Results 31 to 40 of about 1,807 (203)
Український антарктичний журнал, 2020 The article presents the developed artificial neural network for F2 ionosphere layer traces scaling on ionograms obtained using the IPS-42 ionosonde installed at the Ukrainian Antarctic Akademik Vernadsky station.
O. Bogomaz +4 more
doaj +1 more source
Spread F and Normal Labelled Ionograms
, 2021 This dataset contains over 28377 ionograms which have been labelled as either having spread F or not. The folders are labelled Train, Validation, and Test for the Training, Validation, and Test when training machine learning algorithms.
Luwanga Christopher
core +1 more source
Multi-instrumental detection of a fireball during Leonids of 2019
Frontiers in Astronomy and Space Sciences, 2023 During the 2019 Leonid meteor shower, the European Fireball Network recorded a bright fireball (meteor code: EN171119_041459) at 04:15:0.2 (UT) on 17 November 2019.
Cs. Szárnya +7 more
doaj +1 more source
The effect of collisions in ionogram inversion [PDF]
Advances in Space Research, 2013 14 pages, 4 ...
Scotto, Carlo, Settimi, Alessandro
openaire +2 more sources
Global Ionospheric Responses to Four X‐Class Solar Flares in November 2025
Space Weather, Volume 24, Issue 11, November 2026.Abstract We investigate global ionospheric responses to four X‐class solar‐disk flares that occurred in November 2025 from the same solar active region, using multi‐instrument observations including GNSS, ionosonde, geomagnetic and GOES solar irradiance data. Pronounced dayside TEC enhancements are observed for three flares (#2 X1.2, #3 X5.1, and #4 X4.
Lei Liu, Shasha Zou
wiley +1 more source
Modeling ionograms and critical plasma frequencies with neural networks
Frontiers in Astronomy and Space SciencesIonosondes offer broad spatial coverage of the lower ionosphere, supported by a global network of affordable instruments. This motivates the exploration of new methods that exploit this geographical coverage to capture spatially dependent characteristics
Enrique L. Rojas +2 more
doaj +1 more source
Space Weather, Volume 24, Issue 10, October 2026.Abstract This paper investigates the dynamic evolution of a storm‐time “Super‐EPB” event over China on 1 December 2023 (Kp ≤ 7, SYM/H ≥ −130 nT) using multi‐instrument observations. Occurring near sunset as the IMF‐Bz abruptly turned southward, with auroral extension to midlatitudes, the “Super‐EPB” extended to 40°N with an apex height of ∼2,460 km ...
Longchang Sun +11 more
wiley +1 more source
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 +21 more
wiley +1 more source
Image processing of digital chest ionograms
The British Journal of Radiology, 1988 Abstract A number of image-processing techniques have been applied to a digital ionographic chest image in order to evaluate their possible effects on this type of image. In order to quantify any effect, a simulated lesion was superimposed on the image at a variety of locations representing different types of structural detail ...
J R, Yarwood, B M, Moores
openaire +2 more sources
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 +8 more
wiley +1 more source