Results 51 to 60 of about 1,552 (215)
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 +10 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract Thunderstorms could cause the irregularities of electron density distributions in the ionosphere by exciting gravity waves and modifying ambient electric field (E‐field). By comparing the DPS‐4D ionosonde observation at 5‐min resolution at Fuke Station in Hainan, China with the lightning detection data, we studied the F‐layer responses to a ...
Zhengwei Cheng +11 more
wiley +1 more source
Synthetic‐Data‐Driven Supervised Learning for Pixel‐Wise Recognition of Ionogram Layer Traces
Journal of Geophysical Research: Machine Learning and ComputationThe 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 +4 more
doaj +1 more source
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. +4 more
doaj +1 more source
Numerical simulation of the propagation of electromagnetic waves in ionospheric irregularities
Earth and Planetary Physics, 2020 The characteristics of high-frequency (HF) electromagnetic (EM) wave propagation can be affected when EM waves propagate in the ionosphere. When ionospheric irregularities appear in the ionosphere, they can have a serious impact on the propagation of HF ...
ChunHua Jiang +4 more
doaj +1 more source
Some aspects of large-scale travelling ionospheric disturbances which originate at conjugate locations in auroral zones, cross the equator and sometimes encircle the earth [PDF]
Annales Geophysicae, 2011 The occurrence of large-scale travelling ionospheric disturbances (LS-TIDs) has been examined. Initially some literature on their generation is considered.
G. G. Bowman, I. K. Mortimer
doaj +1 more source
Multi‐Decadal Trends in the Low Latitude foF2 Driven by Secular Magnetic Variations
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract Long‐term ionospheric trends have been widely studied, but their origin and magnitude remain subjects of debate. This study quantifies the linear trend in the F2‐region critical frequency (foF2) and its local time dependence using observations from eight low‐latitude ionosonde stations.
D. Singh +4 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 +2 more
openaire +1 more source
, 2023 We have examined ionospheric response to eleven earthquake events measuring less than four on the Richter scale during the year 2020 that occurred in the vicinity of New Delhi (28.6°N, 77.2°E, 42.4°N dip).
M. V. Sunil Krishna (16802025) +9 more
core +1 more source
IRI-2012 MODEL ADAPTABILITY ESTIMATION FOR AUTOMATED PROCESSING OF VERTICAL SOUNDING IONOGRAMS [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2014 The paper deals with possibility of IRI-2012 global empirical model applying to the vertical sounding of the ionosphere semiautomatic data processing.
V. D. Nikolaeva +3 more
doaj