Results 61 to 70 of about 5,624 (239)
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
Frontiers in Astronomy and Space Sciences, 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).
Arti Bhardwaj +13 more
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The Real‐Time Advanced Ionospheric Data Assimilation (AIDA) Model
Space Weather, Volume 24, Issue 2, February 2026.Abstract The Advanced Ionospheric Data Assimilation (AIDA) is a real‐time data assimilation model of global 3D ionosphere and plasmasphere electron density. Changes in the local space environment can occur on very short timescales, particularly during disturbed geomagnetic conditions.
Benjamin Reid +5 more
wiley +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
A comparative study of GPS ionospheric scintillations and ionogram spread F over Sanya
, 2015 . We analyze the data recorded during December 2011–November 2012 by a digital ionosonde and a GPS (Global Positioning System) scintillation and (total electron content) TEC receiver collocated at Sanya (109.6° E, 18.3° N; dip lat.
Yun L. Zhang +5 more
semanticscholar +1 more source
The First Results of Ionospheric Skywave Propagation Experiment Over Taiwan
Radio Science, Volume 61, Issue 1, January 2026.Abstract An ionospheric over‐the‐horizon propagation experiment was carried out in Taiwan to investigate characteristics of ionospheric F layer skywave propagation at frequencies 4–12 MHz. Experimental results show that there are prominent diurnal variations in the incident angle, virtual height and plasma frequency at reflection height, which are ...
Hung‐Shi Lin +3 more
wiley +1 more source
Trace Extraction and Repair of the F Layer from Pictorial Ionograms
AtmospherePublicly available ionograms are often in the form of pictures. This paper proposes a novel algorithm for extracting and repairing the F layer traces from pictorial ionograms.
Jiayi Wang +4 more
doaj +1 more source
Features of backscatter ionospheric sounding as studied with a chirp ionosonde
Solar-Terrestrial Physics, 2017 We present the results of the studies of backscatter ionospheric sounding (BS) on the basis of a multipurpose chirp ionosonde developed in ISTP SB RAS. We analyze BS experimental data obtained during different seasons from 2005 to 2009.
Ponomarchuk S.N. +2 more
doaj +1 more source