (QF, FF) and ionospheric parameters (hmF2, h’F), acting as an indicator for SF events, from SAO Explorer auto-scaled (ARTIST) data, compared to manually
Krishnendu Sekhar Paul, Trisani Biswas, Haris Haralambous   +2 more
doaj   +2 more sources

A new index for statistical analyses and prediction of travelling ionospheric disturbances [PDF]

, 2023
Travelling Ionospheric Disturbances (TIDs) are signatures of atmospheric gravity waves (AGWs) observed in changes in the electron density. The analysis of TIDs is relevant for studying coupling processes in the thermosphere–ionosphere system.
Borries, Claudia, Borges, R. A., Claudia Borries, Arthur Amaral Ferreira, Nykiel, Grzegorz, Grzegorz Nykiel, Renato Alves Borges, Ferreira, Arthur Amaral   +7 more
core   +1 more source

Direct Connection Between Auroral Oval Streamers/Flow Channels and Equatorward Traveling Ionospheric Disturbances

Frontiers in Astronomy and Space Sciences, 2021
We use simultaneous auroral imaging, radar flows, and total electron content (TEC) measurements over Alaska to examine whether there is a direct connection of large-scale traveling ionospheric disturbances (LSTIDs) to auroral streamers and associated ...
Larry R. Lyons, Yukitoshi Nishimura, Shunrong Zhang, Anthea Coster, Jiang Liu, Jiang Liu, William A. Bristow, Ashton S. Reimer, Roger H. Varney, Don L. Hampton   +9 more
doaj   +1 more source

Statistical analysis and predictability of large scale travelling ionospheric disturbances over Europe [PDF]

, 2022
Since the ionosphere electron density has an effect on radiowave propagation, it is essential to characterize and predict the occurrence of ionosphere perturbations. Ionosphere perturbations are particularly strong during storm conditions, when the solar
Borries, Claudia, Ferreira, Arthur Amaral, Borges, Renato Alves   +2 more
core  

Traveling Ionospheric Disturbances Induced by the Secondary Gravity Waves From the Tonga Eruption on 15 January 2022: Modeling With MESORAC‐HIAMCM‐SAMI3 and Comparison With GPS/TEC and Ionosonde Data [PDF]

, 2023
We simulate the gravity waves (GWs) and traveling ionospheric disturbances (TIDs) created by the Hunga Tonga-Hunga Ha'apai (hereafter “Tonga”) volcanic eruption on 15 January 2022 at ∼04:15 UT.
Figueiredo, Cosme, Themens, David R.; id_orcid, Cosme Figueiredo, Becker, Erich, Hindley, Neil P., David R. Themens, Themens, David R., Hindley, Neil, Sebastijan Mrak, Sharon L. Vadas, Katrina Bossert, Vadas, Sharon L., Galkin, Ivan, Bossert, Katrina, Mrak, Sebastijan, Erich Becker, Huba, J. D., Neil P. Hindley, Ivan Galkin, J. D. Huba   +19 more
core   +1 more source

Properties and Generation of Large Scale Travelling Ionospheric Disturbances during 8 September 2017 [PDF]

, 2020
Large Scale Travelling Ionospheric Disturbances (LSTIDs) are a frequent phenomenon during ionospheric storms, indicating strong electrodynamic processes in high latitudes.
Borries, Claudia, Xiong, Chao, Mielich, Jens, Kouba, Daniel, Ferreira, Arthur Amaral, Borges, Renato Alves   +5 more
core   +1 more source

Storm-time observations of traveling ionospheric disturbances and ionospheric irregularities in East Africa [PDF]

, 2022
In this paper equatorward propagating large scale traveling ionospheric disturbance (LSTID) on 17 March 2015 were investigated using the Statistical Angle-of-Arrival and Doppler Method for GPS (SADM-GPS) radio interferometry technique in data-scarce East
Ulich, T. (Thomas), Moges, S. T. (Samson T.), Chekole, D. A. (Daniel Atnafu), Sherstyukov, R. O. (R. O.), Giday, N. M. (Nigussie Mezgebe)   +4 more
core   +2 more sources

Supporting Information for "First Observations of Large Scale Traveling Ionospheric Disturbances Using Automated Amateur Radio Receiving Networks"

, 2022
Introduction The supporting information for this paper consists of a movie version of Figure 2 in the main paper, comparing the high frequency (HF) amateur radio observations to differential Global Navigation Satellite System (GNSS) Total Electron ...
Erickson, Philip J., Baker, Joseph B. H., Frissell, Nathaniel A., West, Mary Lou, Sanchez, Diego F., Perry, Gareth W., Kaeppler, Stephen R., Engelke, William D., Coster, Anthea J., Ruohoniemi, J. Michael   +9 more
core   +1 more source

Multi‐Step Gravity Wave Propagation From a Tropospheric Vortex to the Ionosphere Near the Tibetan Plateau

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The atmosphere and ionosphere form a vertically coupled system in which disturbances in the lower atmosphere can modulate ionospheric variability. Using reanalysis data, ground‐based GNSS observations, and COSMIC‐2 profiles, we investigate gravity waves (GWs) generation and upward coupling during a southwest vortex (SWV) event over the Tibetan
Wei Yao, Huijun Le, Wenjie Sun, Libo Liu, Yiding Chen   +4 more
wiley   +1 more source

Ionospheric Characterization Over Iran Using Multi‐Frequency IMB HF Transmitters and Global WSPRNET Reception During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 6, June 2026.
Abstract The Ionospheric Monitoring Beacon network in Iran provides continuous, multi‐frequency high‐frequency (HF) transmissions using WSPRNET modulation, enabling global reception and near–real‐time monitoring of ionospheric propagation conditions.
A. Mahmoudian, Saba Hafizi Lotfabadi, Mohammad Azimi   +2 more
wiley   +1 more source